Details of the Researcher

PHOTO

Hiroyuki Nojiri
Section
Institute for Materials Research
Job title
Professor
Degree

  • 博士（理学）（東北大学）

  • 工学修士（大阪大学）

Research History 5

  • 2001/04 - 2004/04
    Department of Physics, Okayama University　Professor

  • 1995/05 - 2001/03
    Institute for Materials Research, Tohoku University　Associate Professor

  • 1991/11 - 1995/04
    Institute for Solid State Physics, University of Tokyo　Research Associate

  • 1986/04 - 1991/10
    Department of Physics, Kobe University　Technical Assistant

  • 2004/05 -
    Institute for Materials Research, Tohoku University　Professor

Education 3

  • Osaka University　Graduate School of Engineering Science　Master Course in Condensed Matter Physics

    1984/04 - 1986/03

  • Kyoto University　Faculty of Science

    1980/04 - 1984/03

  • School of Science, Osaka University　Department of Physics　Dr. Degree of Physics(Dissertation)

    1993/03 -

Committee Memberships 14

  • ICC-IMR　Director

    2021/04 - Present

  • HMF Science Development Team　Committee Member

    2021/01 - Present

  • High Magnetic Field Colaboratory of Japan　Advisory Board

    2020/04 - Present

  • Mochizuki Foundation　Council Member

    2017/06 - Present

  • The Laboratoire National des Champs Magnétiques Intenses (LNCMI) Science Council(科学評価委員会)　Science Council

    2016/10 - Present

  • Global Meeting on High Magnetic Fields　Council Member

    2014/10 - Present

  • Division of Condensed Matter Physics, AAPPS　Chair

    2023/01 - 2024/12

  • Society of Electron Spin Science and Technology　President

    2022/01 - 2023/12

  • Physical Society of Japan　Board of directors

    2019/04 - 2023/03

  • Division of Condensed Matter Physics, AAPPS　Division of Condensed Matter Physics, AAPPS

    2021/01 - 2022/12

  • Society of Electron Spin Science and Technology　Vice President

    2019/01 - 2021/12

  • High Magnetic Field Forum of Japan　Council Member

    2002/11 - 2021/12

  • The Laboratoire National des Champs Magnétiques Intenses (LNCMI) Scientific Council　委員

    2012/03 - 2016/02

  • 日本物理学会領域委員会　領域3代表

    2013/04 - 2014/03

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Professional Memberships 8

  • Division of Condensed Matter Physics of AAPPS

    2021/01 -

  • Society of Electron Spin Science and Technology

  • Physical Society of Japan

  • Cryogenics and Superconductivity Society of Japan

    2018/08 - Present

  • The Japanese Society for Synchrotron Radiation Research

  • High Magnetic Forum of Japan

  • Society of Muon and Meson Science of Japan

  • The Japanese Society for Neutron Science

︎Show all ︎Show first 5

Research Interests 4

  • Quantum Beam Science

  • THz-ESR

  • High Magnetic Field Science

  • Quantum Spin Manipulation

Research Areas 1

  • Natural sciences / Magnetism, superconductivity, and strongly correlated systems /

Awards 1

  1. 第22回日本中性子学会技術賞

    2024/12　日本中性子学会　パルス強磁場下における中性子回折技術の開発と応用

Papers 432

  1. Magnetically tuned continuous transition from weak to strong coupling in terahertz magnon polaritons Peer-reviewed

    Andrey Baydin, Kenji Hayashida, Takuma Makihara, Fuyang Tay, Xiaoxuan Ma, Wei Ren, Guohong Ma, G. Timothy Noe, Ikufumi Katayama, Jun Takeda, Hiroyuki Nojiri, Shixun Cao, Motoaki Bamba, Junichiro Kono

    Physical Review Research　5　(1)　2023/03/20

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevresearch.5.l012039 　

    eISSN： 2643-1564

  2. Enhanced charge density wave with mobile superconducting vortices in La1.885Sr0.115CuO4 Peer-reviewed

    J.-J. Wen, W. He, H. Jang, H. Nojiri, S. Matsuzawa, S. Song, M. Chollet, D. Zhu, Y.-J. Liu, M. Fujita, J. M. Jiang, C. R. Rotundu, C.-C. Kao, H.-C. Jiang, J.-S. Lee, Y. S. Lee

    Nature Communications　14　(1)　2023/02/09

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41467-023-36203-x 　

    eISSN： 2041-1723

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    Abstract Superconductivity in the cuprates is found to be intertwined with charge and spin density waves. Determining the interactions between the different types of order is crucial for understanding these important materials. Here, we elucidate the role of the charge density wave (CDW) in the prototypical cuprate La1.885Sr0.115CuO4, by studying the effects of large magnetic fields (H) up to 24 Tesla. At low temperatures (T), the observed CDW peaks reveal two distinct regions in the material: a majority phase with short-range CDW coexisting with superconductivity, and a minority phase with longer-range CDW coexisting with static spin density wave (SDW). With increasing magnetic field, the CDW first grows smoothly in a manner similar to the SDW. However, at high fields we discover a sudden increase in the CDW amplitude upon entering the vortex-liquid state. Our results signify strong coupling of the CDW to mobile superconducting vortices and link enhanced CDW amplitude with local superconducting pairing across the H − T phase diagram.

  3. Automated Pulsed Magnet System for Neutron Diffraction Experiments at the Materials and Life Science Experimental Facility in J-PARC Peer-reviewed

    Masao Watanabe, Takumi Kihara, Hiroyuki Nojiri

    Quantum Beam Science　7　(1)　1-1　2022/12/27

    Publisher: MDPI AG

    DOI： 10.3390/qubs7010001 　

    eISSN： 2412-382X

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    A pulsed magnet system has been developed as a new user-friendly sample environment equipment at the Materials and Life Science Experimental Facility in Japan Proton Accelerator Research Complex. It comprises a vacuum chamber, a 4 K closed-cycle refrigerator for samples, and a nitrogen bath made of a stainless-steel tube with a miniature solenoidal coil. The coil is cooled by liquid nitrogen supplied by an automatic liquid nitrogen supply system, and the sample is cooled by a refrigerator. This combination facilitates the automatic high magnetic field diffraction measurement for the user’s operation. A relatively large scattering angle 2θ is up to 42°, which is significantly wider than the previous setup. Neutron diffraction experiments were performed on a multiferroic TbMnO3 and the field dependence of the diffraction peaks was clearly observed. The new pulsed magnet system was established for a practical high magnetic field diffraction for the user program.

  4. Characterization of photoinduced normal state through charge density wave in superconducting YBa2Cu3O6.67 Peer-reviewed

    H. Jang, S. Song, T. Kihara, Y. Liu, S. J. Lee, S. Y. Park, M. Kim, H. D. Kim, G. Coslovich, S. Nakata, Y. Kubota, I. Inoue, K. Tamasaku, M. Yabashi, H. Lee, C. Song, H. Nojiri, B. Keimer, C. C. Kao, J. S. Lee

    Sci. Adv.　8　(6)　eabk0832-1-eabk0832-7　2022/02

    DOI： 10.1126/sciadv.abk0832 　

  5. Application of THz ESR on Artificial Giant Spins in Magnetic Molecules Peer-reviewed

    Hiroyuki Nojiri

    Applied Magnetic Resonance　2021/04/05

    Publisher: Springer Science and Business Media {LLC}

    DOI： 10.1007/s00723-021-01317-2 　

  6. Randomly Hopping Majorana Fermions in the Diluted Kitaev System α - Ru0.8Ir0.2Cl3

    Seung-Hwan Do, C.{\hspace{0.167em } }H. Lee, T. Kihara, Y.{\hspace{0.167em } }S. Choi, Sungwon Yoon, Kangwon Kim, Hyeonsik Cheong, Wei-Tin Chen, Fangcheng Chou, H. Nojiri, Kwang-Yong Choi

    Physical Review Letters　124　(4)　2020/01/31

    Publisher: American Physical Society ({APS})

    DOI： 10.1103/physrevlett.124.047204 　

    ISSN： 1079-7114

  7. Magnetic structures and quadratic magnetoelectric effect in LiNiPO4 beyond 30 T

    Fogh, E., Kihara, T., Toft-Petersen, R., Bartkowiak, M., Narumi, Y., Prokhnenko, O., Miyake, A., Tokunaga, M., Oikawa, K., Sørensen, M.K., Dyrnum, J.C., Grimmer, H., Nojiri, H., Christensen, N.B.

    Physical Review B　101　(2)　2020

    DOI： 10.1103/PhysRevB.101.024403 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  8. Terahertz Faraday and Kerr Rotation Spectroscopy of Bi1-xSbx Films in High Magnetic Fields up to 30 Tesla Peer-reviewed

    X. Li, K. Yoshioka, M. Xie, T. Hagiwara, G. T. Noe II, W. Lee, N. Marquez Peraca, W. Gao, T. Hagiwara, H. S. Orjan, L-W. Nien, T. Nagao, M. Kitajima, H. Nojiri, X. Li, C-K. Shih, A. H. MacDonald, I. Katayama, J. Takeda, G. A. Fiete, J. Kono

    PHYSICAL REVIEW B　Vol.100　(11)　2019/09/15

    DOI： 10.1103/PhysRevB.100.115145 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  9. Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs2CuCl4 Peer-reviewed

    Zvyagin, S. A., Graf, D., Sakurai, T., Kimura, S., Nojiri, H., Wosnitza, J., Ohta, H., Ono, T., Tanaka, H.

    Nat. Commun.　2019　(10)　1064　2019/03

  10. An [FeIII<inf>34</inf>] Molecular Metal Oxide Peer-reviewed

    Dearle, A.E., Cutler, D.J., Fraser, H.W.L., Sanz, S., Lee, E., Dey, S., Diaz-Ortega, I.F., Nichol, G.S., Nojiri, H., Evangelisti, M., Rajaraman, G., Schnack, J., Cronin, L., Brechin, E.K.

    Angewandte Chemie - International Edition　58　(47)　16903-16906　2019

    DOI： 10.1002/anie.201911003 　

  11. Electron-Transfer Activity in a Cyanide-Bridged Fe<inf>42</inf> Nanomagnet Peer-reviewed

    Baker, M.L., Wu, S.-Q., Kang, S., Matsuzawa, S., Arrio, M.-A., Narumi, Y., Kihara, T., Nakamura, T., Kotani, Y., Sato, O., Nojiri, H.

    Inorganic Chemistry　58　(15)　10160-10166　2019

    DOI： 10.1021/acs.inorgchem.9b01216 　

  12. Evidence of low-energy singlet excited states in the spin- 12 polyhedral clusters { M o72 V30} and { W72 V30} with strongly frustrated kagome networks

    Kihara, T., Nojiri, H., Narumi, Y., Oshima, Y., Kindo, K., Heesing, C., Schnack, J., Müller, A.

    Physical Review B　99　(6)　2019

    DOI： 10.1103/PhysRevB.99.064430 　

  13. Coincident onset of charge-density-wave order at a quantum critical point in underdoped YBa2Cu3 Ox Peer-reviewed

    H. Jang, W. S. Lee, S. Song, H. Nojiri, S. Matsuzawa, H. Yasumura, H. Huang, Y. J. Liu, J. Porras, M. Minola, B. Keimer, J. Hastings, D. Zhu, T. P. Devereaux, Z. X. Shen, C. C. Kao, J. S. Lee

    Physical Review B　97　(22)　224513-1-5　2018/06/14

    Publisher: American Physical Society

    DOI： 10.1103/PhysRevB.97.224513 　

    ISSN： 2469-9969 2469-9950

  14. URu2Si2 under intense magnetic fields: From hidden order to spin-density wave Peer-reviewed

    W. Knafo, D. Aoki, G. W. Scheerer, F. Duc, F. Bourdarot, K. Kuwahara, H. Nojiri, L. P. Regnault, J. Flouquet

    Physica B: Condensed Matter　536　457-460　2018/05/01

    Publisher: Elsevier B.V.

    DOI： 10.1016/j.physb.2017.09.062 　

    ISSN： 0921-4526

  15. Chemical trend on the lanthanide-radical exchange coupling Peer-reviewed

    Takayuki Ishida, Takeshi Nakamura, Takumi Kihara, Hiroyuki Nojiri

    POLYHEDRON　136　149-154　2017/11

    DOI： 10.1016/j.poly.2017.03.008 　

    ISSN： 0277-5387

  16. 40T Soft X-ray Spectroscopies on Magnetic-Field-Induced Valence Transition in Eu(Rh1-xIrx)(2)Si-2 (x=0.3) Peer-reviewed

    Hiromasa Yasumura, Yasuo Narumi, Tetsuya Nakamura, Yoshinori Kotani, Akira Yasui, Eigo Kishaba, Akihiro Mitsuda, Hirofumi Wada, Koichi Kindo, Hiroyuki Nojiri

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　86　(5)　054706-1-8　2017/05

    DOI： 10.7566/JPSJ.86.054706 　

    ISSN： 0031-9015

  17. Giant Exchange Coupling Evidenced with a Magnetization Jump at 52 T for a Gadolinium-Nitroxide Chelate Peer-reviewed

    Takuya Kanetomo, Takumi Kihara, Atsushi Miyake, Akira Matsuo, Masashi Tokunaga, Koichi Kindo, Hiroyuki Nojiri, Takayuki Ishida

    INORGANIC CHEMISTRY　56　(6)　3310-3314　2017/03

    DOI： 10.1021/acs.inorgchem.61302685 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  18. Field-induced reentrant magnetoelectric phase in LiNiPO4 Peer-reviewed

    Rasmus Toft-Petersen, Ellen Fogh, Takumi Kihara, Jens Jensen, Katharina Fritsch, Jooseop Lee, Garrett E. Granroth, Matthew B. Stone, David Vaknin, Hiroyuki Nojiri, Niels Bech Christensen

    PHYSICAL REVIEW B　95　(6)　064421-1-8　2017/02

    DOI： 10.1103/PhysRevB.95.064421 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  19. Ideal charge-density-wave order in the high-field state of superconducting YBCO Peer-reviewed

    H. Jang, W. -S. Lee, H. Nojiri, S. Matsuzawa, H. Yasumura, L. Nie, A. V. Maharaj, S. Gerber, Y. -J. Liu, A. Mehta, D. A. Bonn, R. Liang, W. N. Hardy, C. A. Burns, Z. Islam, S. Song, J. Hastings, T. P. Devereaux, Z. -X. Shen, S. A. Kivelson, C. -C. Kao, D. Zhu, J. -S. Lee

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA　113　(51)　14645-14650　2016/12

    DOI： 10.1073/pnas.1612849113 　

    ISSN： 0027-8424

  20. Field-induced spin-density wave beyond hidden order in URu2Si2 Peer-reviewed

    W. Knafo, F. Duc, F. Bourdarot, K. Kuwahara, H. Nojiri, D. Aoki, J. Billette, P. Frings, X. Tonon, E. Lelievre-Berna, J. Flouquet, L. -P. Regnault

    NATURE COMMUNICATIONS　7　13075-1-7　2016/10

    DOI： 10.1038/ncomms13075 　

    ISSN： 2041-1723

  21. Three-dimensional charge density wave order in YBa2Cu3O6.67 at high magnetic fields Peer-reviewed

    S. Gerber, H. Jang, H. Nojiri, S. Matsuzawa, H. Yasumura, D. A. Bonn, R. Liang, W. N. Hardy, Z. Islam, A. Mehta, S. Song, M. Sikorski, D. Stefanescu, Y. Feng, S. A. Kivelson, T. P. Devereaux, Z. -X. Shen, C. -C. Kao, W. -S. Lee, D. Zhu, J. -S. Lee

    SCIENCE　350　(6263)　949-952　2015/11

    DOI： 10.1126/science.aac6257 　

    ISSN： 0036-8075

    eISSN： 1095-9203

  22. Strong Ferromagnetic Exchange Interactions in Hinge-like Dy(O2Cu)(2) Complexes Involving Double Oxygen Bridges Peer-reviewed

    Yumi Ida, Soumavo Ghosh, Ashutosh Ghosh, Hiroyuki Nojiri, Takayuki Ishida

    INORGANIC CHEMISTRY　54　(19)　9543-9555　2015/10

    DOI： 10.1021/acs.inorgchem.5b01583 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  23. Valence-specific magnetization of the charge-ordered multiferroelectric LuFe2 O4 using soft x-ray magnetic circular dichroism under 30 T pulsed high magnetic fields Peer-reviewed

    Yasuo Narumi, Tetsuya Nakamura, Kota Saito, Takayuki Morioka, Yukimasa Fukada, Takashi Kambe, Naoshi Ikeda, Yoshinori Kotani, Toyohiko Kinoshita, Koichi Kindo, Hiroyuki Nojiri

    Physical Review B - Condensed Matter and Materials Physics　91　(1)　2015/01/12

    Publisher: American Physical Society

    DOI： 10.1103/PhysRevB.91.014410 　

    ISSN： 1550-235X 1098-0121

    eISSN： 1550-235X

  24. A ferromagnetically coupled Fe-42 cyanide-bridged nanocage Peer-reviewed

    Soonchul Kang, Hui Zheng, Tao Liu, Kohei Hamachi, Shinji Kanegawa, Kunihisa Sugimoto, Yoshihito Shiota, Shinya Hayami, Masaki Mito, Tetsuya Nakamura, Motohiro Nakano, Michael L. Baker, Hiroyuki Nojiri, Kazunari Yoshizawa, Chunying Duan, Osamu Sato

    Nature Communications　6　5955-1-6　2015/01

    DOI： 10.1038/ncomms6955 　

    ISSN： 2041-1723

  25. Almost Perfect Frustration in the Dimer Magnet Ba2CoSi2O6Cl2 Peer-reviewed

    Hidekazu Tanaka, Nobuyuki Kurita, Makiko Okada, Eiji Kunihiro, Yutaka Shirata, Kotaro Fujii, Hidehiro Uekusa, Akira Matsuo, Koichi Kindo, Hiroyuki Nojiri

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　83　(10)　103701-1-5　2014/10

    DOI： 10.7566/JPSJ.83.103701 　

    ISSN： 0031-9015

  26. Exchange Coupling and Its Chemical Trend Studied by High-Frequency EPR on Heterometallic [Ln(2)Ni] Complexes Peer-reviewed

    Atsushi Okazawa, Takashi Shimada, Norimichi Kojima, Shunsuke Yoshi, Hiroyuki Nojiri, Takayuki Ishida

    INORGANIC CHEMISTRY　52　(23)　13351-13355　2013/12

    DOI： 10.1021/ic402417h 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  27. Magnetic Structure of Phase II in U(Ru0.96Rh0.04)(2)Si-2 Determined by Neutron Diffraction under Pulsed High Magnetic Fields Peer-reviewed

    K. Kuwahara, S. Yoshii, H. Nojiri, D. Aoki, W. Knafo, F. Duc, X. Fabreges, G. W. Scheerer, P. Frings, G. L. J. A. Rikken, F. Bourdarot, L. P. Regnault, J. Flouquet

    PHYSICAL REVIEW LETTERS　110　(21)　216406-1-5　2013/05

    DOI： 10.1103/PhysRevLett.110.216406 　

    ISSN： 0031-9007

  28. Neutron Laue Diffraction Study on the Magnetic Phase Diagram of Multiferroic MnWO4 under Pulsed High Magnetic Fields Peer-reviewed

    H. Nojiri, S. Yoshii, M. Yasui, K. Okada, M. Matsuda, J. -S. Jung, T. Kimura, L. Santodonato, G. E. Granroth, K. A. Ross, J. P. Carlo, B. D. Gaulin

    PHYSICAL REVIEW LETTERS　106　(23)　237202-1-4　2011/06

    DOI： 10.1103/PhysRevLett.106.237202 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  29. Neutron Diffraction Study on the Multiple Magnetization Plateaus in TbB4 under Pulsed High Magnetic Field Peer-reviewed

    S. Yoshii, K. Ohoyama, K. Kurosawa, H. Nojiri, M. Matsuda, P. Frings, F. Duc, B. Vignolle, G. L. J. A. Rikken, L. -P. Regnault, S. Michimura, F. Iga

    PHYSICAL REVIEW LETTERS　103　(7)　077203-1-4　2009/08

    DOI： 10.1103/PhysRevLett.103.077203 　

    ISSN： 0031-9007

  30. Oximate-bridged trinuclear Dy-Cu-Dy complex behaving as a single-molecule magnet and its mechanistic investigation Peer-reviewed

    F Mori, T Nyui, T Ishida, T Nogami, KY Choi, H Nojiri

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　128　(5)　1440-1441　2006/02

    DOI： 10.1021/ja057183f 　

    ISSN： 0002-7863

  31. Half-step magnetization in the polyoxometalate family with {Cu-3}-type triangular spin ring Peer-reviewed

    K-Y Choi, Y. H. Matsuda, H. Nojiri, U. Kortz, F. Hussain, N. S. Dalal

    YAMADA CONFERENCE LX ON RESEARCH IN HIGH MAGNETIC FIELDS　51　95-+　2006

    DOI： 10.1088/1/1742-6596/51/1/020 　

    ISSN： 1742-6588

  32. ESR investigation on the breather mode and the spinon-breather dynamical crossover in Cu benzoate Peer-reviewed

    T. Asano, H. Nojiri, Y. Inagaki, J. P. Boucher, T. Sakon, Y. Ajiro, M. Motokawa

    Physical Review Letters　84　(25)　5880-5883　2000

    DOI： 10.1103/PhysRevLett.84.5880 　

    ISSN： 0031-9007

  33. Two ferromagnetic phases in La0.88Sr0.12MnO3 Peer-reviewed

    H. Nojiri, K. Kaneko, M. Motokawa, K. Hirota, K. Takahashi, Y. Endoh

    Phys. Rev. B　60　4142-4148　1999/12/31

  34. Two ferromagnetic phases in La1-xSrxMnO3 (x similar to 1/8) Peer-reviewed

    H Nojiri, K Kaneko, M Motokawa, K Hirota, Y Endoh, K Takahashi

    PHYSICAL REVIEW B　60　(6)　4142-4148　1999/08

    ISSN： 1098-0121

    eISSN： 1550-235X

  35. Neutron diffraction study of triangular lattice antiferromagnet CuFeO2 under high magnetic field Peer-reviewed

    S. Mitsuda, T. Uno, M. Mase, H. Nojiri, K. Takahashi, M. Motokawa, M. Arai

    Journal of Physics and Chemistry of Solids　60　(8)　1249-1251　1999

    Publisher: Elsevier Science Ltd

    DOI： 10.1016/S0022-3697(99)00096-7 　

    ISSN： 0022-3697

  36. ESR study of the opening and closing of the field-induced gap in NH4CuCl3 Peer-reviewed

    B. Kurniawan, H. Tanaka, K. Takatsu, W. Shiramura, T. Fukuda, H. Nojiri, M. Motokawa

    Physical Review Letters　82　(6)　1281-1284　1999

    DOI： 10.1103/PhysRevLett.82.1281 　

    ISSN： 1079-7114 0031-9007

  37. Direct observation of the multiple spin gap excitations in two-dimensional dimer system SrCu2(BO3)2 Peer-reviewed

    Hiroyuki Nojiri, Hiroshi Kageyama, Kenzo Onizuka, Yutaka Ueda, Mitsuhiro Motokawa

    Journal of the Physical Society of Japan　68　(9)　2906-2909　1999

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJ.68.2906 　

    ISSN： 0031-9015

  38. Observation of the Magnonic Dicke Superradiant Phase Transition Peer-reviewed

    Kaden Hazzard, Liang Luo, shojiro kimura, Henry O. Everitt, Joong-Mok Park, Hao-Tian Wei, Xinwei Li, Di Cheng, HIROYUKI NOJIRI, Dasom Kim, Jacques Doumani, Xiaoxuan Ma, Wanting Yang, Sohail Dasgupta, JIGANG WANG, Richard H. J. Kim, Shixun Cao, Junichiro Kono, Motoaki BAMBA

    Science Advances　2025/04/04

    DOI： 10.1126/sciadv.adt1691 　

  39. Stellated cuboctahedron of FeIII Peer-reviewed

    Lucinda R. B. Wilson, Angelos B. Canaj, Daniel J. Cutler, Laura J. McCormick McPherson, Simon J. Coles, Hiroyuki Nojiri, Marco Evangelisti, Jürgen Schnack, Scott J. Dalgarno, Euan K. Brechin

    Angewandte Chemie　2024/09/09

    DOI： 10.1002/ange.202405666 　

  40. Magnetism of pseudospin-1/2 pyrochlore antiferromagnet Na3Co(CO3)2Cl Peer-reviewed

    Kazuhiro Nawa, Ryo Murasaki, Shinichi Itoh, Hiraku Saito, Hiroyuki Nojiri, Clarina Dela Cruz, Daisuke Okuyama, Masahiro Yoshida, Daichi Ueta, Hideki Yoshizawa, Taku J Sato

    Journal of Physics: Condensed Matter　36　(49)　495801-495801　2024/09/06

    Publisher: IOP Publishing

    DOI： 10.1088/1361-648x/ad7182 　

    ISSN： 0953-8984

    eISSN： 1361-648X

    More details Close

    Abstract Pyrochlore magnets have attracted interest as systems for realizing critical phenomena, rich magnetic structures, associated topological band structures, and nontrivial quantum phases. Na3Co(CO3)2Cl is a pseudospin-1/2 antiferromagnet in which the Co2+ ions form a pyrochlore network. Its structural and magnetic properties were investigated using magnetization, heat capacity, ESR, single-crystal x-ray diffraction, powder neutron diffraction and powder inelastic neutron scattering. Magnetization and heat capacity measurements indicated a ground-state doublet, which is regarded as pseudospin 1/2, dominated the magnetic properties at low temperatures, with a magnetic exchange of 9.6 K. As the temperature decreases, a magnetic transition is observed at 1.6 K, which is confirmed to be an all-in-all-out magnetic order. The crystal field excitations observed by inelastic neutron scattering experiments indicated the Ising nature of the ground-state doublet. This thorough study revealed that Na3Co(CO3)2Cl can be regarded as a pseudospin-1/2 pyrochlore lattice antiferromagnet with dominant Ising-type interactions.

  41. Dirac spinons intermingled with singlet states in the random kagome antiferromagnet YCu3(OD)6+xBr3−x ( x=0.5 ) Peer-reviewed

    Chanhyeon Lee, Wonjun Lee, Suheon Lee, Takayoshi Yamanaka, Sungmin Jeon, Joydev Khatua, Hiroyuki Nojiri, Kwang-Yong Choi

    Physical Review B　2024/08/15

    DOI： 10.1103/PhysRevB.110.064418 　

  42. Magnetic structure and magnetoelectric properties of the spin-flop phase in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>LiFePO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math> Peer-reviewed

    Sofie Holm-Janas, Mitsuru Akaki, Ellen Fogh, Takumi Kihara, Manh Duc Le, Paola Catarina Forino, Stanislav E. Nikitin, Tom Fennell, Adheena Painganoor, David Vaknin, Masao Watanabe, Niels Bech Christensen, Hiroyuki Nojiri, Rasmus Toft-Petersen

    Physical Review B　109　(17)　2024/05/06

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.109.174413 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  43. Effects of Na deficiency on spin dynamics in the Mott insulating <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Na</mml:mi><mml:mrow><mml:mn>4</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Ir</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:mrow></mml:math> Peer-reviewed

    Y. S. Choi, C. H. Lee, T. Kihara, H. Zheng, H. Nojiri, J. F. Mitchell, Kwang-Yong Choi

    Physical Review B　109　(14)　2024/04/05

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.109.144405 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  44. Terahertz Cavity Magnon Polaritons Peer-reviewed

    T. Elijah Kritzell, Andrey Baydin, Fuyang Tay, Rodolfo Rodriguez, Jacques Doumani, Hiroyuki Nojiri, Henry O. Everitt, Igor Barsukov, Junichiro Kono

    Advanced Optical Materials　2024/04

    DOI： 10.1002/adom.202302270 　

  45. Pressure-tuned quantum criticality in the large-D antiferromagnet DTN Peer-reviewed

    Kirill Yu. Povarov, David E. Graf, Andreas Hauspurg, Sergei Zherlitsyn, Joachim Wosnitza, Takahiro Sakurai, Hitoshi Ohta, Shojiro Kimura, Hiroyuki Nojiri, V. Ovidiu Garlea, Andrey Zheludev, Armando Paduan-Filho, Michael Nicklas, Sergei A. Zvyagin

    Nature Communications　2024/03/14

    DOI： 10.1038/s41467-024-46527-x 　

  46. Field-induced bound-state condensation and spin-nematic phase in SrCu2(BO3)2 revealed by neutron scattering up to 25.9 T Peer-reviewed

    Ellen Fogh, Mithilesh Nayak, Oleksandr Prokhnenko, Maciej Bartkowiak, Koji Munakata, Jian-Rui Soh, Alexandra A. Turrini, Mohamed E. Zayed, Ekaterina Pomjakushina, Hiroshi Kageyama, Hiroyuki Nojiri, Kazuhisa Kakurai, Bruce Normand, Frédéric Mila, Henrik M. Rønnow

    Nature Communications　15　(1)　2024/01/10

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41467-023-44115-z 　

    eISSN： 2041-1723

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    Abstract In quantum magnetic materials, ordered phases induced by an applied magnetic field can be described as the Bose-Einstein condensation (BEC) of magnon excitations. In the strongly frustrated system SrCu2(BO3)2, no clear magnon BEC could be observed, pointing to an alternative mechanism, but the high fields required to probe this physics have remained a barrier to detailed investigation. Here we exploit the first purpose-built high-field neutron scattering facility to measure the spin excitations of SrCu2(BO3)2 up to 25.9 T and use cylinder matrix-product-states (MPS) calculations to reproduce the experimental spectra with high accuracy. Multiple unconventional features point to a condensation of S = 2 bound states into a spin-nematic phase, including the gradients of the one-magnon branches and the persistence of a one-magnon spin gap. This gap reflects a direct analogy with superconductivity, suggesting that the spin-nematic phase in SrCu2(BO3)2 is best understood as a condensate of bosonic Cooper pairs.

  47. Investigation of the impact of A-site cation disorder on the structure, magnetic properties, and magnetic entropy change of trisubstituted divalent ions in La0.7(Ba,Ca,Sr)0.3MnO3 manganite Peer-reviewed

    Dicky Rezky Munazat, Budhy Kurniawan, Nobuyuki Kurita, Xiaodong Wang, Maykel T. E. Manawan, Toto Sudiro, Hiroyuki Nojiri

    Physical Chemistry Chemical Physics　2024

    DOI： 10.1039/D4CP01039F 　

  48. A correlated ferromagnetic polar metal by design Peer-reviewed

    Zhang, J., Shen, S., Puggioni, D., Wang, M., Sha, H., Xu, X., Lyu, Y., Peng, H., Xing, W., Walters, L.N., Liu, L., Wang, Y., Hou, D., Xi, C., Pi, L., Ishizuka, H., Kotani, Y., Kimata, M., Nojiri, H., Nakamura, T., Liang, T., Yi, D., Nan, T., Zang, J., Sheng, Z., He, Q., Zhou, S., Nagaosa, N., Nan, C.-W., Tokura, Y., Yu, R., Rondinelli, J.M., Yu, P.

    Nature Materials　2024

    DOI： 10.1038/s41563-024-01856-6 　

    ISSN： 1476-4660 1476-1122

  49. One-ninth magnetization plateau stabilized by spin entanglement in a kagome antiferromagnet Peer-reviewed

    Jeon, S., Wulferding, D., Choi, Y., Lee, S., Nam, K., Kim, K.H., Lee, M., Jang, T.-H., Park, J.-H., Lee, S., Choi, S., Lee, C., Nojiri, H., Choi, K.-Y.

    Nature Physics　20　(3)　2024

    DOI： 10.1038/s41567-023-02318-7 　

    ISSN： 1745-2481 1745-2473

  50. Field-induced magnetic transitions in the highly anisotropic ferrimagnet ErFe5Al7 studied by high-field x-ray magnetic dichroism Peer-reviewed

    Yamamoto, S., Gorbunov, D.I., Prokhnenko, O., Weschke, E., Miyata, A., Diaz-Ortega, I.F., Strohm, C., Duc, F., Henriques, M.S., Gazizulina, A., Uhlarz, M., Mathon, O., Andreev, A.V., Nojiri, H., Wosnitza, J.

    Physical Review B　109　(9)　2024

    DOI： 10.1103/PhysRevB.109.094404 　

    ISSN： 2469-9969 2469-9950

  51. From field-induced to zero-field SMMs associated with open/closed structures of bis(ZnDy) tetranuclear complexes: a combined magnetic, theoretical and optical study Peer-reviewed

    Andoni Zabala-Lekuona, Xabier Lopez de Pariza, Ismael F. Díaz-Ortega, Javier Cepeda, Hiroyuki Nojiri, Nina P. Gritsan, Alexey A. Dmitriev, Alberto López-Ortega, Antonio Rodríguez-Diéguez, José M. Seco, Enrique Colacio

    Dalton Transactions　2024

    DOI： 10.1039/D4DT00148F 　

  52. Magnetostriction of Heusler Ferromagnetic Alloy, Ni2MnGa0.88Cu0.12, around Martensitic Transition Temperature Peer-reviewed

    Takuo Sakon, Koki Morikawa, Yasuo Narumi, Masayuki Hagiwara, Takeshi Kanomata, Hiroyuki Nojiri, Yoshiya Adachi

    Metals　13　(7)　1185-1185　2023/06/26

    Publisher: MDPI AG

    DOI： 10.3390/met13071185 　

    eISSN： 2075-4701

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    In this study, magnetostriction measurements were performed on the ferromagnetic Heusler alloy, Ni2MnGa0.88Cu0.12, which is characterized by the occurrence of the martensitic phase and ferromagnetic transitions at the same temperature. In the austenite and martensite phases, the alloy crystallizes in the L21 and D022-like crystal structure, respectively. As the crystal structure changes at the martensitic transition temperature (TM), a large magnetostriction due to the martensitic and ferromagnetic transitions induced by magnetic fields is expected to occur. First, magnetization (M-H) measurements are performed, and metamagnetic transitions are observed in the magnetic field of μ0H = 4 T at 344 K. This result shows that the phase transition was induced by the magnetic field under a constant temperature. Forced magnetostriction measurements (ΔL/L) are then performed under a constant temperature and atmospheric pressure (P = 0.1 MPa). Magnetostriction up to 1300 ppm is observed around TM. The magnetization results and magnetostriction measurements showed the occurrence of the magnetic-field-induced strain from the paramagnetic austenite phase to the ferromagnetic martensite phase. As a reference sample, we measure the magnetostriction of the Ni2MnGa-type (Ni50Mn30Ga20) alloy, which causes the martensite phase transition at TM = 315 K. The measurement of magnetostriction at room temperature (298 K) showed a magnetostriction of 3300 ppm. The magnetostriction of Ni2MnGa0.88Cu0.12 is observed to be one-third that of Ni50Mn30Ga20 but larger than that of Terfenol-D (800 ppm), which is renowned as the giant magnetostriction alloy.

  53. Micromagnetic understanding of evolutions of antiferromagnetic domains in NiO Peer-reviewed

    Takahiro Moriyama, Luis Sánchez-Tejerina, Kent Oda, Takuo Ohkochi, Motoi Kimata, Yoichi Shiota, Hiroyuki Nojiri, Giovanni Finocchio, Teruo Ono

    Physical Review Materials　7　(5)　2023/05/12

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevmaterials.7.054401 　

    eISSN： 2475-9953

  54. Dual-radical-based molecular anisotropy and synergy effect of semi-conductivity and valence tautomerization in a photoswitchable coordination polymer Peer-reviewed

    Jing-Wei Dai, Yu-Qin Li, Zhao-Yang Li, Hai-Tao Zhang, Carmen Herrmann, Shohei Kumagai, Marko Damjanović, Markus Enders, Hiroyuki Nojiri, Masakazu Morimoto, Norihisa Hoshino, Tomoyuki Akutagawa, Masahiro Yamashita

    National Science Review　10　(6)　2023/02/23

    Publisher: Oxford University Press ({OUP})

    DOI： 10.1093/nsr/nwad047 　

    ISSN： 2095-5138 2053-714X

    eISSN： 2053-714X

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    <jats:title>Abstract</jats:title> <jats:p>Organic radicals are widely used as linkers or ligands to synthesize molecular magnetic materials. However, studies regarding the molecular anisotropies of radical-based magnetic materials and their multifunctionalities are rare. Herein, a photoisomerizable diarylethene ligand was used to form {[CoIII(3,5-DTSQ·–)(3,5-DTCat2–)]2(6F-DAE-py2)}·3CH3CN·H2O (o-1·3CH3CN·H2O, 6F-DAE-py2 = 1,2-bis(2-methyl-5-(4-pyridyl)-3-thienyl)perfluorocyclopentene), a valence tautomeric (VT) coordination polymer. We directly observed dual radicals for a single crystal using high-field/-frequency (∼13.3 T and ∼360 GHz) electron paramagnetic resonance (EPR) spectroscopy along the c axis, which was further confirmed by angle-dependent Q-band EPR spectroscopy. Moreover, a conductive anomaly close to the VT transition temperature was observed only when probes were attached at the ab plane of the single crystal, indicative of synergy between valence tautomerism and conductivity. Structural anisotropy studies and density functional theory (DFT) calculations revealed that this synergy is due to electron transfer associated with valence tautomerism. This study presents the first example of dual-radical-based molecular anisotropy and charge-transfer-induced conductive anisotropy in a photoswitchable coordination polymer.</jats:p>

  55. Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co3II Complex Peer-reviewed

    Zabala-Lekuona, A., L, art-Gereka, A., Quesada-Moreno, M.M., Mota, A.J., D{\'i}az-Ortega, I.F., Nojiri, H., Krzystek, J., Seco, J.M., Colacio, E.

    Inorganic Chemistry　62　(49)　2023

    DOI： 10.1021/acs.inorgchem.3c02817 　

    ISSN： 1520-510X 0020-1669

  56. Helical spin dynamics in commensurate magnets: A study on brochantite, Cu4SO4(OH)6 Peer-reviewed

    Nikitin, S.E., Xie, T., Gazizulina, A., Ouladdiaf, B., Velamaz{\'a}n, J.A.R., D{\'i}az-Ortega, I.F., Nojiri, H., Anovitz, L.M., Dos Santos, A.M., Prokhnenko, O., Podlesnyak, A.

    Physical Review Research　5　(3)　2023

    DOI： 10.1103/PhysRevResearch.5.033111 　

    ISSN： 2643-1564

  57. Pushing up the easy-axis magnetic anisotropy and relaxation times in trigonal prismatic CoII mononuclear SMMs by molecular structure design Peer-reviewed

    Aritz Landart-Gereka, María Mar Quesada-Moreno, María A. Palacios, Ismael F. Díaz-Ortega, Hiroyuki Nojiri, Mykhaylo Ozerov, J. Krzystek, Enrique Colacio

    Chemical Communications　59　(7)　952-955　2022/12

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d2cc06012d 　

    ISSN： 1359-7345

    eISSN： 1364-548X

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    We have demonstrated that the smaller the distortion of the coordination sphere from the ideal trigonal prismatic geometry in mononuclear CoII complexes, the larger the axial anisotropy, the relaxation times and the magnetic hysteresis.

  58. {ScnGdn} Heterometallic Rings: Tunable Ring Topology for Spin-Wave Excitations Peer-reviewed

    Hao-Lan Zhang, Yuan-Qi Zhai, Hiroyuki Nojiri, Christian Schröder, Hung-Kai Hsu, Yi-Tsu Chan, Zhendong Fu, Yan-Zhen Zheng

    Journal of the American Chemical Society　144　(33)　15193-15202　2022/08/04

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/jacs.2c05421 　

    ISSN： 0002-7863

    eISSN： 1520-5126

  59. Multi-extreme conditions at the Second Target Station Peer-reviewed

    B. Haberl, D. G. Quirinale, C. W. Li, G. E. Granroth, H. Nojiri, M.-E. Donnelly, S. V. Ushakov, R. Boehler, B. L. Winn

    Review of Scientific Instruments　93　(8)　083907-083907　2022/08/01

    Publisher: AIP Publishing

    DOI： 10.1063/5.0093065 　

    ISSN： 0034-6748

    eISSN： 1089-7623

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    Three concepts for the application of multi-extreme conditions under in situ neutron scattering are described here. The first concept is a neutron diamond anvil cell made from a non-magnetic alloy. It is shrunk in size to fit existing magnets and future magnet designs and is designed for best pressure stability upon cooling. This will allow for maximum pressures above 10 GPa to be applied simultaneously with (steady-state) high magnetic field and (ultra-)low temperature. Additionally, an implementation of miniature coils for neutron diamond cells is presented for pulsed-field applications. The second concept presents a set-up for laser-heating a neutron diamond cell using a defocused CO2 laser. Cell, anvil, and gasket stability will be achieved through stroboscopic measurements and maximum temperatures of 1500 K are anticipated at pressures to the megabar. The third concept presents a hybrid levitator to enable measurements of solids and liquids at temperatures in excess of 4000 K. This will be accomplished by a combination of bulk induction and surface laser heating and hyperbaric conditions to reduce evaporation rates. The potential for deployment of these multi-extreme environments within this first instrument suite of the Second Target Station is described with a special focus on VERDI, PIONEER, CENTAUR, and CHESS. Furthermore, considerations for deployment on future instruments, such as the one proposed as TITAN, are discussed. Overall, the development of these multi-extremes at the Second Target Station, but also beyond, will be highly advantageous for future experimentation and will give access to parameter space previously not possible for neutron scattering.

  60. Large easy-axis magnetic anisotropy in a series of trigonal prismatic mononuclear cobalt(<scp>ii</scp>) complexes with zero-field hidden single-molecule magnet behaviour: the important role of the distortion of the coordination sphere and intermolecular interactions in the slow relaxation Peer-reviewed

    Aritz Landart-Gereka, María Mar Quesada-Moreno, Ismael F. Díaz-Ortega, Hiroyuki Nojiri, Mykhaylo Ozerov, J. Krzystek, María A. Palacios, Enrique Colacio

    Inorganic Chemistry Frontiers　9　(12)　2810-2831　2022/03

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d2qi00275b 　

    eISSN： 2052-1553

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    A N6-tripodal ligand allows the preparation of a family of prismatic mononuclear cationic CoII complexes with SMM behavior. Their axial anisotropy, magnetic relaxation and hysteresis width are modulated by the anion effects on the crystal structure.

  61. Magnetic Control of Soft Chiral Phonons in PbTe Peer-reviewed

    Andrey Baydin, Felix G. G. Hernandez, Martin Rodriguez-Vega, Anderson K. Okazaki, Fuyang Tay, G. Timothy Noe, Ikufumi Katayama, Jun Takeda, Hiroyuki Nojiri, Paulo H. O. Rappl, Eduardo Abramof, Gregory A. Fiete, Junichiro Kono

    Physical Review Letters　128　(7)　2022/02/15

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevlett.128.075901 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  62. Soft X-ray absorption spectroscopy and magnetic circular dichroism under pulsed high magnetic field of Ni-Co-Mn-In metamagnetic shape memory alloy Peer-reviewed

    Umetsu, R.Y., Yasumura, H., Narumi, Y., Kotani, Y., Nakamura, T., Nojiri, H., Kainuma, R.

    Journal of Alloys and Compounds　890　2022

    DOI： 10.1016/j.jallcom.2021.161590 　

    ISSN： 0925-8388

  63. X-ray study of ferroic octupole order producing anomalous Hall effect Peer-reviewed

    Motoi Kimata, Norimasa Sasabe, Kensuke Kurita, Yuichi Yamasaki, Chihiro Tabata, Yuichi Yokoyama, Yoshinori Kotani, Muhammad Ikhlas, Takahiro Tomita, Kenta Amemiya, Hiroyuki Nojiri, Satoru Nakatsuji, Takashi Koretsune, Hironori Nakao, Taka hisa Arima, Tetsuya Nakamura

    Nature Communications　12　(1)　2021/12

    DOI： 10.1038/s41467-021-25834-7 　

    eISSN： 2041-1723

  64. High-field soft-x-ray dichroism of a hard ferrimagnet with easy-plane anisotropy

    Sh. Yamamoto, D. I. Gorbunov, I. F. Diaz-Ortega, A. Miyata, T. Kihara, Y. Kotani, T. Nakamura, N. V. Mushnikov, A. V. Andreev, H. Nojiri, J. Wosnitza

    Physical Review B　104　(6)　2021/08/04

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.104.064405 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  65. Combination of optical transitions of polarons with Rashba effect in methylammonium lead trihalide perovskites under high magnetic fields

    Y. H. Shin, Halim Choi, C. Park, D. Park, M. S. Jeong, H. Nojiri, Z. Yang, Y. Kohama, Yongmin Kim

    Physical Review B　104　(3)　2021/07/15

    Publisher: American Physical Society

    DOI： 10.1103/PhysRevB.104.035205 　

    ISSN： 2469-9969 2469-9950

  66. Ultrastrong magnon–magnon coupling dominated by antiresonant interactions International-journal International-coauthorship Peer-reviewed

    Takuma Makihara, Kenji Hayashida, G. Timothy Noe II, Xinwei Li, Nicolas Marquez Peraca, Xiaoxuan Ma, Zuanming Jin, Wei Ren, Guohong Ma, Ikufumi Katayama, Jun Takeda, Hiroyuki Nojiri, Dmitry Turchinovich, Shixun Cao, Motoaki Bamba, Junichiro Kono

    Nature Communications　12　3115　2021/05/25

    Publisher: Springer Nature

    DOI： 10.1038/s41467-021-23159-z 　

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    Exotic quantum vacuum phenomena are predicted in cavity quantum electrodynamics (QED) systems with ultrastrong light-matter interactions. Their ground states are predicted to be vacuum squeezed states with suppressed quantum fluctuations. The source of such phenomena are antiresonant terms in the Hamiltonian, yet antiresonant interactions are typically negligible compared to resonant interactions in light-matter systems. We report an unusual coupled matter-matter system of magnons that can simulate a unique cavity QED Hamiltonian with coupling strengths that are easily tunable into the ultrastrong coupling regime and with dominant antiresonant terms. We found a novel regime where vacuum Bloch-Siegert shifts, the hallmark of antiresonant interactions, greatly exceed analogous frequency shifts from resonant interactions. Further, we theoretically explored the system's ground state and calculated up to 5.9 dB of quantum fluctuation suppression. These observations demonstrate that magnonic systems provide an ideal platform for simulating exotic quantum vacuum phenomena predicted in ultrastrongly coupled light-matter systems.

  67. A giant spin molecule with ninety-six parallel unpaired electrons

    Lei Qin, Hao-Lan Zhang, Yuan-Qi Zhai, Hiroyuki Nojiri, Christian Schröder, Yan-Zhen Zheng

    iScience　24　(4)　2021/04/23

    Publisher: Elsevier Inc.

    DOI： 10.1016/j.isci.2021.102350 　

    ISSN： 2589-0042

  68. Coupled spin- 12 antiferromagnetic chain Cs2LiRuCl6 with partially disordered crystal lattice Peer-reviewed

    Kazumitsu Watanabe, Nobuyuki Kurita, Hidekazu Tanaka, Haruki Sugiyama, Hidehiro Uekusa, Ismael F. Diaz-Ortega, Hiroyuki Nojiri

    Physical Review B　103　(6)　2021/02/11

    Publisher: American Physical Society ({APS})

    DOI： 10.1103/physrevb.103.064419 　

    ISSN： 2469-9969

  69. Element-specific field-induced spin reorientation and tetracritical point in MnCr2S4 Peer-reviewed

    Sh. Yamamoto, H. Suwa, T. Kihara, T. Nomura, Y. Kotani, T. Nakamura, Y. Skourski, S. Zherlitsyn, L. Prodan, V. Tsurkan, H. Nojiri, A. Loidl, J. Wosnitza

    Physical Review B　103　(2)　2021/01/25

    Publisher: American Physical Society ({APS})

    DOI： 10.1103/physrevb.103.l020408 　

    ISSN： 2469-9969

    eISSN： 2469-9969

  70. High-field spin-flop state in green dioptase Peer-reviewed

    O. Prokhnenko, G. Marmorini, S. E. Nikitin, D. Yamamoto, A. Gazizulina, M. Bartkowiak, A. N. Ponomaryov, S. A. Zvyagin, H. Nojiri, I. F. D{\'{\i } }az-Ortega, L. M. Anovitz, A. I. Kolesnikov, A. Podlesnyak

    Physical Review B　103　(1)　2021/01/19

    Publisher: American Physical Society ({APS})

    DOI： 10.1103/physrevb.103.014427 　

    ISSN： 2469-9969

    eISSN： 2469-9969

  71. Bound spinon excitations in the spin- 12 anisotropic triangular antiferromagnet Ca3ReO5Cl2 Peer-reviewed

    Kazuhiro Nawa, Daigorou Hirai, Maiko Kofu, Kenji Nakajima, Ryo Murasaki, Satoshi Kogane, Motoi Kimata, Hiroyuki Nojiri, Zenji Hiroi, Taku J. Sato

    Physical Review Research　2　(4)　2020/10/23

    Publisher: American Physical Society ({APS})

    DOI： 10.1103/physrevresearch.2.043121 　

    ISSN： 2643-1564

    eISSN： 2643-1564

  72. Crystal Structure and Magnetic Properties of the Breathing Kagome Ising Antiferromagnet Yb3Ni11Ge4.63 Peer-reviewed

    Mitsuru Takahashi, Kazuhiro Nawa, Daisuke Okuyama, Hiroyuki Nojiri, Matthias D. Frontzek, Maxim Avdeev, Masahiro Yoshida, Daichi Ueta, Hideki Yoshizawa, Taku J. Sato

    Journal of the Physical Society of Japan　89　(9)　094704-094704　2020/09/15

    Publisher: Physical Society of Japan

    DOI： 10.7566/jpsj.89.094704 　

    ISSN： 1347-4073

    eISSN： 1347-4073

  73. Single-Molecule Toroic Design through Magnetic Exchange Coupling

    Hao-Lan Zhang, Yuan-Qi Zhai, Lei Qin, Liviu Ungur, Hiroyuki Nojiri, Yan-Zhen Zheng

    Matter　2　(6)　1481-1493　2020/06

    Publisher: Elsevier {BV}

    DOI： 10.1016/j.matt.2020.02.021 　

    ISSN： 2590-2385

  74. Element- and orbital-selective magnetic coherent rotation at the first-order phase transition of a hard uniaxial ferrimagnet

    Sh. Yamamoto, D. I. Gorbunov, H. Akai, H. Yasumura, Y. Kotani, T. Nakamura, T. Kato, N. V. Mushnikov, A. V. Andreev, H. Nojiri, J. Wosnitza

    Physical Review B　101　(17)　2020/05/19

    Publisher: American Physical Society ({APS})

    DOI： 10.1103/physrevb.101.174430 　

    ISSN： 2469-9969

  75. Observation of Ultrastrong Magnon-Magnon Coupling in YFeO<inf>3</inf> using Terahertz Magnetospectroscopy Peer-reviewed

    Takuma Makihara, G. Timothy Noe, Xinwei Li, Kenji Hayashida, Nicolas Marquez Peraca, Kevin Tian, Xiaoxuan Ma, Zuanming Jin, Wei Ren, Guohong Ma, Shixun Cao, Ikufumi Katayama, Jun Takeda, Dmitry Turchinovich, Hiroyuki Nojiri, Motoaki Bamba, Junichiro Kono

    Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS　2020-May　2020/05

    ISSN： 1092-8081

  76. The Forced Magnetostrictions and Magnetic Properties of Ni2MnX (X = In, Sn) Ferromagnetic Heusler Alloys Peer-reviewed

    Takuo Sakon, Junya Yamazaki, Takumi Komori, Takeshi Kanomata, Yasuo Narumi, Masayuki Hagiwara, Hiroyuki Nojiri, Yoshiya Adachi

    Materials　13　(9)　2017-2017　2020/04/25

    Publisher: {MDPI} {AG}

    DOI： 10.3390/ma13092017 　

    ISSN： 1996-1944

    eISSN： 1996-1944

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    <jats:p>Experimental studies into the forced magnetostriction, magnetization, and temperature dependence of permeability in Ni2MnIn and Ni2MnSn ferromagnetic Heusler alloys were performed according to the spin fluctuation theory of itinerant ferromagnetism proposed by Takahashi. We investigated the magnetic field (H) dependence of magnetization (M) at the Curie temperature TC, and at T = 4.2 K, which concerns the ground state of the ferromagnetic state. The M-H result at TC was analyzed by means of the H versus M5 dependence. At 4.2 K, it was investigated by means of an Arrott plot (H/M vs. M2) according to Takahashi’s theory. As for Ni2MnIn and Ni2MnSn, the spin fluctuation parameters in k-space (momentum space, TA) and that in energy space (frequency space, T0) obtained at TC and 4.2 K were almost the same. The average values obtained at TC and 4.2 K were TA = 342 K, T0 = 276 K for Ni2MnIn and TA = 447 K, T0 = 279 K for Ni2MnSn, respectively. The forced magnetostriction at TC was also investigated. The forced linear magnetostriction (ΔL/L) and the forced volume magnetostriction (ΔV/V) were proportional to M4, which followed Takahashi’s theory. We compared the forced volume magnetostriction ΔV/V and mechanical parameter, bulk modulus K. ΔV/V is inversely proportional to K. We also discuss the spin polarization of Ni2MnIn and other magnetic Heusler alloys. The pC/pS of Ni2MnIn was 0.860. This is comparable with that of Co2MnGa, which is a famous half-metallic alloy.</jats:p>

  77. Tuning magnetic anisotropy by the π-bonding features of the axial ligands and the electronic effects of gold(i) atoms in 2D {Co(L)2[Au(CN)2]2}n metal–organic frameworks with field-induced single-ion magnet behaviour

    Mar{\'{\i } }a A. Palacios, Ismael F. D{\'{\i } }az-Ortega, Hiroyuki Nojiri, Elizaveta A. Suturina, Mykhaylo Ozerov, J. Krzystek, Enrique Colacio

    Inorganic Chemistry Frontiers　7　(23)　4611-4630　2020

    Publisher: Royal Society of Chemistry ({RSC})

    DOI： 10.1039/d0qi00996b 　

    ISSN： 2052-1553

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    <p>AuI atoms play an important role in determining the anisotropy of CoII nodes in 2D AuI–CoII field-induced SIMs.</p>

  78. A Ferromagnetically Coupled Octanuclear Manganese(III) Cluster: A Single-Molecule Magnet with a Spin Ground State of S = 16

    Shiga, T., Nojiri, H., Oshio, H.

    Inorganic Chemistry　59　(7)　2020

    DOI： 10.1021/acs.inorgchem.9b03343 　

  79. The effect of the electronic structure and flexibility of the counteranions on magnetization relaxation in [Dy(L)<inf>2</inf>(H<inf>2</inf>O)<inf>5</inf>]3+ (L = phosphine oxide derivative) pentagonal bipyramidal SIMs

    Diáz-Ortega, I.F., Herrera, J.M., Dey, S., Nojiri, H., Rajaraman, G., Colacio, E.

    Inorganic Chemistry Frontiers　7　(3)　689-699　2020

    Publisher: Royal Society of Chemistry ({RSC})

    DOI： 10.1039/c9qi01412h 　

  80. Magnetostriction of Ni2MnGa tupe Ferromagnetic Heusler Alloys Invited Peer-reviewed

    Takuo Sakon, Yuushi Yamasaki, Yoshiya Adachi, Hiroyuki Nojiri, Takeshi Kanomata

    Materia Japan　59　(1)　21-25　2020/01

  81. The Characteristic Properties of Magnetostriction and Magneto-Volume Effects of Ni2MnGa-Type Ferromagnetic Heusler Alloys Peer-reviewed

    Takuo Sakon, Yuushi Yamasaki, Hiroto Kodama, Takeshi Kanomata, Hiroyuki Nojiri, Yoshiya Adachi

    Materials　12　(22)　3655　2019/11

  82. Triplet Diradical-Cation Salts Consisting of the Phenothiazine Radical Cation and a Nitronyl Nitroxide Peer-reviewed

    Tahara, Takuma, Suzuki, Shuichi, Kozaki, Masatoshi, Shiomi, Daisuke, Sugisaki, Kenji, Sato, Kazunobu, Takui, Takeji, Miyake, Yota, Hosokoshi, Yuko, Nojiri, Hiroyuki, Okada, Keiji

    Chem.-Eur. J.　25　(29)　7201-7209　2019/05

  83. Development of Compact High Field Pulsed Magnet System for New Sample Environment Equipment at MLF in J-PARC Peer-reviewed

    M. Watanabe, H. Nojiri, S. Itoh, S. Ohira-Kawamura, T. Kihara, T. Masuda, T. Sahara, M. Soda, R. Takahashi

    JPS Conf. Proc.　25　011024-011024　2019/03/28

    Publisher: Journal of the Physical Society of Japan

    DOI： 10.7566/jpscp.25.011024 　

  84. Ultrastrong coupling of two terahertz magnon modes in yFeO<inf>3</inf> in pulsed high magnetic fields

    G. T. Noe, T. Makihara, X. Li, K. Hayashida, N. Marquez Peraca, K. Tian, N. Yuan, J. Zhang, Z. Jin, W. Ren, G. Ma, S. Cao, I. Katayama, J. Takeda, D. Turchinovich, H. Nojiri, M. Bamba, J. Kono

    Optics InfoBase Conference Papers　Part F154-TSA 2019　2019

  85. Pulsed magnet system at MLF in J-PARC Peer-reviewed

    Watanabe, M., Nojiri, H.

    J. Neutron Res.　21　39-45　2019/01

  86. Magnetic ground state and magnetic excitations in black dioptase Cu6Si6 O18 Peer-reviewed

    Podlesnyak, A., Prokhnenko, O., Nikitin, S.E., Kolesnikov, A.I., Matsuda, M., Dissanayake, S.E., Prisk, T.R., Nojiri, H., Díaz-Ortega, I.F., Kidder, M.K., Anovitz, L.M.

    Physical Review B　100　(18)　184401　2019

    DOI： 10.1103/PhysRevB.100.184401 　

  87. Magnetic ground state of the frustrated spin- 12 chain compound β-TeVO4 at high magnetic fields Peer-reviewed

    Pregelj, M., Zorko, A., Klanjšek, M., Zaharko, O., White, J.S., Prokhnenko, O., Bartkowiak, M., Nojiri, H., Berger, H., Arčon, D.

    Physical Review B　100　(9)　94433　2019

    DOI： 10.1103/PhysRevB.100.094433 　

  88. Development and application of 2.5 GPa-25 T high-pressure high-field electron spin resonance system using a cryogen-free superconducting magnet Peer-reviewed

    T. Sakurai, S. Kimura, M. Kimata, H. Nojiri, S. Awaji, S. Okubo, H. Ohta, Y. Uwatoko, K. Kudo, Y. Koike

    Journal of Magnetic Resonance　296　1-4　2018/11

    DOI： 10.1016/j.jmr.2018.08.005 　

    ISSN： 1090-7807

    eISSN： 1096-0856

  89. Time and Magnetic Field Variations of Magnetic Structure in the Triangular Lattice Magnet Ca3Co2O6 Peer-reviewed

    Motoya Kiyoichiro, Kihara Takumi, Nojiri Hiroyuki, Uwatoko Yoshiya, Matsuda Masaaki, Hong Tao

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　87　(11)　114703　2018/11

    DOI： 10.7566/JPSJ.87.114703 　

    ISSN： 0031-9015

  90. A Chiral Bipyrimidine-Bridged Dy-2 SMM: A Comparative Experimental and Theoretical Study of the Correlation Between the Distortion o f the DyO6N2 Coordination Sphere and the Anisotropy Barrier Peer-reviewed

    Diaz-Ortega Ismael F, Manuel Herrera Juan, Reyes Carmona Alvaro, Ramon Galan-Mascaros Jose, Dey Sourav, Nojiri Hiroyuki, Rajaraman Gopalan, Colacio Enrique

    FRONTIERS IN CHEMISTRY　6　537　2018/11

    DOI： 10.3389/fchem.2018.00537 　

  91. Degenerate ground state in the classical pyrochlore antiferromagnet Na3Mn(CO3)(2)Cl Peer-reviewed

    Nawa Kazuhiro, Okuyama Daisuke, Avdeev Maxim, Nojiri Hiroyuki, Yoshida Masahiro, Ueta Daichi, Yoshizawa Hideki, Sato Taku J

    PHYSICAL REVIEW B　98　(14)　144426　2018/10

    Publisher: American Physical Society (APS)

    DOI： 10.1103/PhysRevB.98.144426 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  92. Rationalization of single-molecule magnet behavior in a three-coordinate Fe(III) complex with a high-spin state (S=5/2) Peer-reviewed

    Ge Ning, Zhai Yuan-Qi, Deng Yi-Fei, Ding You-Song, Wu Tao, Wang Zhen-Xing, Ouyang Zhongwen, Nojiri Hiroyuki, Zheng Yan-Zhen

    INORGANIC CHEMISTRY FRONTIERS　5　2486-2492　2018/10

    DOI： 10.1039/c8qi00701b 　

  93. Magnetic Field-Induced Strain of Metamagnetic Heusler Alloy Ni41Co9Mn31.5Ga18.5 Peer-reviewed

    Takuo Sakon, Naoki Fujimoto, Sho Saruki, Takeshi Kanomata, Hiroyuki Nojiri, Yoshiya Adachi

    "Shape Memory Materials", IntechOpen, DOI 10.5772/intechopen.76291　1-16　2018/09

  94. Slow Magnetic Relaxation in a Palladium-Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion Peer-reviewed

    David C. Izuogu, Takefumi Yoshida, Haitao Zhang, Goulven Cosquer, Keiichi Katoh, Shuhei Ogata, Miki Hasegawa, Hiroyuki Nojiri, Marko Damjanovic, Wolfgang Wernsdorfer, Tomoya Uruga, Toshiaki Ina, Brian K. Breedlove, Masahiro Yamashita

    Chem. Eur. J.　24　9285-9294　2018/07

    DOI： 10.1002/chem.201800699 　

  95. Forced magnetostriction of ferromagnetic Heusler alloy Ni2MnGa at the Curie temperature Peer-reviewed

    T. Sakon, Y. Hayashi, N. Fujimoto, T. Kanomata, H. Nojiri, Y. Adachi

    Journal of Applied Physics　123　(21)　213902-1-4　2018/06/07

    Publisher: American Institute of Physics Inc.

    DOI： 10.1063/1.5036558 　

    ISSN： 1089-7550 0021-8979

  96. Designing a Dy2 Single-Molecule Magnet with Two Well-Differentiated Relaxation Processes by Using a Nonsymmetric Bis-bidentate Bipyrimidine- N-Oxide Ligand: A Comparison with Mononuclear Counterparts Peer-reviewed

    Ismael F. Díaz-Ortega, Juan Manuel Herrera, Daniel Aravena, Eliseo Ruiz, Tulika Gupta, Gopalan Rajaraman, H. Nojiri, Enrique Colacio

    Inorganic Chemistry　57　(11)　6362-6375　2018/06/04

    Publisher: American Chemical Society

    DOI： 10.1021/acs.inorgchem.8b00427 　

    ISSN： 1520-510X 0020-1669

  97. Coherent terahertz excitation of magnons to 30 T Peer-reviewed

    G. T. Noe, X. Li, J. A. Horowitz, K. Yoshioka, F. Katsutani, N. Yuan, M. Xiang, K. Xu, Z. Jin, S. Cao, H. Nojiri, I. Katayama, J. Takeda, D. Turchinovich, J. Kono

    Optics InfoBase Conference Papers　2018　(1)　1-2　2018

    Publisher: OSA - The Optical Society

    DOI： 10.1364/CLEO_QELS.2018.FF2D.1 　

  98. Quantum Monte Carlo Simulations and High-Field Magnetization Studies of Antiferromagnetic Interactions in a Giant Hetero-Spin Ring Peer-reviewed

    Lei Qin, Jared Singleton, Wei-Peng Chen, Hiroyuki Nojiri, Larry Engelhardt, Richard E. P. Winpenny, Yan-Zhen Zheng

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　56　(52)　16571-16574　2017/12

    DOI： 10.1002/anie.201709650 　

    ISSN： 1433-7851

    eISSN： 1521-3773

  99. Topological Self-Assembly of Highly Symmetric Lanthanide Clusters: A Magnetic Study of Exchange-Coupling "Fingerprints" in Giant Gadolinium(III) Cages Peer-reviewed

    Lei Qin, Guo-Jun Zhou, You-Zhu Yu, Hiroyuki Nojiri, Christian Schroder, Richard E. P. Winpenny, Yan-Zhen Zheng

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　139　(45)　16405-16411　2017/11

    DOI： 10.1021/jacs.7b09996 　

    ISSN： 0002-7863

  100. The OVAL experiment: a new experiment to measure vacuum magnetic birefringence using high repetition pulsed magnets Peer-reviewed

    Xing Fan, Shusei Kamioka, Toshiaki Inada, Takayuki Yamazaki, Toshio Namba, Shoji Asai, Junko Omachi, Kosuke Yoshioka, Makoto Kuwata-Gonokami, Akira Matsuo, Koushi K. Awaguchi, Koichi Kindo, Hiroyuki Nojiri

    EUROPEAN PHYSICAL JOURNAL D　71　(11)　308-1-10　2017/11

    DOI： 10.1140/epjd/e2017-80290-7 　

    ISSN： 1434-6060

    eISSN： 1434-6079

  101. Chemical reaction within a compact non-porous crystal containing molecular clusters without the loss of crystallinity Peer-reviewed

    Ming Zhang, Tao Yang, Zhenxing Wang, Xiong-Feng Ma, Yuexing Zhang, Samuel M. Greer, Sebastian A. Stoian, Zhong-Wen Ouyang, Hiroyuki Nojiri, Mohamedally Kurmoo, Ming-Hua Zeng

    CHEMICAL SCIENCE　8　(8)　5356-5361　2017/08

    DOI： 10.1039/c7sc01041a 　

    ISSN： 2041-6520

    eISSN： 2041-6539

  102. Collective and local excitations in Ba2CoTeO6: A composite system of a spin-1/2 triangular-lattice Heisenberg antiferromagnet and a honeycomb-lattice J(1) - J(2) Ising antiferromagnet Peer-reviewed

    Purintorn Chanlert, Nobuyuki Kurita, Hidekazu Tanaka, Motoi Kimata, Hiroyuki Nojiri

    PHYSICAL REVIEW B　96　(6)　064419-1-6　2017/08

    DOI： 10.1103/PhysRevB.96.064419 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  103. Spin-1/2 Quantum Antiferromagnet on a Three-Dimensional Honeycomb Lattice Formed by a New Organic Biradical F4BIPBNN Peer-reviewed

    Naoki Amaya, Toshio Ono, Yuta Oku, Hironori Yamaguchi, Akira Matsuo, Koichi Kindo, Hiroyuki Nojiri, Fernando Palacio, Javier Campo, Yuko Hosokoshi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　86　(7)　074706-1-7　2017/07

    DOI： 10.7566/JPSJ.86.074706 　

    ISSN： 0031-9015

  104. Signatures of a magnetic field-induced unconventional nematic liquid in the frustrated and anisotropic spin-chain cuprate LiCuSbO4 Peer-reviewed

    H. -J. Grafe, S. Nishimoto, M. Iakovleva, E. Vavilova, L. Spillecke, A. Alfonsov, M. -I. Sturza, S. Wurmehl, H. Nojiri, H. Rosner, J. Richter, U. K. Roessler, S. -L. Drechsler, V. Kataev, B. Buechner

    SCIENTIFIC REPORTS　7　6720-1-16　2017/07

    DOI： 10.1038/s41598-017-06525-0 　

    ISSN： 2045-2322

  105. Design of a Family of Ln(3) Triangles with the HAT Ligand (1,4,5,8,9,12-Hexaazatriphenylene): Single-Molecule Magnetism Peer-reviewed

    Ismael F. Diaz-Ortega, Juan Manuel Herrera, Tulika Gupta, Gopalan Rajaraman, Hiroyuki Nojiri, Enrique Colacio

    INORGANIC CHEMISTRY　56　(10)　5594-5610　2017/05

    DOI： 10.1021/acs.inorgchem.6b03031 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  106. Field-Induced Slow Magnetic Relaxation of Gd-III Complex with a Pt-Gd Heterometallic Bond Peer-reviewed

    Takefumi Yoshida, Goulven Cosquer, David Chukwuma Izuogu, Hiroyoshi Ohtsu, Masaki Kawano, Yanhua Lan, Wolfgang Wernsdorfer, Hiroyuki Nojiri, Brian K. Breedlove, Masahiro Yamashita

    CHEMISTRY-A EUROPEAN JOURNAL　23　(19)　4551-4556　2017/04

    DOI： 10.1002/chem.201700886 　

    ISSN： 0947-6539

    eISSN： 1521-3765

  107. Search for Two-Photon Interaction with Axionlike Particles Using High-Repetition Pulsed Magnets and Synchrotron X Rays Peer-reviewed

    T. Inada, T. Yamazaki, T. Namba, S. Asai, T. Kobayashi, K. Tamasaku, Y. Tanaka, Y. Inubushi, K. Sawada, M. Yabashi, T. Ishikawa, A. Matsuo, K. Kawaguchi, K. Kindo, H. Nojiri

    PHYSICAL REVIEW LETTERS　118　(7)　071803-1-6　2017/02

    DOI： 10.1103/PhysRevLett.118.071803 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  108. Effect of Amorphous Region on Magnetic Orientation of Poly(lactic acid) Blend Films with Different Molecular Weight

    Nakayama R., Ikake H., Kurita K., Shimizu S., Kurumi S., Suzuki K., Takahashi K., Nojiri H.

    Journal of the Magnetics Society of Japan　41　(3)　66-69　2017

    Publisher: The Magnetics Society of Japan

    DOI： 10.3379/msjmag.1703R001 　

    ISSN： 2432-0250

    More details Close

    <p>The magnetic-field-induced blend films, poly(L-lactide)(PLLA10) (Mn = 1.0 × 105) and poly(DL-lactide) (Mw = 1.0 × 104 (PDLLA1) and 1.0 × 105 (PDLLA10)) were prepared in isothermal process under the magnetic-field 10 T. The effects of amorphous region, i.e., molecular weight of PDLLA effect on crystallization and orientation of PLLA in the films were investigated using wide-angle X-ray diffraction and polarizing microscopy. The crystallinity of each films showed 60% at crystallization growth time tc = 30 hrs irrespective of PDLLA molecular weight. The degree of orientation of PLLA10/PDLLA10 film increased with increasing tc. We concluded that the blending with amorphous high-molecular-weigh PDLLA and crystallization in an applied high magnetic field is effective to achieve the PLLA film that has higher crystallinity and orientation.</p>

  109. Anisotropic Change in the Magnetic Susceptibility of a Dynamic Single Crystal of a Cobalt(II) Complex Peer-reviewed

    Zi-Shuo Yao, Shu-Qi Wu, Yasutaka Kitagawa, Sheng-Qun Su, You-Gui Huang, Guo-Ling Li, Zhong-Hai Ni, Hiroyuki Nojiri, Yoshihito Shiota, Kazunari Yoshizawa, Soonchul Kang, Shinji Kanegawa, Osamu Sato

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　56　(3)　717-721　2017/01

    DOI： 10.1002/anie.201606165 　

    ISSN： 1433-7851

    eISSN： 1521-3773

  110. Single-shot terahertz time-domain spectroscopy in pulsed high magnetic fields Peer-reviewed

    G. Timothy Noe, Ikufumi Katayama, Fumiya Katsutani, James J. Allred, Jeffrey A. Horowitz, David M. Sullivan, Qi Zhang, Fumiya Sekiguchi, Gary L. Woods, Matthias C. Hoffmann, Hiroyuki Nojiri, Jun Takeda, Junichiro Kono

    OPTICS EXPRESS　24　(26)　30328-30337　2016/12

    DOI： 10.1364/OE.24.030328 　

    ISSN： 1094-4087

  111. Evidence of Charge Transfer and Orbital Magnetic Moment in Multiferroic CuFeO2 Peer-reviewed

    Yasuo Narumi, Tetsuya Nakamura, Hidekazu Ikeno, Noriki Terada, Takayuki Morioka, Kota Saito, Hideaki Kitazawa, Koichi Kindo, Hiroyuki Nojiri

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　85　(11)　114705-1-6　2016/11

    DOI： 10.7566/JPSJ.85.114705 　

    ISSN： 0031-9015

  112. Magnetocaloric and Magnetic Properties of Meta-Magnetic Heusler Alloy Ni41Co9Mn31.5Ga18.5 Peer-reviewed

    T. Sakon, T. Kitaoka, K. Tanaka, K. Nakagawa, H. Nojiri, Y. Adachi, T. Kanomata

    Progress in Metallic Alloys　265-287　2016/10/19

    DOI： 10.5772/64375 　

  113. Repeating pulsed magnet system for axion-like particle searches and vacuum birefringence experiments Peer-reviewed

    T. Yamazaki, T. Inada, T. Namba, S. Asai, T. Kobayashi, A. Matsuo, K. Kindo, H. Nojiri

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT　833　122-126　2016/10

    DOI： 10.1016/j.nima.2016.07.031 　

    ISSN： 0168-9002

    eISSN： 1872-9576

  114. Microscopic Examinations of Co Valences and Spin States in Electron-Doped LaCoO3 Peer-reviewed

    Keisuke Tomiyasu, Syun-Ichi Koyama, Masanori Watahiki, Mika Sato, Kazuki Nishihara, Yuki Takahashi, Mitsugi Onodera, Kazuaki Iwasa, Tsutomu Nojima, Hiroyuki Nojiri, Jun Okamoto, Di-Jing Huang, Yuuichi Yamasaki, Hironori Nakao, Youichi Murakami

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　85　(9)　094702-1-6　2016/09

    DOI： 10.7566/JPSJ.85.094702 　

    ISSN： 0031-9015

  115. Studies on the Magnetic Ground State of a Spin Mobius Strip Peer-reviewed

    Graham N. Newton, Norihisa Hoshino, Takuto Matsumoto, Takuya Shiga, Motohiro Nakano, Hiroyuki Nojiri, Wolfgang Wernsdorfer, Yuji Furukawa, Hiroki Oshio

    CHEMISTRY-A EUROPEAN JOURNAL　22　(40)　14205-14212　2016/09

    DOI： 10.1002/chem.201602439 　

    ISSN： 0947-6539

    eISSN： 1521-3765

  116. Robust singlet dimers with fragile ordering in two-dimensional honeycomb lattice of Li2RuO3 Peer-reviewed

    Junghwan Park, Teck-Yee Tan, D. T. Adroja, A. Daoud-Aladine, Seongil Choi, Deok-Yong Cho, Sang-Hyun Lee, Jiyeon Kim, Hasung Sim, T. Morioka, H. Nojiri, V. V. Krishnamurthy, P. Manuel, M. R. Lees, S. V. Streltsov, D. I. Khomskii, Je-Geun Park

    SCIENTIFIC REPORTS　6　25238-1-8　2016/05

    DOI： 10.1038/srep25238 　

    ISSN： 2045-2322

  117. Trigonal Bipyramid Ni3Cl3O2 Cluster Showing the High-Spin S=3 Ground State with Uniaxial Magnetic Anisotropy Peer-reviewed

    Yumi Ida, Hiroyuki Nojiri, Takayuki Ishida

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　89　(2)　226-236　2016/02

    DOI： 10.1246/bcsj.20150315 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  118. Copper Keplerates: High-Symmetry Magnetic Molecules Peer-reviewed

    Maria A. Palacios, Eufemio Moreno Pineda, Sergio Sanz, Ross Inglis, Mateusz B. Pitak, Simon J. Coles, Marco Evangelisti, Hiroyuki Nojiri, Christian Heesing, Euan K. Brechin, Juergen Schnack, Richard E. P. Winpenny

    CHEMPHYSCHEM　17　(1)　55-60　2016/01

    DOI： 10.1002/cphc.201500956 　

    ISSN： 1439-4235

    eISSN： 1439-7641

  119. Electronic Structure of a Mixed-Metal Fluoride-Centered Triangle Complex: A Potential Qubit Component Peer-reviewed

    James P. S. Walsh, Sarah B. Meadows, Alberto Ghirri, Fabrizio Moro, Martin Jennings, William F. Smith, Darren M. Graham, Takumi Kihara, Hiroyuki Nojiri, Inigo J. Vitorica-Yrezabal, Grigore A. Timco, David Collison, Eric J. L. McInnes, Richard E. P. Winpenny

    INORGANIC CHEMISTRY　54　(24)　12019-12026　2015/12

    DOI： 10.1021/acs.inorgchem.5b01898 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  120. Relationship between Torsion and Anisotropic Exchange Coupling in a Tb-III-Radical-Based Single-Molecule Magnet Peer-reviewed

    Michael L. Baker, Takuya Tanaka, Rina Murakami, Seiko Ohira-Kawamura, Kenji Nakajima, Takayuki Ishida, Hiroyuki Nojiri

    INORGANIC CHEMISTRY　54　(12)　5732-5738　2015/06

    DOI： 10.1021/acs.inorgchem.5b00300 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  121. Spin-stripe phase in a frustrated zigzag spin-1/2 chain Peer-reviewed

    M. Pregelj, A. Zorko, O. Zaharko, H. Nojiri, H. Berger, L. C. Chapon, D. Arcon

    NATURE COMMUNICATIONS　6　7255-1-8　2015/06

    DOI： 10.1038/ncomms8255 　

    ISSN： 2041-1723

  122. Single-molecule magnet involving strong exchange coupling in terbium(III) complex with 2,2 '-bipyridin-6-yl tert-butyl nitroxide Peer-reviewed

    Takuya Kanetomo, Shunsuke Yoshii, Hiroyuki Nojiri, Takayuki Ishida

    INORGANIC CHEMISTRY FRONTIERS　2　(9)　860-866　2015

    DOI： 10.1039/c5qi00098j 　

    ISSN： 2052-1553

  123. Rapid scanning terahertz time-domain magnetospectroscopy with a table-top repetitive pulsed magnet Peer-reviewed

    G. Timothy Noe, Qi Zhang, Joseph Lee, Eiji Kato, Gary L. Woods, Hiroyuki Nojiri, Junichiro Kono

    APPLIED OPTICS　53　(26)　5850-5855　2014/09

    DOI： 10.1364/AO.53.005850 　

    ISSN： 1559-128X

    eISSN： 2155-3165

  124. Correlation among Charge, Dielectric, and Magnetic Properties in Electron-transfer-type Spin-crossover Systems Peer-reviewed

    Satoshi Matsuzawa, Kou Tazoe, Hiroyuki Nojiri, Fumichika Iijima, Hiroki Oshio

    CHEMISTRY LETTERS　43　(7)　1173-1175　2014/07

    DOI： 10.1246/cl.140274 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  125. Magnetic Properties of the Ferromagnetic Shape Memory Alloys Ni50+xMn27-xGa23 in Magnetic Fields Peer-reviewed

    Takuo Sakon, Kohei Otsuka, Junpei Matsubayashi, Yuushi Watanabe, Hironori Nishihara, Kenta Sasaki, Satoshi Yamashita, Rie Y. Umetsu, Hiroyuki Nojiri, Takeshi Kanomata

    MATERIALS　7　(5)　3715-3734　2014/05

    DOI： 10.3390/ma7053715 　

    ISSN： 1996-1944

  126. Terahertz Time-Domain Magnetospectroscopy Using a Table-Top Repetitive Pulsed Magnet Peer-reviewed

    G. T. Noe, Q. Zhang, J. Lee, E. Kato, H. Nojiri, G. L. Woods, J. Kono

    2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)　2014

    DOI： 10.1364/CLEO_QELS.2014.FTu1B.8 　

    ISSN： 2160-9020

  127. Magnetic study on radical-gadolinium(III) complexes. Relationship between the exchange coupling and coordination structure Peer-reviewed

    Takayuki Ishida, Rina Murakami, Takuya Kanetomo, Hiroyuki Nojiri

    POLYHEDRON　66　183-187　2013/12

    DOI： 10.1016/j.poly.2013.04.004 　

    ISSN： 0277-5387

  128. X-ray Magnetic Circular Dichroism Investigation of the Electron Transfer Phenomena Responsible for Magnetic Switching in a Cyanide-Bridged [CoFe] Chain Peer-reviewed

    Michael L. Baker, Yasutaka Kitagawa, Tetsuya Nakamura, Kou Tazoe, Yasuo Narumi, Yoshinori Kotani, Fumichika Iijima, Graham N. Newton, Mitsutaka Okumura, Hiroki Oshio, Hiroyuki Nojiri

    INORGANIC CHEMISTRY　52　(24)　13956-13962　2013/12

    DOI： 10.1021/ic402580n 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  129. A table-top, repetitive pulsed magnet for nonlinear and ultrafast spectroscopy in high magnetic fields up to 30 T Peer-reviewed

    G. Timothy Noe, Hiroyuki Nojiri, Joseph Lee, Gary L. Woods, Jean Leotin, Junichiro Kono

    REVIEW OF SCIENTIFIC INSTRUMENTS　84　(12)　123906-1-7　2013/12

    DOI： 10.1063/1.4850675 　

    ISSN： 0034-6748

    eISSN： 1089-7623

  130. Magnetic entropy and magnetocaloric effect of ferromagnetic Heusler alloys Ni2Mn0.75Cu0.25Ga and Ni2MnGa0.88Cu0.12 Peer-reviewed

    Takuo Sakon, Hitoshi Nagashio, Kenta Sasaki, Seiji Susuga, Keita Endo, Hiroyuki Nojiri, Takeshi Kanomata

    JOURNAL OF ALLOYS AND COMPOUNDS　577　S376-S379　2013/11

    DOI： 10.1016/j.jallcom.2012.04.077 　

    ISSN： 0925-8388

    eISSN： 1873-4669

  131. Slow Relaxation of the Magnetization of an MnIII Single Ion Peer-reviewed

    Ryuta Ishikawa, Ryo Miyamoto, Hiroyuki Nojiri, Brian K. Breedlove, Masahiro Yamashita

    Inorganic Chemistry　52　(15)　8300-8302　2013/08/05

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/ic401351w 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  132. Crystal structure and magnetic properties of the verdazyl biradical m-Ph-V2 forming a ferromagnetic alternating double chain Peer-reviewed

    Kenji Iwase, Hironori Yamaguchi, Toshio Ono, Tokuro Shimokawa, Hiroki Nakano, Akira Matsuo, Koichi Kindo, Hiroyuki Nojiri, Yuko Hosokoshi

    Journal of the Physical Society of Japan　82　(7)　074719-1-6　2013/07

    DOI： 10.7566/JPSJ.82.074719 　

    ISSN： 0031-9015 1347-4073

    eISSN： 1347-4073

  133. Magnetic property of a single crystal of spin-1/2 triple-chain magnet Cu3(OH)4SO4 Peer-reviewed

    Yutaka Fujii, Yuya Ishikawa, Hikomitsu Kikuchi, Yasuo Narumi, Hiroyuki Nojiri, Shigeo Hara, Hirohiko Sato

    Journal of the Korean Physical Society　62　(12)　2054-2058　2013/07

    DOI： 10.3938/jkps.62.2054 　

    ISSN： 0374-4884 1976-8524

  134. Magnetization process and collective excitations in the s=1/2 triangular-lattice heisenberg antiferromagnet Ba3CoSb 2O9 Peer-reviewed

    Takuya Susuki, Nobuyuki Kurita, Takuya Tanaka, Hiroyuki Nojiri, Akira Matsuo, Koichi Kindo, Hidekazu Tanaka

    Physical Review Letters　110　(26)　267201-1-5　2013/06/24

    DOI： 10.1103/PhysRevLett.110.267201 　

    ISSN： 0031-9007 1079-7114

  135. Structural Tailoring Effects on the Magnetic Behavior of Symmetric and Asymmetric Cubane-Type Ni complexes Peer-reviewed

    Alexey N. Ponomaryov, Namseok Kim, Jaewon Hwang, Hiroyuki Nojiri, Johan van Tol, Andrew Ozarowski, Jena Park, Zeehoon Jang, Byoungjin Suh, Sungho Yoon, Kwang-Yong Choi

    CHEMISTRY-AN ASIAN JOURNAL　8　(6)　1152-1159　2013/06

    DOI： 10.1002/asia.201300054 　

    ISSN： 1861-4728

  136. High-Field Magnetization Measurements of Fe2MnSi Peer-reviewed

    Takuo Sakon, Keiichi Koyama, Osamu Kamiya, Satoshi Awaji, Shintaro Nakamura, Tsutomu Nojima, Hiroyuki Nojiri, Kazuo Watanabe, Masahiko Hiroi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　82　(4)　044802-1-4　2013/04

    DOI： 10.7566/JPSJ.82.044802 　

    ISSN： 0031-9015

  137. Barium vanadium silicate BaVSi2O7: A t(2g) counterpart of the Han purple compound Peer-reviewed

    A. Vasiliev, O. Volkova, E. Zvereva, M. Isobe, Y. Ueda, S. Yoshii, H. Nojiri, V. Mazurenko, M. Valentyuk, V. Anisimov, I. Solovyev, R. Klingeler, B. Buechner

    PHYSICAL REVIEW B　87　(13)　134412-1-8　2013/04

    DOI： 10.1103/PhysRevB.87.134412 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  138. Crystal structure and magnetic properties of honeycomb-like lattice antiferromagnet p-BIP-V2 Peer-reviewed

    Hironori Yamaguchi, Shintaro Nagata, Masami Tada, Kenji Iwase, Toshio Ono, Sadafumi Nishihara, Yuko Hosokoshi, Tokuro Shimokawa, Hiroki Nakano, Hiroyuki Nojiri, Akira Matsuo, Koichi Kindo, Takashi Kawakami

    Physical Review B - Condensed Matter and Materials Physics　87　(12)　2013/03/14

    DOI： 10.1103/PhysRevB.87.125120 　

    ISSN： 1098-0121 1550-235X

    eISSN： 1550-235X

  139. A New Family of Trinuclear Nickel(II) Complexes as Single-Molecule Magnets Peer-reviewed

    Rituparna Biswas, Yumi Ida, Michael L. Baker, Saptarshi Biswas, Paramita Kar, Hiroyuki Nojiri, Takayuki Ishida, Ashutosh Ghosh

    CHEMISTRY-A EUROPEAN JOURNAL　19　(12)　3943-3953　2013/03

    DOI： 10.1002/chem.201202795 　

    ISSN： 0947-6539

    eISSN： 1521-3765

  140. Synthesis and magnetic properties of a new series of triangular-lattice magnets, Na2BaMV2O8 (M = Ni, Co, and Mn) Peer-reviewed

    Genki Nakayama, Shigeo Hara, Hirohiko Sato, Yasuo Narumi, Hiroyuki Nojiri

    JOURNAL OF PHYSICS-CONDENSED MATTER　25　(11)　116003-1-8　2013/03

    DOI： 10.1088/0953-8984/25/11/116003 　

    ISSN： 0953-8984

  141. High-field ESR on Light-Induced Transition of Spin Multiplicity in FeCo Complex Peer-reviewed

    S. Yoshii, H. Nojiri, O. Sato

    JOURNAL OF LOW TEMPERATURE PHYSICS　170　(5-6)　383-388　2013/03

    DOI： 10.1007/s10909-012-0793-2 　

    ISSN： 0022-2291

  142. Crystallography and Magnetic field-induced strain by Co doping NiCoMnGa heusler alloy

    Takuo Sakon, Yoshiya Adachi, Rie Umetsu, Hiroyuki Nojiri, Hironori Nishihara, Takeshi Kanomata

    TMS 2013 142nd Annual Meeting and Exhibition, Annual Meeting　967-974　2013/01/01

    Publisher: Wiley Blackwell

    DOI： 10.1002/9781118663547.ch120 　

  143. Magnetic Field-Induced Transition in Co-Doped Ni41Co9Mn31.5Ga18.5 Heusler Alloy Peer-reviewed

    Takuo Sakon, Kenta Sasaki, Daisuke Numakura, Michihito Abe, Hiroyuki Nojiri, Yoshiya Adachi, Takeshi Kanomata

    MATERIALS TRANSACTIONS　54　(1)　9-13　2013

    DOI： 10.2320/matertrans.M2012289 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  144. Superfluorescence from a Dense Electron-Hole Plasma in Pulsed High Magnetic Fields Peer-reviewed

    G. T. Noe, H. Nojiri, J. Leotin, G. L. Woods, A. A. Belyanin, J. Kono

    2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)　2013

    DOI： 10.1364/CLEO_QELS.2013.QM1D.6 　

    ISSN： 2160-9020

  145. Thermal strain and magnetization of the ferromagnetic shape memory alloy Ni52Mn25Ga23 in a magnetic field Peer-reviewed

    T. Sakon, H. Nagashio, K. Sasaki, S. Susuga, D. Numakura, M. Abe, K. Endo, S. Yamashita, H. Nojiri, T. Kanomata

    JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS　74　(1)　158-165　2013/01

    DOI： 10.1016/j.jpcs.2012.09.004 　

    ISSN： 0022-3697

    eISSN： 1879-2553

  146. Basic Concepts of Polarisation Analysis for Neutron Chopper Spectrometer POLANO at J-PARC Peer-reviewed

    K. Ohoyama, T. Yokoo, S. Itoh, J. Suzuki, K. Iwasa, T. J. Sato, H. Kira, Y. Sakaguchi, T. Ino, T. Oku, K. Tomiyasu, M. Matsuura, H. Hiraka, M. Fujita, H. Kimura, T. Sato, J. Suzuki, H. M. Shimizu, T. Arima, M. Takeda, K. Kaneko, M. Hino, S. Muto, H. Nojiri, C. H. Lee, J. G. Park, S. Choi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　82　SA036-1-6　2013/01

    DOI： 10.7566/JPSJS.82SA.SA036 　

    ISSN： 0031-9015

  147. Linear trinuclear Zn(II)-Ce(III)-Zn(II) complex which behaves as a single-molecule magnet Peer-reviewed

    Shiori Hino, Moe Maeda, Kei Yamashita, Yumiko Kataoka, Motohiro Nakano, Tomoo Yamamura, Hiroyuki Nojiri, Maiko Kofu, Osamu Yamamuro, Takashi Kajiwara

    DALTON TRANSACTIONS　42　(8)　2683-2686　2013

    DOI： 10.1039/c2dt32812g 　

    ISSN： 1477-9226

  148. Single-molecule magnet [Tb(hfac)(3)(2pyNO)] (2pyNO=t-butyl 2-pyridyl nitroxide) with a relatively high barrier of magnetization reversal Peer-reviewed

    Rina Murakami, Takayuki Ishida, Shunsuke Yoshii, Hiroyuki Nojiri

    DALTON TRANSACTIONS　42　(38)　13968-13973　2013

    DOI： 10.1039/c3dt51784e 　

    ISSN： 1477-9226

  149. Nonmagnetic impurity effects in the decorated shastry-sutherland compound Cd(Cu1-xZnx)2(BO3)2 (0 ≤ x ≤ 0.2) Peer-reviewed

    S. H. Do, J. W. Hwang, K. Choi, H. Zhou, H. Nojiri

    Journal of the Korean Physical Society　63　(6)　1028-1033　2013

    DOI： 10.3938/jkps.63.1028 　

    ISSN： 0374-4884 1976-8524

  150. Three-way switching in a cyanide-bridged [CoFe] chain Peer-reviewed

    Norihisa Hoshino, Fumichika Iijima, Graham N. Newton, Norifumi Yoshida, Takuya Shiga, Hiroyuki Nojiri, Akiko Nakao, Reiji Kumai, Youichi Murakami, Hiroki Oshio

    NATURE CHEMISTRY　4　(11)　921-926　2012/11

    DOI： 10.1038/NCHEM.1455 　

    ISSN： 1755-4330

    eISSN： 1755-4349

  151. Soft-X-ray Magnetic Circular Dichroism under Pulsed High Magnetic Fields at Eu M-4,M-5 Edges of Mixed Valence Compound EuNi2(Si0.18Ge0.82)(2) Peer-reviewed

    Tetsuya Nakamura, Toko Hirono, Toyohiko Kinoshita, Yasuo Narumi, Misaki Hayashi, Hiroyuki Nojiri, Akihiro Mitsuda, Hirofumi Wada, Kenji Kodama, Koichi Kindo, Akio Kotani

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　81　(10)　103705-1-4　2012/10

    DOI： 10.1143/JPSJ.81.103705 　

    ISSN： 0031-9015

  152. Slow Magnetic Relaxations in Manganese(III) Tetra(meta-fluorophenyl)porphyrin-tetracyanoethenide. Comparison with the Relative Single Chain Magnet ortho Compound Peer-reviewed

    Z. Tomkowicz, M. Rams, M. Balanda, S. Foro, H. Nojiri, Y. Krupskaya, V. Kataev, B. Buechner, S. K. Nayak, J. V. Yakhmi, W. Haase

    INORGANIC CHEMISTRY　51　(18)　9983-9994　2012/09

    DOI： 10.1021/ic3014927 　

    ISSN： 0020-1669

  153. Co(111)/a-Cr2O3薄膜における垂直交換バイアスのパルス強磁場による等温反転

    若津 康平, 白土 優, 中村 哲也, 及川 博人, 前納 覚, 鳴海 康雄, 田添 昂, 三俣 千春, 木下 豊彦, 野尻 浩之, 中谷 亮一

    応用物理学会学術講演会講演予稿集　2012.2　1884-1884　2012/08/27

    Publisher: 公益社団法人 応用物理学会

    DOI： 10.11470/jsapmeeting.2012.2.0_1884 　

    eISSN： 2436-7613

  154. Multiferroic FeTe2O5Br: Alternating spin chains with frustrated interchain interactions Peer-reviewed

    M. Pregelj, H. O. Jeschke, H. Feldner, R. Valenti, A. Honecker, T. Saha-Dasgupta, H. Das, S. Yoshii, T. Morioka, H. Nojiri, H. Berger, A. Zorko, O. Zaharko, D. Arcon

    PHYSICAL REVIEW B　86　(5)　054402-1-6　2012/08

    DOI： 10.1103/PhysRevB.86.054402 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  155. Susceptibility Anisotropy in an Iron Arsenide Superconductor Revealed by X-Ray Diffraction in Pulsed Magnetic Fields Peer-reviewed

    J. P. C. Ruff, J. -H. Chu, H. -H. Kuo, R. K. Das, H. Nojiri, I. R. Fisher, Z. Islam

    PHYSICAL REVIEW LETTERS　109　(2)　027004-1-5　2012/07

    DOI： 10.1103/PhysRevLett.109.027004 　

    ISSN： 0031-9007

  156. Breakdown of the field-induced superconductivity by dynamical spin reversal Peer-reviewed

    Yugo Oshima, Hiroyuki Nojiri, Shinya Uji, James S. Brooks, Takahisa Tokumoto, Heng-Bo Cui, Reizo Kato, Akiko Kobayashi, Hayao Kobayashi

    PHYSICAL REVIEW B　86　(2)　024525-1-7　2012/07

    DOI： 10.1103/PhysRevB.86.024525 　

    ISSN： 1098-0121

  157. Isothermal switching of perpendicular exchange bias by pulsed high magnetic field Peer-reviewed

    Yu Shiratsuchi, Kohei Wakatsu, Tetsuya Nakamura, Hiroto Oikawa, Satoru Maenou, Yasuo Narumi, Kou Tazoe, Chiharu Mitsumata, Toyohiko Kinoshita, Hiroyuki Nojiri, Ryoichi Nakatani

    APPLIED PHYSICS LETTERS　100　(26)　262413-1-4.　2012/06

    DOI： 10.1063/1.4731643 　

    ISSN： 0003-6951

  158. Molecular Magnetism of M-6 Hexagon Ring in D-3d Symmetric [(MCl)(6)(XW9O33)(2)](12-) (M = Cu-II and Mn-II, X = Sb-III and As-III) Peer-reviewed

    Toshihiro Yamase, Hirofumi Ishikawa, Hiroko Abe, Keisuke Fukaya, Hiroyuki Nojiri, Hideo Takeuchi

    INORGANIC CHEMISTRY　51　(8)　4606-4619　2012/04

    DOI： 10.1021/ic202513q 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  159. A single-solenoid pulsed-magnet system for single-crystal scattering studies Peer-reviewed

    Zahirul Islam, Dana Capatina, Jacob P. C. Ruff, Ritesh K. Das, Emil Trakhtenberg, Hiroyuki Nojiri, Yasuo Narumi, Ulrich Welp, Paul C. Canfield

    REVIEW OF SCIENTIFIC INSTRUMENTS　83　(3)　035101-1-8　2012/03

    DOI： 10.1063/1.3688251 　

    ISSN： 0034-6748

  160. Oximato-bridged light-lanthanide Ln(4)Cu complexes showing ferromagnetic Ln-Cu exchange coupling Peer-reviewed

    Kei Fujiwara, Atsushi Okazawa, Norimichi Kojima, Go Tanaka, Shunsuke Yoshii, Hiroyuki Nojiri, Takayuki Ishida

    CHEMICAL PHYSICS LETTERS　530　49-54　2012/03

    DOI： 10.1016/j.cplett.2012.01.062 　

    ISSN： 0009-2614

  161. Coherent Manipulation of Electron Spins in the {Cu-3} Spin Triangle Complex Impregnated in Nanoporous Silicon Peer-reviewed

    K. -Y. Choi, Z. Wang, H. Nojiri, J. van Tol, P. Kumar, P. Lemmens, B. S. Bassil, U. Kortz, N. S. Dalal

    PHYSICAL REVIEW LETTERS　108　(6)　067206-1-5　2012/02

    DOI： 10.1103/PhysRevLett.108.067206 　

    ISSN： 0031-9007

  162. Robust but disordered collapsed-volume phase in a cerium alloy under the application of pulsed magnetic fields Peer-reviewed

    J. P. C. Ruff, Z. Islam, R. K. Das, H. Nojiri, J. C. Cooley, C. H. Mielke

    PHYSICAL REVIEW B　85　(2)　024104-1-6　2012/01

    DOI： 10.1103/PhysRevB.85.024104 　

    ISSN： 1098-0121

  163. Time-resolved one-dimensional detection of x-ray scattering in pulsed magnetic fields Peer-reviewed

    Zahirul Islam, Jacob P. C. Ruff, Kate A. Ross, Hiroyuki Nojiri, Bruce D. Gaulin

    REVIEW OF SCIENTIFIC INSTRUMENTS　83　(1)　013003-1-4　2012/01

    DOI： 10.1063/1.3675478 　

    ISSN： 0034-6748

    eISSN： 1089-7623

  164. Determination of exchange energies in the sawtooth spin ring {Mo75V20} by ESR Peer-reviewed

    Yugo Oshima, Hiroyuki Nojiri, Juergen Schnack, Paul Koegerler, Marshall Luban

    PHYSICAL REVIEW B　85　(2)　024413-1-5　2012/01

    DOI： 10.1103/PhysRevB.85.024413 　

    ISSN： 1098-0121

  165. Exchange coupling in TbCu and DyCu single-molecule magnets and related lanthanide and vanadium analogs Peer-reviewed

    Takayuki Ishida, Ryo Watanabe, Kei Fujiwara, Atsushi Okazawa, Norimichi Kojima, Go Tanaka, Shunsuke Yoshii, Hiroyuki Nojiri

    DALTON TRANSACTIONS　41　(44)　13609-13619　2012

    DOI： 10.1039/c2dt31169k 　

    ISSN： 1477-9226

  166. Directed assembly of nanoscale Co(II)-substituted{Co-9[P2W15](3)} and {Co-14[P2W15](4)} polyoxometalates Peer-reviewed

    Claire Lydon, Merce Martin Sabi, Mark D. Symes, De-Liang Long, Mark Murrie, Shunsuke Yoshii, Hiroyuki Nojiri, Leroy Cronin

    CHEMICAL COMMUNICATIONS　48　(79)　9819-9821　2012

    DOI： 10.1039/c2cc34865a 　

    ISSN： 1359-7345

  167. The crystal structure and magnetic properties of an organic verdazyl biradical Peer-reviewed

    K. Iwase, H. Yamaguchi, H. Nojiri, A. Matsuo, K. Kindo, Y. Hosokoshi

    26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5　400　032032-1-4　2012

    DOI： 10.1088/1742-6596/400/3/032032 　

    ISSN： 1742-6588

  168. Magnetic Phase Transition in the Verdazyl Biradical Crystal p-BIP-V-2 Peer-reviewed

    H. Yamaguchi, M. Tada, S. Nagata, K. Iwase, T. Shimokawa, H. Nakona, H. Nojiri, A. Matsuo, K. Kindo, Y. Hosokoshi

    26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5　400　032118-1-4　2012

    DOI： 10.1088/1742-6596/400/3/032118 　

    ISSN： 1742-6588

  169. High Field Neutron Diffraction Studies on Metamagnetic Transition of Multiferroic BiFeO3 Peer-reviewed

    Kenji Ohoyama, Seongsu Lee, Shunsuke Yoshii, Yasuo Narumi, Takayuki Morioka, Hiroyuki Nojiri, Gun Sang Jeon, Sang-Wook Cheong, Je-Geun Park

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　80　(12)　125001-1-2　2011/12

    DOI： 10.1143/JPSJ.80.125001 　

    ISSN： 0031-9015

  170. Exchange couplings in one-dimensionally arrayed 4f-3d heterometallic [Ln(2)Cu(2)](n) compounds: A chemical trend of the coupling parameter Peer-reviewed

    Atsushi Okazawa, Kei Fujiwara, Ryo Watanabe, Norimichi Kojima, Shunsuke Yoshii, Hiroyuki Nojiri, Takayuki Ishida

    POLYHEDRON　30　(18)　3121-3126　2011/11

    DOI： 10.1016/j.poly.2011.03.007 　

    ISSN： 0277-5387

  171. Ferromagnetic Exchange Couplings Showing a Chemical Trend in Cu-Ln-Cu Complexes (Ln = Gd, Tb, Dy, Ho, Er) Peer-reviewed

    Takashi Shimada, Atsushi Okazawa, Norimichi Kojima, Shunsuke Yoshii, Hiroyuki Nojiri, Takayuki Ishida

    INORGANIC CHEMISTRY　50　(21)　10555-10557　2011/11

    DOI： 10.1021/ic201944s 　

    ISSN： 0020-1669

  172. Single-molecule magnet behavior enhanced by magnetic coupling between 4f and 3d spins Peer-reviewed

    Atsushi Okazawa, Hiroyuki Nojiri, Takayuki Ishida, Norimichi Kojima

    POLYHEDRON　30　(18)　3140-3144　2011/11

    DOI： 10.1016/j.poly.2011.03.020 　

    ISSN： 0277-5387

  173. Thermal expansion and magnetization studies of the novel ferromagnetic shape memory alloy Ni2MnGa0.88Cu0.12 in a magnetic field Peer-reviewed

    T. Sakon, H. Nagashio, K. Sasaki, S. Susuga, D. Numakura, M. Abe, K. Endo, H. Nojiri, T. Kanomata

    PHYSICA SCRIPTA　84　(4)　045603-1-6　2011/10

    DOI： 10.1088/0031-8949/84/04/045603 　

    ISSN： 0031-8949

  174. Hysteresis Loops in an Oxo-centered {Mn3O}-type Spin Triangle Probed with a Pulsed Field Peer-reviewed

    J. -N. Park, B. J. Suh, K. Y. Choi, H. Nojiri, Z. H. Jang

    JOURNAL OF THE KOREAN PHYSICAL SOCIETY　59　(2)　317-321　2011/08

    DOI： 10.3938/jkps.59.317 　

    ISSN： 0374-4884

    eISSN： 1976-8524

  175. A new type of FCT martensite phase in single-crystalline Fe3Pt Invar alloy Peer-reviewed

    Masataka Yamamoto, Sayaka Sekida, Takashi Fukuda, Tomoyuki Kakeshita, Kohki Takahashi, Keiichi Koyama, Hiroyuki Nojiri

    JOURNAL OF ALLOYS AND COMPOUNDS　509　(34)　8530-8533　2011/08

    DOI： 10.1016/j.jallcom.2011.06.035 　

    ISSN： 0925-8388

  176. Thermal Expansion and Magnetization Studies of Novel Ferromagnetic Shape Memory Alloys Ni52Mn12.5Fe12.5Ga23 and Ni2Mn0.75Cu0.25Ga Peer-reviewed

    Takuo Sakon, Hitoshi Nagashio, Kenta Sasaki, Seiji Susuga, Keita Endo, Hiroyuki Nojiri, Takeshi Kanomata

    MATERIALS TRANSACTIONS　52　(6)　1142-1147　2011/06

    DOI： 10.2320/matertrans.M2011038 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  177. Soft X-ray Magnetic Circular Dichroism of a CoFe/MnIr Exchange Bias Film under Pulsed High Magnetic Field Peer-reviewed

    Tetsuya Nakamura, Yasuo Narumi, Toko Hirono, Misaki Hayashi, Kenji Kodama, Masakiyo Tsunoda, Shinji Isogami, Hirokazu Takahashi, Toyohiko Kinoshita, Koichi Kindo, Hiroyuki Nojiri

    APPLIED PHYSICS EXPRESS　4　(6)　066602-1-3　2011/06

    DOI： 10.1143/APEX.4.066602 　

    ISSN： 1882-0778

  178. Reply to "Comment on &apos;Transition from Bose glass to a condensate of triplons in Tl1-xKxCuCl3&apos;" Peer-reviewed

    Fumiko Yamada, Hidekazu Tanaka, Toshio Ono, Hiroyuki Nojiri

    PHYSICAL REVIEW B　83　(21)　216402-1-4　2011/06

    DOI： 10.1103/PhysRevB.83.216402 　

    ISSN： 1098-0121

  179. 25 Tesla pulsed-high-magnetic-field system for soft X-ray spectroscopy Peer-reviewed

    M. Hayashi, Y. Narumi, H. Nojiri, T. Nakamura, T. Hirono, T. Kinoshita, K. Kodama, K. Kindo

    JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA　184　(3-6)　338-341　2011/04

    DOI： 10.1016/j.elspec.2010.12.015 　

    ISSN： 0368-2048

  180. High-frequency ESR study on a frustrated mixed spin system BIPNNBNO Peer-reviewed

    T. Kanzawa, Y. Hosokoshi, K. Katoh, K. Inoue, H. Nojiri

    Journal of Physics: Conference Series　320　012034/1-012034/6　2011

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/1742-6596/320/1/012034 　

    ISSN： 1742-6596 1742-6588

  181. Antiferromagnetic resonance modes for the S=1/2 kagome antiferromagnet Cs2Cu3SnF12 Peer-reviewed

    S. Sharmin, I. Umegaki, H. Tanaka, T. Ono, G. Tanaka, H. Nojiri, M. Fujisawa, N. Matsumi, M. Tomoo, S. Okubo, H. Ohta, T. Sakurai

    INTERNATIONAL SYMPOSIUM: NANOSCIENCE AND QUANTUM PHYSICS 2011 (NANOPHYS'11)　302　012011-1-5　2011

    DOI： 10.1088/1742-6596/302/1/012011 　

    ISSN： 1742-6588

  182. Elementary excitations and specific heat in quantum sine-Gordon spin chain KCuGaF6 Peer-reviewed

    Izumi Umegaki, Toshio Ono, Hidekazu Tanaka, Masaki Oshikawa, Hiroyuki Nojiri

    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES　43　(3)　741-747　2011/01

    DOI： 10.1016/j.physe.2010.07.042 　

    ISSN： 1386-9477

  183. Transition from Bose glass to a condensate of triplons in Tl1-xKxCuCl3 Peer-reviewed

    Fumiko Yamada, Hidekazu Tanaka, Toshio Ono, Hiroyuki Nojiri

    PHYSICAL REVIEW B　83　(2)　020409-1-4　2011/01

    DOI： 10.1103/PhysRevB.83.020409 　

    ISSN： 1098-0121

  184. Chemical trend of Ln-M exchange couplings in heterometallic complexes with Ln = Gd, Tb, Dy, Ho, Er and M = Cu, V Peer-reviewed

    Ryo Watanabe, Kei Fujiwara, Atsushi Okazawa, Go Tanaka, Shunsuke Yoshii, Hiroyuki Nojiri, Takayuki Ishida

    CHEMICAL COMMUNICATIONS　47　(7)　2110-2112　2011

    DOI： 10.1039/c0cc04669h 　

    ISSN： 1359-7345

  185. Linking [Fe-3(III)] triangles with "double-headed" phenolic oximes Peer-reviewed

    K. Mason, J. Chang, E. Garlatti, A. Prescimone, S. Yoshii, H. Nojiri, J. Schnack, P. A. Tasker, S. Carretta, E. K. Brechin

    CHEMICAL COMMUNICATIONS　47　(21)　6018-6020　2011

    DOI： 10.1039/c1cc11146a 　

    ISSN： 1359-7345

  186. Redox-Controlled Magnetic {Mn-13} Keggin Systems Peer-reviewed

    Graham N. Newton, Satoshi Yamashita, Koen Hasumi, Junzo Matsuno, Norifumi Yoshida, Masayuki Nihei, Takuya Shiga, Motohiro Nakano, Hiroyuki Nojiri, Wolfgang Wernsdorfer, Hiroki Oshio

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　50　(25)　5715-5719　2011

    DOI： 10.1002/anie.201100515 　

    ISSN： 1433-7851

  187. Magnetic properties of the triangular quantum spin tube [(CuCl(2)tachH)(3)Cl]Cl-2 studied by NMR and magnetization Peer-reviewed

    Yuji Furukawa, Yuzuru Sumida, Ken-ichi Kumagai, Ferdinando Borsa, Hiroyuki Nojiri, Yusei Shimizu, Hiroshi Amitsuka, Ken-ichi Tenya, Paul Koegerler, Leroy Cronin

    INTERNATIONAL CONFERENCE ON FRUSTRATION IN CONDENSED MATTER (ICFCM)　320　012047-1-6　2011

    DOI： 10.1088/1742-6596/320/1/012047 　

    ISSN： 1742-6588

  188. Stationary Behavior in Effective Magnetic Moment and Magnetization of 2,3,6-Trifluorophenyl Nitronyl Nitroxide Radical Crystals Peer-reviewed

    Tsuneki Kanzawa, Sadafumi Nishihara, Hiroyuki Nojiri, Yuko Hosokoshi

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　83　(12)　1447-1454　2010/12

    DOI： 10.1246/bcsj.20100188 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  189. Level crossings and zero-field splitting in the {Cr-8}-cubane spin cluster studied using inelastic neutron scattering and magnetization Peer-reviewed

    D. Vaknin, V. O. Garlea, F. Demmel, E. Mamontov, H. Nojiri, C. Martin, I. Chiorescu, Y. Qiu, P. Koegerler, J. Fielden, L. Engelhardt, C. Rainey, M. Luban

    JOURNAL OF PHYSICS-CONDENSED MATTER　22　(46)　466001-1-8　2010/11

    DOI： 10.1088/0953-8984/22/46/466001 　

    ISSN： 0953-8984

  190. Magnetoelastics of a Spin Liquid: X-Ray Diffraction Studies of Tb2Ti2O7 in Pulsed Magnetic Fields Peer-reviewed

    J. P. C. Ruff, Z. Islam, J. P. Clancy, K. A. Ross, H. Nojiri, Y. H. Matsuda, H. A. Dabkowska, A. D. Dabkowski, B. D. Gaulin

    PHYSICAL REVIEW LETTERS　105　(7)　077203-1-4　2010/08

    DOI： 10.1103/PhysRevLett.105.077203 　

    ISSN： 0031-9007

  191. Heat Capacity Reveals the Physics of a Frustrated Spin Tube Peer-reviewed

    Nedko B. Ivanov, Juergen Schnack, Roman Schnalle, Johannes Richter, Paul Koegerler, Graham N. Newton, Leroy Cronin, Yugo Oshima, Hiroyuki Nojiri

    PHYSICAL REVIEW LETTERS　105　(3)　037206-1-4　2010/07

    DOI： 10.1103/PhysRevLett.105.037206 　

    ISSN： 0031-9007

  192. Observation of Elementary Excitations of Quantum Sine-Gordon Spin System KCuGaF6 Under High Magnetic Field Peer-reviewed

    I. Umegaki, H. Tanaka, T. Ono, H. Nojiri

    JOURNAL OF LOW TEMPERATURE PHYSICS　159　(1-2)　60-63　2010/04

    DOI： 10.1007/s10909-009-0072-z 　

    ISSN： 0022-2291

  193. High Magnetic Field Micro-Calorimeter and Application for BE-Condensation of Cr5+ Dimer System Peer-reviewed

    T. Zenmoto, Y. Oshima, H. Nojiri, S. H. Lee, M. Kofu

    JOURNAL OF LOW TEMPERATURE PHYSICS　159　(1-2)　118-121　2010/04

    DOI： 10.1007/s10909-009-0087-5 　

    ISSN： 0022-2291

  194. High-Magnetic-Field XMCD as a Novel Tool for the Study of Valence Fluctuation Phenomena-Application to Eu-based Intermetallic Compounds Peer-reviewed

    Y. H. Matsuda, J. L. Her, T. Inami, K. Ohwada, Z. W. Ouyang, K. Okada, H. Nojiri, A. Mitsuda, H. Wada, N. Kawamura, M. Suzuki

    JOURNAL OF LOW TEMPERATURE PHYSICS　159　(1-2)　292-296　2010/04

    DOI： 10.1007/s10909-009-0129-z 　

    ISSN： 0022-2291

  195. Instability of magnons in two-dimensional antiferromagnets at high magnetic fields Peer-reviewed

    T. Masuda, S. Kitaoka, S. Takamizawa, N. Metoki, K. Kaneko, K. C. Rule, K. Kiefer, H. Manaka, H. Nojiri

    PHYSICAL REVIEW B　81　(10)　100402-1-4　2010/03

    DOI： 10.1103/PhysRevB.81.100402 　

    ISSN： 1098-0121

  196. Martensitic transformation in invar Fe3Pt with highly ordered state

    M. Yamamoto, T. Fukuda, T. Kakeshita, K. Koyama, H. Nojiri

    Physics Procedia　10　117-119　2010

    Publisher: Elsevier B.V.

    DOI： 10.1016/j.phpro.2010.11.085 　

    ISSN： 1875-3892 1875-3884

  197. Resonant magnetic x-ray diffraction study on the successive metamagnetic transitions of TbB4 up to 30 T

    T. Inami, K. Ohwada, Y. H. Matsuda, Z. W. Ouyang, H. Nojiri, T. Matsumura, D. Okuyama, Y. Murakami

    Journal of Physics: Conference Series　211　2010

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/1742-6596/211/1/012010 　

    ISSN： 1742-6596 1742-6588

  198. Intrinsic Magnetoresistance of Single-Walled Carbon Nanotubes Probed by a Noncontact Method Peer-reviewed

    Yugo Oshima, Taishi Takenobu, Kazuhiro Yanagi, Yasumitsu Miyata, Hiromichi Kataura, Kenji Hata, Yoshihiro Iwasa, Hiroyuki Nojiri

    PHYSICAL REVIEW LETTERS　104　(1)　016803-1-4　2010/01

    DOI： 10.1103/PhysRevLett.104.016803 　

    ISSN： 0031-9007

  199. Universal Magnetic Structure of the Half-Magnetization Phase in Cr-Based Spinels Peer-reviewed

    M. Matsuda, K. Ohoyama, S. Yoshii, H. Nojiri, P. Frings, F. Duc, B. Vignolle, G. L. J. A. Rikken, L. -P. Regnault, S. -H. Lee, H. Ueda, Y. Ueda

    PHYSICAL REVIEW LETTERS　104　(4)　047201-1-4　2010/01

    DOI： 10.1103/PhysRevLett.104.047201 　

    ISSN： 0031-9007

  200. Ferromagnetic Gd-Cu, Tb-Cu, and Ho-Cu couplings in isomorphous [Ln 2Cu] complexes Peer-reviewed

    Atsushi Okazawa, Ryo Watanabe, Masaru Nezu, Takashi Shimada, Shunsuke Yoshii, Hiroyuki Nojiri, Takayuki Ishida

    Chemistry Letters　39　(12)　1331-1332　2010

    DOI： 10.1246/cl.2010.1331 　

    ISSN： 0366-7022 1348-0715

  201. A portable high-field pulsed-magnet system for single-crystal x-ray scattering studies Peer-reviewed

    Zahirul Islam, Jacob P. C. Ruff, Hiroyuki Nojiri, Yasuhiro H. Matsuda, Kathryn A. Ross, Bruce D. Gaulin, Zhe Qu, Jonathan C. Lang

    REVIEW OF SCIENTIFIC INSTRUMENTS　80　(11)　113902-1-5　2009/11

    DOI： 10.1063/1.3251273 　

    ISSN： 0034-6748

  202. Templating Odd Numbered Magnetic Rings: Oxovanadium Heptagons Sandwiched by beta-Cyclodextrins Peer-reviewed

    Norihisa Hoshino, Motohiro Nakano, Hiroyuki Nojiri, Wolfgang Wernsdorfer, Hiroki Oshio

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　131　(42)　15100-+　2009/10

    DOI： 10.1021/ja9066496 　

    ISSN： 0002-7863

  203. High-field ground-state level crossing and magnetic susceptibility of an {Fe-8}-cubane cluster Peer-reviewed

    Akira Matsuo, Koichi Kindo, Hiroyuki Nojiri, Larry Engelhardt, Marshall Luban, Euan K. Brechin, Ian A. Gass

    PHYSICAL REVIEW B　80　(9)　092401-1-3　2009/09

    DOI： 10.1103/PhysRevB.80.092401 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  204. Correlation between electron spin resonance and magnetization in Gd5Ge4 Peer-reviewed

    Z. W. Ouyang, H. Nojiri, S. Yoshii, G. H. Rao, Y. C. Wang

    PHYSICAL REVIEW B　80　(5)　054401-1-5　2009/08

    DOI： 10.1103/PhysRevB.80.054401 　

    ISSN： 1098-0121

  205. X-Ray Magnetic Circular Dichroism of a Valence Fluctuating State in Eu at High Magnetic Fields Peer-reviewed

    Y. H. Matsuda, Z. W. Ouyang, H. Nojiri, T. Inami, K. Ohwada, M. Suzuki, N. Kawamura, A. Mitsuda, H. Wada

    PHYSICAL REVIEW LETTERS　103　(4)　046402-1-4　2009/07

    DOI： 10.1103/PhysRevLett.103.046402 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  206. Magnetic properties and exchange couplings of one-dimensionally arrayed 4f-3d heterometallic [Ln(2)Cu(2)](n) compounds Peer-reviewed

    Atsushi Okazawa, Ryo Watanabe, Hiroyuki Nojiri, Takashi Nogami, Takayuki Ishida

    POLYHEDRON　28　(9-10)　1808-1813　2009/06

    DOI： 10.1016/j.poly.2008.12.035 　

    ISSN： 0277-5387

  207. Elementary excitations of the S=1/2 one-dimensional antiferromagnet KCuGaF6 in a magnetic field and quantum sine-Gordon model Peer-reviewed

    Izumi Umegaki, Hidekazu Tanaka, Toshio Ono, Hidehiro Uekusa, Hiroyuki Nojiri

    PHYSICAL REVIEW B　79　(18)　184401-1-5　2009/05

    DOI： 10.1103/PhysRevB.79.184401 　

    ISSN： 1098-0121

  208. Magnetic-Field Induced Phase Transitions in a Weakly Coupled s=1/2 Quantum Spin Dimer System Ba3Cr2O8 Peer-reviewed

    M. Kofu, H. Ueda, H. Nojiri, Y. Oshima, T. Zenmoto, K. C. Rule, S. Gerischer, B. Lake, C. D. Batista, Y. Ueda, S. -H. Lee

    PHYSICAL REVIEW LETTERS　102　(17)　177204-1-4　2009/05

    DOI： 10.1103/PhysRevLett.102.177204 　

    ISSN： 0031-9007

  209. Ferromagnetic Dy-Ni and Antiferromagnetic Dy-Cu Couplings in Single-Molecule Magnets [Dy2Ni] and [Dy2Cu] (vol 47, pg 9763, 2008) Peer-reviewed

    Atsushi Okazawa, Takashi Nogami, Hiroyuki Nojiri, Takayuki Ishida

    INORGANIC CHEMISTRY　48　(7)　3292-3292　2009/04

    DOI： 10.1021/ic900351p 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  210. Resonant Magnetic X-ray Diffraction Study on Successive Metamagnetic Transitions in TbB4 Peer-reviewed

    Toshiya Inami, Kenji Ohwada, Yasuhiro H. Matsuda, Zhong Wen Ouyang, Hiroyuki Nojiri, Takeshi Matsumura, Daisuke Okuyama, Youichi Murakami

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　78　(3)　033707-1-4　2009/03

    DOI： 10.1143/JPSJ.78.033707 　

    ISSN： 0031-9015

  211. NMR studies of a twisted quantum spin tube [(CuCl2tachH) 3Cl]Cl2 Peer-reviewed

    Y. Furukawa, Y. Sumida, K. Kumagai, H. Nojiri, P. Korgerler, L. Cronin

    Journal of Physics: Conference Series　150　(4)　2009

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/1742-6596/150/4/042036 　

    ISSN： 1742-6596 1742-6588

  212. XMCD spectroscopy on valence fluctuating and heavy fermion compounds in very high magnetic fields up to 40 T

    Y. H. Matsuda, J. L. Her, T. Inami, K. Ohwada, Z. W. Ouyang, K. Okada, H. Nojiri, A. Mitsuda, H. Wada, K. Yoshimura, H. Amitsuka, N. Kawamura, M. Suzuki, A. Kotani

    14TH INTERNATIONAL CONFERENCE ON X-RAY ABSORPTION FINE STRUCTURE (XAFS14), PROCEEDINGS　190　2009

    DOI： 10.1088/1742-6596/190/1/012019 　

    ISSN： 1742-6588

  213. Anomalous frequency and intensity scaling of collective and local modes in a coupled-spin tetrahedral system Cu2Te2O5Cl2 Peer-reviewed

    Kwang-Yong Choi, Hiroyuki Nojiri, Naresh S. Dalal, Helmuth Berger, Wolfram Brenig, Peter Lemmens

    PHYSICAL REVIEW B　79　(2)　024416-1-7　2009/01

    DOI： 10.1103/PhysRevB.79.024416 　

    ISSN： 1098-0121

  214. Structure and Magnetism of [n-BuNH3](12)[Cu-4(GeW9O34)(2)] center dot 14H(2)O Sandwiching a Rhomblike Cu-4(8+) Tetragon through alpha-Keggin Linkage Peer-reviewed

    Toshihiro Yamase, Hiroko Abe, Eri Ishikawa, Hiroyuki Nojiri, Yuhgo Ohshima

    INORGANIC CHEMISTRY　48　(1)　138-148　2009/01

    DOI： 10.1021/ic8013267 　

    ISSN： 0020-1669

  215. Insulator-metal phase transition of Pr0.6Ca0.4MnO3 studied by x-ray absorption spectroscopy in pulsed magnetic fields Peer-reviewed

    Z. W. Ouyang, Y. H. Matsuda, H. Nojiri, Y. Inada, Y. Niwa, T. Arima

    JOURNAL OF PHYSICS-CONDENSED MATTER　21　(1)　016006-1-5　2009/01

    DOI： 10.1088/0953-8984/21/1/016006 　

    ISSN： 0953-8984

  216. Undecanuclear mixed-valence 3d-4f bimetallic clusters Peer-reviewed

    Takuya Shiga, Tatsuya Onuki, Takuto Matsumoto, Hiroyuki Nojiri, Graham N. Newton, Norihisa Hoshino, Hiroki Oshio

    CHEMICAL COMMUNICATIONS　(24)　3568-3570　2009

    DOI： 10.1039/b905480d 　

    ISSN： 1359-7345

    eISSN： 1364-548X

  217. Magnetic transitions and spin dynamics in the 3d(1) system K2NaCrO8 investigated by magnetization and Na-23 NMR Peer-reviewed

    K. -Y. Choi, S. Nellutla, A. P. Reyes, P. L. Kuhns, Y. -J Jo, L. Balicas, H. Nojiri, M. Pati, N. S. Dalal

    PHYSICAL REVIEW B　78　(21)　214419 1-6　2008/12

    DOI： 10.1103/PhysRevB.78.214419 　

    ISSN： 1098-0121

  218. Ferromagnetic Dy-Ni and Antiferromagnetic Dy-Cu Couplings in Single-Molecule Magnets [Dy2Ni] and [Dy2Cu] Peer-reviewed

    Atsushi Okazawa, Takashi Nogami, Hiroyuki Nojiri, Takayuki Ishida

    INORGANIC CHEMISTRY　47　(21)　9763-9765　2008/11

    DOI： 10.1021/ic801686z 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  219. Syntheses, structures, and magnetic properties of manganese-lanthanide hexanuclear complexes Peer-reviewed

    Takuya Shiga, Norihisa Hoshino, Motohiro Nakano, Hiroyuki Nojiri, Hiroki Oshio

    INORGANICA CHIMICA ACTA　361　(14-15)　4113-4117　2008/10

    DOI： 10.1016/j.ica.2008.03.096 　

    ISSN： 0020-1693

  220. Unusual metamagnetic transitions in Pr(0.5)Ca(0.5)Mn(0.97)Ga(0.03)O(3) studied by pulsed magnetic fields Peer-reviewed

    Z. W. Ouyang, H. Nojiri, S. Yoshii

    PHYSICAL REVIEW B　78　(10)　104404-1-5　2008/09

    DOI： 10.1103/PhysRevB.78.104404 　

    ISSN： 1098-0121

  221. External magnetic field effects on a distorted kagome antiferromagnet Peer-reviewed

    J. -H. Kim, S. Ji, S. -H. Lee, B. Lake, T. Yildirim, H. Nojiri, H. Kikuchi, K. Habicht, Y. Qiu, K. Kiefer

    PHYSICAL REVIEW LETTERS　101　(10)　107201-1-4　2008/09

    DOI： 10.1103/PhysRevLett.101.107201 　

    ISSN： 0031-9007

  222. Thermodynamic properties of a spin-1/2 spin-liquid state in a kappa-type organic salt Peer-reviewed

    Satoshi Yamashita, Yasuhiro Nakazawa, Masaharu Oguni, Yugo Oshima, Hiroyuki Nojiri, Yasuhiro Shimizu, Kazuya Miyagawa, Kazushi Kanoda

    NATURE PHYSICS　4　(6)　459-462　2008/06

    DOI： 10.1038/nphys942 　

    ISSN： 1745-2473

  223. Field-induced magnetostructural transition in Gd(5)Ge(4) studied by pulsed magnetic fields Peer-reviewed

    Z. W. Ouyang, H. Nojiri, S. Yoshii, G. H. Rao, Y. C. Wang, V. K. Pecharsky, K. A. Gschneidner

    PHYSICAL REVIEW B　77　(18)　184426-1-7　2008/05

    DOI： 10.1103/PhysRevB.77.184426 　

    ISSN： 1098-0121

  224. High-magnetic-field X-ray absorption spectroscopy of field-induced valence transition in EuNi2(Si1-xGex)(2) Peer-reviewed

    Yasuhiro H. Matsuda, Toshiya Inami, Kenji Ohwada, Yuto Murata, Hiroyuki Nojiri, Youichi Murakami, Akihiro Mitsuda, Hirofumi Wada, Hiroshi Miyazaki, Isao Harada

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　77　(5)　054713-1-7　2008/05

    DOI： 10.1143/JPSJ.77.054713 　

    ISSN： 0031-9015

  225. Exchange coupling and energy-level crossing in a magnetic chain [Dy2Cu2](n) evaluated by high-frequency electron paramagnetic resonance Peer-reviewed

    Atsushi Okazawa, Takashi Nogami, Hiroyuki Nojiri, Takayuki Ishida

    CHEMISTRY OF MATERIALS　20　(9)　3110-3119　2008/05

    DOI： 10.1021/cm7O3530n 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  226. Magnetic-field-induced strain of Fe-based ferromagnetic shape-memory alloy in a pulsed magnetic field

    Takuo Sakon, Takashi Fukuda, Hiroyuki Nojiri, Tomoyuki Kakeshita

    Materials Research Society Symposium Proceedings　1050　41-46　2008

    ISSN： 0272-9172

  227. 1/3 magnetization anomaly in triangular spin prism Peer-reviewed

    Oshima Y, Nojiri H, Fukaya K, Yamase T

    J. Phys. Soc. Jpn.　77　(4)　044706-1-6　2008/01

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.1143/JPSJ.77.044706 　

    ISSN： 0031-9015

    More details Close

    A high-field magnetization process for the triangular spin prism Na17[Mn6(H2O)2(AsW9O34)2(AsW6O26)]$\cdot$38H2O, which consists of six Mn2+ ions ($S=5/2$), has been investigated. The magnetization at low temperature shows a 1/3 plateau around 5.5 T. It is examined by theoretical calculations using exact diagonalization. The experimental results can be reproduced, but only in a restricted parameter range. It implies that the plateau originates from a delicate balance of exchange couplings. We propose that the plateau is stabilized by some external perturbations, such as thermal/quantum fluctuations.

  228. Pulsed-field magnetization, electron spin resonance, and nuclear spin-lattice relaxation in the {Cu-3} spin triangle Peer-reviewed

    Kwang-Yong Choi, Naresh S. Dalal, Arneil P. Reyes, Philip L. Kuhns, Yasuhiro H. Matsuda, Hiroyuki Nojiri, Sib Sankar Mal, Ulrich Kortz

    PHYSICAL REVIEW B　77　(2)　024406-1-8　2008/01

    DOI： 10.1103/PhysRevB.77.024406 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  229. Polyoxometalate-mediated self-assembly of single-molecule magnets: {[XW9O34](2)[(Mn4Mn2O4)-Mn-III-O-II(H2O)(4)]}(12-) Peer-reviewed

    Chris Ritchie, Alan Ferguson, Hiroyuki Nojiri, Haralampos N. Miras, Yu-Fei Song, De-Liang Long, Eric Burkholder, Mark Murrie, Paul Koegerler, Euan K. Brechin, Leroy Cronin

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　47　(30)　5609-5612　2008

    DOI： 10.1002/anie.200801281 　

    ISSN： 1433-7851

    eISSN： 1521-3773

  230. Neutron diffraction study of magnetic structure in DyCu under magnetic field Peer-reviewed

    Motoyoshi Yasui, Tomoyuki Terai, Tomoyuki Kakeshita, Masaaki Matsuda, Naoto Metoki, Hiroyuki Nojiri

    Journal of Applied Physics　103　(7)　07B710-1-3　2008

    DOI： 10.1063/1.2832658 　

    ISSN： 0021-8979

  231. Direct observation of field-induced variant transformation in Fe(3)Pt using pulsed magnetic field x-ray diffraction Peer-reviewed

    Z. W. Ouyang, Y. H. Matsuda, H. Nojiri, T. Inami, K. Ohwada, M. Tsubota, T. Sakon, T. Fukuda, T. Kakeshita

    JOURNAL OF APPLIED PHYSICS　102　(11)　113917-1-6　2007/12

    DOI： 10.1063/1.2822278 　

    ISSN： 0021-8979

  232. Hybrid molecular material exhibiting single-molecule magnet behavior and molecular conductivity Peer-reviewed

    Hiroki Hiraga, Hitoshi Miyasaka, Kazuya Nakata, Takashi Kajiwara, Shinya Takaishi, Yugo Oshima, Hiroyuki Nojiri, Masahiro Yamashita

    INORGANIC CHEMISTRY　46　(23)　9661-9671　2007/11

    DOI： 10.1021/ic700727n 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  233. Application of THz-ESR for Nano-Molecular Magnets Peer-reviewed

    H. Nojiri

    Journal of the Japan Society of Infrared Science and Technology　16　(2)　30-34　2007/10

  234. Quantum tunneling of magnetization via well-defined Dy-Cu exchange coupling in a ferrimagnetic high-spin [Dy4Cu] single-molecule magnet Peer-reviewed

    Sohei Ueki, Takayuki Ishida, Takashi Nogami, Kwang-Yong Choi, Hiroyuki Nojiri

    CHEMICAL PHYSICS LETTERS　440　(4-6)　263-267　2007/06

    DOI： 10.1016/j.cplett.2007.04.063 　

    ISSN： 0009-2614

    eISSN： 1873-4448

  235. Thermodynamic properties and elementary excitations in quantum sine-Gordon spin system KCuGaF6 Peer-reviewed

    Rieko Morisaki, Toshio Ono, Hidekazu Tanaka, Hiroyuki Nojiri

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　76　(6)　063706-1-4　2007/06

    DOI： 10.1143/JPSJ.76.063706 　

    ISSN： 0031-9015

  236. Tetranuclear heterometallic cycle Dy2Cu2 and the corresponding polymer showing slow relaxation of magnetization reorientation Peer-reviewed

    Sohei Ueki, Atsushi Okazawa, Takayuki Ishida, Takashi Nogami, Hiroyuki Nojiri

    POLYHEDRON　26　(9-11)　1970-1976　2007/06

    DOI： 10.1016/j.poly.2006.09.048 　

    ISSN： 0277-5387

  237. Manganese(III,IV) and manganese(III) oxide clusters trapped by copper(II) complexes Peer-reviewed

    Satoshi Yamashita, Takuya Shiga, Masashi Kurashina, Masayuki Nihei, Hiroyuki Nojiri, Hiroshi Sawa, Toru Kakiuchi, Hiroki Oshio

    INORGANIC CHEMISTRY　46　(10)　3810-3812　2007/05

    DOI： 10.1021/ic062258h 　

    ISSN： 0020-1669

  238. Single molecule magnet: Heterodinuclear cyano-bridged cubic cluster [(Tp)(8)Fe4Ni4(CN)(12)] (Tp = hydrotris(1-pyrazolyl)borate) Peer-reviewed

    Jinkwon Kim, Sujin Han, Jin Mook Lim, Kwang-Yong Choi, Hiroyuki Nojiri, Byoung Jin Suh

    INORGANICA CHIMICA ACTA　360　(8)　2647-2652　2007/05

    DOI： 10.1016/j.ica.2006.12.049 　

    ISSN： 0020-1693

  239. Magnetic properties of LaMnO3+delta nanocrystals in MCM-41 mesoporous silica Peer-reviewed

    H. Kira, H. Tamura, Y. Ando, M. Onodera, H. Nakao, Y. Murakami, K. Tsuda, K. Ohoyama, S. Yamazaki, T. Tajiri, H. Deguchi

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　310　(2)　2480-2482　2007/03

    DOI： 10.1016/j.jmmm.2006.11.021 　

    ISSN： 0304-8853

  240. Neutron diffraction under 30T pulsed magnetic fields Peer-reviewed

    K. Ohoyama, N. Katoh, H. Nojiri, Y. H. Matsuda, H. Hiraka, K. Ikeda, H. M. Shimizu

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　310　(2)　E974-E976　2007/03

    DOI： 10.1016/j.jmmm.2006.10.958 　

    ISSN： 0304-8853

  241. Direct estimation of zero-field energy gap in the nano-scale single molecular magnet V-15 Peer-reviewed

    K. Kajiyoshi, T. Kambe, M. Mino, H. Nojiri, P. Koegerler, M. Luban

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　310　(2)　1203-1205　2007/03

    DOI： 10.1016/j.jmmm.2006.10.313 　

    ISSN： 0304-8853

  242. Manipulation of the quantum tunneling of nanomagnets by using time-dependent high magnetic fields Peer-reviewed

    Hiroyuki Nojiri, Kwang-Yong Choi, Naoki Kitamura

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　310　(2)　1468-1472　2007/03

    DOI： 10.1016/j.jmmm.2006.10.616 　

    ISSN： 0304-8853

  243. High-magnetic-field x-ray absorption spectroscopy of field-induced valence transition in YbInCu4 Peer-reviewed

    Y. H. Matsuda, T. Inami, K. Ohwada, Y. Murata, H. Nojiri, Y. Murakami, H. Ohta, W. Zhang, K. Yoshimura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　76　(3)　1-6　2007/03

    DOI： 10.1143/JPSJ.76.034702 　

    ISSN： 0031-9015

  244. Low-temperature excitations in a dilute three-dimensional anisotropic antiferromagnet Peer-reviewed

    Y. W. Rodriguez, I. E. Anderson, D. P. Belanger, H. Nojiri, F. Ye, J. A. Fernandez-Baca

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　310　(2)　1546-1548　2007/03

    DOI： 10.1016/j.jmmm.2006.10.558 　

    ISSN： 0304-8853

  245. Magnetic anisotropy in an oxo-centered {Mn3O}-type spin triangle Peer-reviewed

    Z. H. Jang, K. H. Han, B. J. Suh, D. Ii, D. -Y. Jung, K. -Y. Choi, H. Nojiri

    JOURNAL OF THE KOREAN PHYSICAL SOCIETY　50　(2)　464-469　2007/02

    ISSN： 0374-4884

  246. Magnetic-field-induced strain of shape-memory alloy Fe3Pt studied by a capacitance method in a pulsed magnetic field Peer-reviewed

    Takuo Sakon, Atsuo Takaha, Kenji Obara, Koutatsu Dejima, Hiroyuki Nojiri, Mitsuhiro Motokawa, Takashi Fukuda, Tomoyuki Kakeshita

    Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers　46　(1)　146-151　2007/01/10

    DOI： 10.1143/JJAP.46.146 　

    ISSN： 0021-4922 1347-4065

  247. A wheel-shaped single-molecule magnet of [(Mn3Mn4III)-Mn-II]: Quantum tunneling of magnetization under static and pulse magnetic fields Peer-reviewed

    Satoshi Koizumi, Masayuki Nihei, Takuya Shiga, Motohiro Nakano, Hiroyuki Nojiri, Roland Bircherrl, Oliver Waldmann, Stefan T. Ochsenbein, Hans U. Guedel, Felix Fernandez-Alonso, Hiroki Oshio

    CHEMISTRY-A EUROPEAN JOURNAL　13　(30)　8445-8453　2007

    DOI： 10.1002/chem.200700714 　

    ISSN： 0947-6539

  248. Quest for the high-field phase of CdCr2O4 using an X-ray diffraction technique

    T. Inami, K. Ohwada, M. Tsubota, Y. Murata, H. Matsuda, H. Nojiri, H. Ueda, Y. Murakami

    Journal of Physics: Conference Series　51　(1)　502-505　2006/12/01

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/1742-6596/51/1/114 　

    ISSN： 1742-6596 1742-6588

  249. Studies of an Fe-9 tridiminished icosahedron Peer-reviewed

    Evangelos I. Tolis, Larry P. Engelhardt, Pamela V. Mason, Gopalan Rajaraman, Koichi Kindo, Marshall Luban, Akira Matsuo, Hiroyuki Nojiri, James Raftery, Christian Schroeder, Grigore A. Timco, Floriana Tuna, Wolfgang Wernsdorfer, Richard E. P. Winpenny

    CHEMISTRY-A EUROPEAN JOURNAL　12　(35)　8961-8968　2006/12

    DOI： 10.1002/chem.200600400 　

    ISSN： 0947-6539

  250. Ferromagnetic exchange interactions for Cu-6(12+) and Mn-6(12+) hexagons sandwiched by two B-alpha-[XW9O33](9-) (X = As-III and Sb-III) ligands in D-3d-symmetric polyoxotungstates Peer-reviewed

    Toshihiro Yamase, Keisuke Fukaya, Hiroyuki Nojiri, Yuhgo Ohshima

    INORGANIC CHEMISTRY　45　(19)　7698-7704　2006/09

    DOI： 10.1021/ic060666f 　

    ISSN： 0020-1669

  251. ESR measurements on one-dimensional quantum ferrimagnets A(3)Cu(3)(PO4)(4) with A = Sr and Ca in submillimeter-wave region Peer-reviewed

    Shojiro Kimura, Hirofumi Ishikawa, Yuji Inagaki, Makoto Yoshida, Susumu Okubo, Hitoshi Ohta, Hiroyuki Nojiri, Alexei A. Belik, Masaki Azuma, Mikio Takano

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　75　(9)　2006/09

    DOI： 10.1143/JPSJ.75.094718 　

    ISSN： 0031-9015

  252. Magnetic excitation of S=1/2 antiferromagnetic spin chain Cu benzoate in high magnetic fields Peer-reviewed

    H. Nojiri, Y. Ajiro, T Asano, J-P Boucher

    NEW JOURNAL OF PHYSICS　8　(218)　2006/09

    DOI： 10.1088/1367-2630/8/9/218 　

    ISSN： 1367-2630

  253. EPR Measurements of a Two-dimensional Spin Frustrated System, BIPNNBNO with S=1 and S=1/2 Peer-reviewed

    T. Kanzawa, Y. Hosokoshi, K. Katoh, S. Nishihara, K. Inoue, H. Nojiri

    J. Phys.: Conference Series　51　91-94　2006/08

  254. A binuclear Fe(III)Dy(III) single molecule magnet. Quantum effects and models Peer-reviewed

    Marilena Ferbinteanu, Takashi Kajiwara, Kwang-Yong Choi, Hiroyuki Nojiri, Akio Nakamoto, Norimichi Kojima, Fanica Cimpoesu, Yuichi Fujimura, Shinya Takaishi, Masahiro Yamashita

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　128　(28)　9008-9009　2006/07

    DOI： 10.1021/ja062399i 　

    ISSN： 0002-7863

  255. From an S-T=3 single-molecule magnet to diamagnetic ground state depending on the molecular packing of Mn(III)salen-type dimers decorated by N,N '-dicyano-1,4-naphthoquinonediiminate radicals Peer-reviewed

    C Kachi-Terajima, H Miyasaka, K Sugiura, R Clerac, H Nojiri

    INORGANIC CHEMISTRY　45　(11)　4381-4390　2006/05

    DOI： 10.1021/ic0519842 　

    ISSN： 0020-1669

  256. Ferromagnetic ordering in a new nickel polyborate NiB12O14(OH)(10) Peer-reviewed

    J Ju, J Sasaki, T Yang, S Kasamatsu, E Negishi, GB Li, JH Lin, H Nojiri, T Rachi, K Tanigaki, N Toyota

    DALTON TRANSACTIONS　13　(13)　1597-1601　2006/04

    DOI： 10.1039/b517155e 　

    ISSN： 1477-9226

  257. Cyclotron resonance in II-VI semiconductors at THz region Peer-reviewed

    Y Imanaka, T Takamasu, K Takehana, M Oshikiri, G Kido, H Nojiri, YH Matsuda, H Arimoto, S Takeyama, N Miura, G Karczewski, T Wojtowicz, J Kossut

    PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS　243　(4)　939-942　2006/03

    DOI： 10.1002/pssb.200564719 　

    ISSN： 0370-1972

  258. Observation of field-dependent magnetic parameters in the magnetic molecule {Ni4Mo12} Peer-reviewed

    J Schnack, M Bruger, M Luban, P Kogerler, E Morosan, R Fuchs, R Modler, H Nojiri, RC Rai, J Cao, JL Musfeldt, Wei, X

    PHYSICAL REVIEW B　73　(9)　094401-1-9　2006/03

    DOI： 10.1103/PhysRevB.73.094401 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  259. Observation of a half step magnetization in the {Cu-3}-type triangular spin Invited Peer-reviewed

    KY Choi, YH Matsuda, H Nojiri, U Kortz, F Hussain, AC Stowe, C Ramsey, NS Dalal

    PHYSICAL REVIEW LETTERS　96　(10)　107202-1-107202-4　2006/03

    DOI： 10.1103/PhysRevLett.96.107202 　

    ISSN： 0031-9007

  260. High field X-ray diffraction study on a magnetic-field-induced valence transition in YbInCu4 Peer-reviewed

    YH Matsuda, T Inami, K Ohwada, Y Murata, H Nojiri, Y Murakami, H Ohta, W Zhang, K Yoshimura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　75　(2)　1-5　2006/02

    DOI： 10.1143/JPSJ.75.024710 　

    ISSN： 0031-9015

  261. Collective magnetic excitation in a single-chain magnet by electron spin resonance measurements Peer-reviewed

    Yugo Oshima, Hiroyuki Nojiri, Kaname Asakura, Toru Sakai, Masahiro Yamashita, Hitoshi Miyasaka

    Physical Review B - Condensed Matter and Materials Physics　73　(21)　2006

    DOI： 10.1103/PhysRevB.73.214435 　

    ISSN： 1098-0121 1550-235X

  262. Neutron diffraction experiments with 40T pulsed magnets Peer-reviewed

    K. Ohoyama, N. Katoh, H. Nojiri, Y. H. Matsuda, H. Hiraka, K. Ikeda, H. M. Shimizu

    YAMADA CONFERENCE LX ON RESEARCH IN HIGH MAGNETIC FIELDS　51　506-+　2006

    DOI： 10.1088/174-6596/51/1/115 　

    ISSN： 1742-6588

  263. Application of miniature pulsed magnets to synchrotron X-ray spectroscopy and neutron diffraction Peer-reviewed

    Y. H. Matsuda, Y. Murata, T. Inami, K. Ohwada, H. Nojiri, K. Hoyama, N. Katoh, Y. Murakami, F. Iga, T. Takabatake, A. Mitsuda, H. Wada

    YAMADA CONFERENCE LX ON RESEARCH IN HIGH MAGNETIC FIELDS　51　490-+　2006

    DOI： 10.1088/174-6596/51/1/111 　

    ISSN： 1742-6588

  264. Ferro-antiferromagnetic delta-chain system studied by high field magnetization measurements Peer-reviewed

    Y Inagaki, Y Narumi, K Kindo, H Kikuchi, T Kamikawa, T Kunimoto, S Okubo, H Ohta, T Saito, M Azuma, M Takano, H Nojiri, M Kaburagi, T Tonegawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　74　(10)　2831-2835　2005/10

    DOI： 10.1143/JPSJ.74.2831 　

    ISSN： 0031-9015

  265. X-ray diffraction experiments under pulsed magnetic fields above 30 T Peer-reviewed

    T Inami, K Ohwada, YH Matsuda, Y Ueda, H Nojiri, Y Murakami, T Arima, H Ohta, W Zhang, K Yoshimura

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS　238　(1-4)　233-236　2005/08

    DOI： 10.1016/j.nimb.2005.06.053 　

    ISSN： 0168-583X

  266. Cyano-bridged (Mn3MIII)-M-III (M-III = Fe, Cr) complexes: Synthesis, structure, and magnetic properties Peer-reviewed

    H Miyasaka, H Takahashi, T Madanbashi, K Sugiura, R Clerac, H Nojiri

    INORGANIC CHEMISTRY　44　(17)　5969-5971　2005/08

    DOI： 10.1021/ic0505753 　

    ISSN： 0020-1669

  267. A single-chain magnet formed by a twisted arrangement of ions with easy-plane magnetic anisotropy Peer-reviewed

    T Kajiwara, M Nakano, Y Kaneko, S Takaishi, T Ito, M Yamashita, A Igashira-Kamiyama, H Nojiri, Y Ono, N Kojima

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　127　(29)　10150-10151　2005/07

    DOI： 10.1021/ja052653r 　

    ISSN： 0002-7863

  268. A heterometal single-molecule magnet of [(Mn2Ni2Cl2)-Ni-III-Cl-II(salpa)(2)] Peer-reviewed

    H Oshio, M Nihei, S Koizumi, T Shiga, H Nojiri, M Nakano, N Shirakawa, M Akatsu

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　127　(13)　4568-4569　2005/04

    DOI： 10.1021/ja042217p 　

    ISSN： 0002-7863

  269. Effect of spin chirality on magnetization in triangular rings Peer-reviewed

    H Nojiri, E Ishikawa, T Yamase

    PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT　159　(159)　292-296　2005

    DOI： 10.1143/PTPS.159.292 　

    ISSN： 0375-9687

  270. Competing spin phases in geometrically frustrated magnetic molecules Peer-reviewed

    C Schroder, H Nojiri, J Schnack, P Hage, M Luban, P Kogerler

    PHYSICAL REVIEW LETTERS　94　(1)　017205-1-4　2005/01

    DOI： 10.1103/PhysRevLett.94.017205 　

    ISSN： 0031-9007

  271. A dinuclear Mn-III-Cu-II single-molecule magnet Peer-reviewed

    H Oshio, M Nihei, A Yoshida, H Nojiri, M Nakano, A Yamaguchi, Y Karaki, H Ishimoto

    CHEMISTRY-A EUROPEAN JOURNAL　11　(3)　843-848　2005/01

    DOI： 10.1002/chem.200400368 　

    ISSN： 0947-6539

  272. Spin-frustrated (VO)(3)(6+)-triangle-sandwiching octadecatungstates as a new class of molecular magnets Invited Peer-reviewed

    T Yamase, E Ishikawa, K Fukaya, H Nojiri, T Taniguchi, T Atake

    INORGANIC CHEMISTRY　43　(25)　8150-8157　2004/12

    DOI： 10.1021/ic049669n 　

    ISSN： 0020-1669

  273. Magnetic characterization of the frustrated three-leg ladder compound [(CuCl2tachH)3CI]Cl2 Peer-reviewed

    Jürgen Schnack, Hiroyuki Nojiri, Paul Kögerler, Geoffrey J. T. Cooper, Leroy Cronin

    Physical Review B - Condensed Matter and Materials Physics　70　(17)　1-5　2004/11

    DOI： 10.1103/PhysRevB.70.174420 　

    ISSN： 0163-1829

  274. Structure and magnetic properties of the single-molecule magnet [Mn11CrO12(O2CCH3)(16)(H2O)(4)]center dot 2CH(3)COOH center dot 4H(2)O: Magnetization manipulation and dipolar-biased tunneling in a Mn11Cr/Mn-12 mixed crystal Invited Peer-reviewed

    H Hachisuka, K Awaga, T Yokoyama, T Kubo, T Goto, H Nojiri

    PHYSICAL REVIEW B　70　(10)　2004/09

    DOI： 10.1103/PhysRevB.70.104427 　

    ISSN： 1098-0121

  275. Application of a portable pulsed magnet to magneto-spectroscopy using FEL Peer-reviewed

    YH Matsuda, Y Ueda, H Nojiri

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT　528　(1-2)　632-635　2004/08

    DOI： 10.1016/j.nima.2004.04.117 　

    ISSN： 0168-9002

  276. Submillimeter and millimeter wave ESR measurements of diamond-chain substance Cu-3(CO3)(2)(OH)(2) Peer-reviewed

    S Okubo, T Kamikawa, T Kunimoto, Y Inagaki, H Ohta, H Nojiri, H Kikuchi

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　272　912-913　2004/05

    DOI： 10.1016/j.jmmm.2003.12.1300 　

    ISSN： 0304-8853

  277. Low-temperature magnetization of the distorted triangular magnet manganese tricyanomethanide\ Invited Peer-reviewed

    R Feyerherm, A Loose, H Nojiri

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　272　1054-1055　2004/05

    DOI： 10.1016/j.jmmm.2003.12.1166 　

    ISSN： 0304-8853

  278. Magnetic properties of isostructural spin-ladder systems (C5H12N)(2)CuCl4 and (C5H12N)(2)CuCl2Br2 Peer-reviewed

    T Tajiri, H Deguchi, M Mito, S Takagi, H Nojiri, T Kawae, K Takeda

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　272　1070-1071　2004/05

    DOI： 10.1016/j.jmmm.2003.12.014 　

    ISSN： 0304-8853

  279. ESR of quantum spin chains with staggered fields Peer-reviewed

    T. Asano, Y. Ajiro, Y. Inagaki, H. Nojiri, T. Sakon, T. Ishida, T. Nogami, J. P. Boucher, M. Motokawa

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　272　(Supplement 1)　E685-E686　2004/05

    DOI： 10.1016/j.jmmm.2003.11.339 　

    ISSN： 0304-8853

  280. Application of a portable pulsed magnet to synchrotron radiation experiments Peer-reviewed

    Y. H. Matsuda, Y. Ueda, H. Nojiri, T. Takahashi, T. Inami, K. Ohwada, Y. Murakami, T. Arima

    Physica B: Condensed Matter　346-347　(1-4)　519-523　2004/04/30

    DOI： 10.1016/j.physb.2004.01.139 　

    ISSN： 0921-4526

  281. Magneto-spectroscopy in solids using a pulsed magnet and coherent millimeter wave radiation

    Y. H. Matsuda, H. Nojiri, Y. Ueda, M. Inoue, T. Takahashi, T. Matsuyama

    KURRI Progress Report　82　2004/04

    ISSN： 0919-1038

  282. Synthesis and magnetic properties of Gd1.2Fe4Si9.8 single crystal Peer-reviewed

    S Noguchi, T Sakon, H Nojiri, M Motokawa

    PHYSICA B-CONDENSED MATTER　346　183-186　2004/04

    DOI： 10.1016/j.physb.2004.01.046 　

    ISSN： 0921-4526

  283. Quantum dynamics of molecular magnets in ultra-fast sweeping magnetic fields Peer-reviewed

    H Nojiri, T Taniguchi, A Yoshitami, A Muller, B Barbara

    PHYSICA B-CONDENSED MATTER　346　216-220　2004/04

    DOI： 10.1016/j.physb.2004.01.053 　

    ISSN： 0921-4526

  284. Cyclotron resonance and Faraday rotation in n-type CdS at ultra-high magnetic fields Peer-reviewed

    Y Imanaka, H Nojiri, YH Matsuda, N Miura

    PHYSICA B-CONDENSED MATTER　346　437-441　2004/04

    DOI： 10.1016/j.physb.2004.01.122 　

    ISSN： 0921-4526

  285. Possible magnetic ordering and high field magnetization of Er1.2Fe4Si9.8 single crystal Peer-reviewed

    S Noguchi, T Sakon, H Nojiri, M Motokawa

    PHYSICA B-CONDENSED MATTER　346　179-182　2004/04

    DOI： 10.1016/j.physb.2004.01.045 　

    ISSN： 0921-4526

  286. FIR-magnetospectroscopy on molecular magnets Peer-reviewed

    Nojiri H, Hachisuka H, Awaga K, Kogerler P, Luban M, Barra AL

    CONFERENCE DIGEST OF THE 2004 JOINT 29TH INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES AND 12TH INTERNATIONAL CONFERENCE ON TERAHERTZ ELECTRONICS　127-128　2004

  287. Pulsed high magnetic fields for neutron and X-ray scattering experiments Peer-reviewed

    H. Nojiri

    Journal of Neutron Research　12　(4)　279-281　2004

    DOI： 10.1080/10238160412331299438 　

    ISSN： 1477-2655 1023-8166

  288. ESR study on spin-gap compounds with magnetization plateaux Peer-reviewed

    H Nojiri, H. Tanaka, B. Kurniawan, M. Motokawa

    Quantum Properties of Low-dimensional Antiferromagnets, Kyushu Univ. Press　19-26　2003/12/31

  289. ESR study on the excited state energy spectrum of SrCu2(BO3)(2) - A central role of multiple-triplet bound states Peer-reviewed

    H Nojiri, H Kageyama, Y Ueda, M Motokawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　72　(12)　3243-3253　2003/12

    DOI： 10.1143/JPSJ.72.3243 　

    ISSN： 0031-9015

  290. Magnetic properties of bond-alternating quantum spin chain system: (CH3)(2)NH2CuX3 (X = Cl, Br) Peer-reviewed

    Y Ajiro, K Takeo, Y Inagaki, T Asano, A Shimogai, M Mito, T Kawae, K Takeda, T Sakon, H Nojiri, M Motokawa

    PHYSICA B-CONDENSED MATTER　329　1008-1009　2003/05

    DOI： 10.1016/S0921-4526(02)02189-0 　

    ISSN： 0921-4526

  291. ESR study of sine-Gordon excitations in S = 1/2 antiferromagnetic chain: copper benzoate Peer-reviewed

    T Asano, H Nojiri, Y Inagaki, T Sakon, JP Boucher, Y Ajiro, M Motokawa

    PHYSICA B-CONDENSED MATTER　329　1213-1214　2003/05

    DOI： 10.1016/S0921-4526(02)02137-3 　

    ISSN： 0921-4526

    eISSN： 1873-2135

  292. Coexistence of gap-less and gapped excitations in NH4CuCl3 Peer-reviewed

    H Nojiri, H Tanaka, B Kurniawan, M Motokawa

    PHYSICA B-CONDENSED MATTER　329　701-702　2003/05

    DOI： 10.1016/S0921-4526(02)02012-4 　

    ISSN： 0921-4526

  293. Electron spin resonance measurements at ultralow temperatures Peer-reviewed

    T Sakon, K Koyama, M Motokawa, H Nojiri, T Asano, Y Ajiro

    PHYSICA B-CONDENSED MATTER　329　1629-1631　2003/05

    DOI： 10.1016/S0921-4526(02)02433-X 　

    ISSN： 0921-4526

  294. Unusual magnetization reversal of Mn-12 cluster in ultra-fast sweeping fields Peer-reviewed

    T Taniguchi, H Nojiri, K Takeda, K Awaga

    PHYSICA B-CONDENSED MATTER　329　1179-1180　2003/05

    DOI： 10.1016/S0921-4526(02)02097-5 　

    ISSN： 0921-4526

  295. Quantum level structure of molecular magnets, Fe12 and V15 Peer-reviewed

    Y Ajiro, Y Inagaki, H Itoh, T Asano, Y Narumi, K Kindo, T Sakon, H Nojiri, M Motokawa, A Cornia, D Gatteschi, A Muller, B Barbara

    PHYSICA B-CONDENSED MATTER　329　1138-1139　2003/05

    DOI： 10.1016/S0921-4526(02)02046-X 　

    ISSN： 0921-4526

  296. Electron spin resonance using a pulsed magnet and coherent millimeter wave radiation Peer-reviewed

    Y.H. Matsuda, H. Nojiri, Y. Ueda, M. Inoue, T. Takahashi, T. Matsuyama

    KURRI Progress Report　71-　2003

  297. Application of Submillimeter Wave Electron Spin Resonance for Novel Magnetic Systems

    OHTA Hitoshi, NOJIRI H, MOTOKAWA M

    J. Phys. Soc. Jpn.　72, Supplement B183pages　53-60　2003

    Publisher:

    ISSN： 0031-9015

  298. Effect of staggered field in S = 1/2 antiferromagnetic chain: Copper pyrimidine Peer-reviewed

    Takayuki Asano, Daisuke Nomura, Yuji Inagaki, Yoshitami Ajiro, Hiroyuki Nojiri, Yasuo Narumi, Koichi Kindo, Takayuki Ishida, Takashi Nogami

    Physica B: Condensed Matter　329-333　(II)　1006-1007　2003

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(02)02187-7 　

    ISSN： 0921-4526

  299. THz-ESR system by using single shot and repeating pulsed magnetic fields Peer-reviewed

    Hiroyuki Nojiri, Mitsuhiro Motokawal, Kiichi Okuda, Hiroshi Kageyama, Yutaka Ueda, Hidekazu Tanaka

    Journal of the Physical Society of Japan　72　109-116　2003

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJS.72SB.109 　

    ISSN： 1347-4073 0031-9015

  300. The role of ESR in research of low-dimensional antiferromagnets Peer-reviewed

    Mitsuhiro Motokawa, Ohta Hitoshi, Nojiri Hiroyuki, Kimura Shojiro

    Journal of the Physical Society of Japan　72　1-11　2003

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJS.72SA.1 　

    ISSN： 1347-4073 0031-9015

  301. Electron Spin resonance in triangular antiferromagnets Peer-reviewed

    Hidekazu Tanaka, Toshio Ono, Shuji Maruyama, Soichiro Teraoka, Kazukiyo Nagata, Hitoshi Ohta, Susumu Okubo, Shojiro Kimura, Takashi Kambe, Hiroyuki Nojiri, Mitsuhiro Motokawa

    Journal of the Physical Society of Japan　72　84-98　2003

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJS.72SB.84 　

    ISSN： 1347-4073 0031-9015

  302. ESR measurements at ultra-low temperatures using a dilution refrigerator Peer-reviewed

    Takuo Sakon, Hiroyuki Nojiri, Keiichi Koyama, Takayuki Asano, Yoshitami Ajiro, Mitsuhiro Motokawa

    Journal of the Physical Society of Japan　72　140-144　2003

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJS.72SB.140 　

    ISSN： 1347-4073 0031-9015

  303. Magnetic anisotropy, tunneling effects, high-frequency EPR, and molecular structure of fast-relaxation species of Mn12 Peer-reviewed

    K. Takeda, K. Awaga, T. Inabe, A. Yamaguchi, H. Ishimoto, T. Tomita, H. Mitamura, T. Goto, N. Mori, H. Nojiri

    Phys. Rev. B.　65　094424-1-12　2002/12/31

  304. Evidence for the excited triplet of Co3+ in LaCoO3 Peer-reviewed

    S. Noguchi, S. Kawamata, K. Okuda, H. Nojiri, M. Motokawa

    Physical Review B - Condensed Matter and Materials Physics　66　(9)　944041-944045　2002/09/01

    DOI： 10.1103/PhysRevB.66.094404 　

    ISSN： 0163-1829

  305. mu SR study of Cu benzoate at very low temperature - Existence or nonexistence of long range order in coupled chains Peer-reviewed

    T Asano, H Nojiri, W Higemoto, A Koda, R Kadono, Y Ajiro

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　71　(2)　594-598　2002/02

    DOI： 10.1143/JPSJ.71.594 　

    ISSN： 0031-9015

  306. Magnetic anisotropy, tunneling effects, high-frequency EPR, and molecular structure of fast-relaxation species of (formula presented) Peer-reviewed

    Keiji Takeda, Kunio Awaga, Tamotsu Inabe, Akira Yamaguchi, Hidehiko Ishimoto, Takahiro Tomita, Hiroyuki Mitamura, Tsuneaki Goto, Nobuo Môri, Hiroyuki Nojiri

    Physical Review B - Condensed Matter and Materials Physics　65　(9)　1-12　2002

    DOI： 10.1103/PhysRevB.65.094424 　

    ISSN： 1550-235X 1098-0121

  307. Elementary excitations in quantum antiferromagnetic chains: Dyons, spinons and breathers Peer-reviewed

    T Asano, H Nojiri, Y Inagaki, Y Ajiro, LP Regnault, JP Boucher

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　379　121-130　2002

    DOI： 10.1080/10587250290090363 　

    ISSN： 1058-725X

  308. ESR measurements on triangular antiferromagnets CsCu1-xCoxCl3 Peer-reviewed

    T Ono, H Tanaka, H Nojiri, M Motokawa

    EPR IN THE 21ST CENTURY: BASICS AND APPLICATIONS TO MATERIAL, LIFE AND EARTH SCIENCES　775-778　2002

  309. ESR at ultra-low temperatures and observation of new mode in Cu-Benzoate Peer-reviewed

    T Sakon, H Nojiri, K Koyama, T Asano, Y Ajiro, M Motokawa

    EPR IN THE 21ST CENTURY: BASICS AND APPLICATIONS TO MATERIAL, LIFE AND EARTH SCIENCES　807-812　2002

  310. Magnetic properties of Fe 12 ring: ESR and magnetization measurements Peer-reviewed

    Y Inagaki, T Asano, Y Ajiro, Y Narumi, K Kindo, H Nojiri, M Motokawa, A Corni, D Gatteschi

    EPR IN THE 21ST CENTURY: BASICS AND APPLICATIONS TO MATERIAL, LIFE AND EARTH SCIENCES　784-787　2002

  311. Magnetic properties of a random-bond ladder Cu-2(C5H12N2)(2)(Cl1-xBrx)(4) at low temperatures Peer-reviewed

    H Deguchi, H Watanabe, S Yamamoto, S Takagi, M Mito, T Kawae, K Takeda, H Nojiri, M Motokawa

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　376　353-358　2002

    DOI： 10.1080/10587250210765 　

    ISSN： 1058-725X

  312. High frequency ESR on quantum spin systems by using single shot and repeating pulsed fields Peer-reviewed

    H Nojiri

    EPR IN THE 21ST CENTURY: BASICS AND APPLICATIONS TO MATERIAL, LIFE AND EARTH SCIENCES　751-754　2002

  313. Spin Polarization Dependent Far Infrared Absorption in Ga1-xMnxAs Peer-reviewed

    Y. Nagai, T. Kunimoto, K. Nagasaka, H. Nojiri, M. Motokawa, F. Matsukura, T. Dietl, H. Ohno

    Jpn. J. Appl. Phys.　40　(11)　6231-6234　2001/12/31

    Publisher: The Japan Society of Applied Physics

    DOI： 10.1143/JJAP.40.6231 　

    ISSN： 0021-4922

    More details Close

    Infrared and far infrared transmission spectra have been measured for the ferromagnetic Ga1-xMnxAs ($x=0.034$ and $x=0.050$) between 10 and 12000 cm-1. A broad peak is observed around 1600 cm-1, and this energy is close to the deep acceptor level of Mn impurity in GaAs. A finite featureless absorption, spreading between this peak and the band gap, due to inter valence band transitions is also observed. At the same time, a non-zero absorption is observed in the lowest frequency studied, which points to the absorption by mobile holes related to the metallic DC conductivity. The frequency dependence in this range, which differs markedly from the Drude model, demonstrates a strong influence of electrostatic and magnetic disorder on the optical conductivity. In particular, the existence of a strong coupling between the Mn spins and the holes explains the considerable increase of the far infrared absorption below the ferromagnetic ordering temperature.

  314. Electron spin resonance study of Cu benzoate using a 3He-4He dilution refrigerator Peer-reviewed

    Takuo Sakon, Hiroyuki Nojiri, Keiichi Koyama, Takayuki Asano, Yoshitami Ajiro, Mitsuhiro Motokawa

    Journal of the Physical Society of Japan　70　(8)　2259-2262　2001/08

    DOI： 10.1143/JPSJ.70.2259 　

    ISSN： 0031-9015

  315. High-frequency ferromagnetic resonance in Nd2Fe14B/α-Fe nanocomposite films Peer-reviewed

    H. Kato, M. Ishizone, T. Miyazaki, K. Koyama, H. Nojiri, M. Motokawa, T. Ishizaki

    IEEE Transactions on Magnetics　37　(4 I)　2567-2569　2001/07

    DOI： 10.1109/20.951237 　

    ISSN： 0018-9464

  316. Magnetic and electrical properties of Fe2+xV1-xAl Peer-reviewed

    T. Kanomata, T. Sasaki, T. Hoshi, T. Narita, T. Harada, H. Nishihara, T. Yoshida, R. Note, K. Koyama, H. Nojiri, T. Kaneko, M. Motokawa

    Journal of Alloys and Compounds　317-318　390-394　2001/04/12

    DOI： 10.1016/S0925-8388(00)01444-4 　

    ISSN： 0925-8388

  317. Susceptibility, Magnetization Process and ESR Studies on the Helical Spin System RbCuCl3 Peer-reviewed

    Syuji Maruyama, Hidekazu Tanaka, Yasuo Narumi, Koichi Kindo, Hiroyuki Nojiri, Mitsuhiro Motokawa, Kazukiyo Nagata

    Journal of the Physical Society of Japan　70　(3)　859-865　2001/03

    DOI： 10.1143/JPSJ.70.859 　

    ISSN： 0031-9015

  318. Investigation of Phonon Anomaly in the Orbital Order State of La1-xSrxMnO3 (x ∼ 1/8) Peer-reviewed

    Akira Takazawa, Hiroyuki Nojiri, Keigo Nagasaka, Kazuma Hirota, Yasuo Endoh

    Journal of the Physical Society of Japan　70　(3)　902-910　2001/03

    DOI： 10.1143/JPSJ.70.902 　

    ISSN： 0031-9015

  319. Pulsed high magnetic field ESR measurement on Ni/Pd nano-particles Peer-reviewed

    H. Hori, T. Teranishi, T. Sasaki, M. Miyake, Y. Yamamoto, S. Yamada, H. Nojiri, M. Motokawa

    Physica B: Condensed Matter　294-295　292-297　2001

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(00)00662-1 　

    ISSN： 0921-4526

  320. ESR and CR measurements of Gd monopnictides Peer-reviewed

    Keiichi Koyama, Makoto Yoshida, Takuo Sakon, Hiroyuki Nojiri, Dexin Li, Takashi Suzuki, Mitsuhiro Motokawa

    Physica B: Condensed Matter　294-295　156-159　2001

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(00)00631-1 　

    ISSN： 0921-4526

  321. High field magnetoresistance and ESR measurements on Ni stripes on GaAs substrate Peer-reviewed

    A. Matsuo, M. Taki, S. A. Haque, Y. Yamamoto, T. Kikutani, S. Yamada, H. Nojiri, M. Motokawa, H. Hori

    Physica B: Condensed Matter　294-295　298-301　2001

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(00)00663-3 　

    ISSN： 0921-4526

  322. High-field AFMR measurement of Nd2BaNiO5 single crystal in the submillimeter wave region Peer-reviewed

    S. Okubo, T. Yamada, H. Ohta, T. Yokoo, J. Akimitsu, H. Nojiri, M. Motokawa

    Physica B: Condensed Matter　294-295　51-54　2001

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(00)00606-2 　

    ISSN： 0921-4526

  323. Magnetic properties and Mössbauer effect in single-crystalline EuPdSb Peer-reviewed

    M. Shirakawa, T. Sakon, H. Nojiri, M. Motokawa, J. A. Hodges, P. Bonville, H. Suzuki, M. Kasaya

    Journal of Magnetism and Magnetic Materials　226-230　(II)　1177-1179　2001

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(00)00725-3 　

    ISSN： 0304-8853

  324. High-field ESR measurements of SrCu2(BO3)2 Peer-reviewed

    Shojiro Kimura, Susumu Hirai, Yasuo Narumi, Koichi Kindo, Hiroyuki Nojiri, Hiroshi Kageyama, Kenzo Onizuka, Yutaka Ueda

    Physica B: Condensed Matter　294-295　68-70　2001

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(00)00610-4 　

    ISSN： 0921-4526

  325. High-field ESR on quantum spin systems Peer-reviewed

    H. Nojiri, T. Asano, Y. Ajiro, H. Kageyama, Y. Ueda, M. Motokawa

    Physica B: Condensed Matter　294-295　14-19　2001

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(00)00598-6 　

    ISSN： 0921-4526

  326. Magnetic excitations at magnetization plateaux: ESR study on SrCu2 (BO3)2 Peer-reviewed

    H. Nojiri, H. Kageyama, Y. Ueda, M. Motokawa

    Journal of Magnetism and Magnetic Materials　226-230　(II)　1101-1102　2001

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(00)00636-3 　

    ISSN： 0304-8853

  327. Antiferromagnetic resonance in charge ordering state of Pr 0.5Ca0.5MnO3-δ single crystal Peer-reviewed

    S. Kawamata, S. Noguchi, K. Okuda, H. Nojiri, M. Motokawa

    Journal of Magnetism and Magnetic Materials　226-230　(I)　854-856　2001

    Publisher: Elsevier B.V.

    DOI： 10.1016/S0304-8853(00)01290-7 　

    ISSN： 0304-8853

  328. High-Field, High-Frequency ESR in the One-Dimensional Quantum Spin Systems Peer-reviewed

    Ajiro Yoshitami, Asano Takayuki, Inagaki Yuji, Boucher J.P, Nojiri Hiroyuki Luther Sebastian, Sakon Takuo, Motokawa Mitsuhiro

    J. Phys. Soc. Jpn.　69 Suppl.A　297-302　2000/12/31

    Publisher:

    ISSN： 0031-9015

  329. Submillimeter Wave ESR Study on Quantum Spin Systems Peer-reviewed

    Nojiri Hiroyuki, Kageyama Hiroshi, Onizuka Kenzo, Ueda Yutaka, Asano Takayuki, Ajiro Yoshitami, Motokawa Mitsuhiro

    J. Phys. Soc. Jpn.　69 Suppl.B　83-88　2000/12/31

  330. Submillimeter wave ESR study on quantum spin systems Peer-reviewed

    H. Nojiri, K. Onizuka, Y. Ueda, T. Asano, Y. Ajiro, M. Motokawa

    Suppl. B. J. Phys. Soc. Jpn.　69　83-88　2000/12/31

  331. Magnetization and high-frequency ESR study on the tetranuclear cluster composed of pi-electrons (S=1/2) and d-electrons (S=5/2) Peer-reviewed

    Y. Inagaki, T. Asano, Y. Ajiro, T. Kawae, K. Takeda, H. Nojiri, M. Motokawa, H. Mitamura, T. Goto, M. Tanaka, K. Matsuda, H. Iwamura

    Mol. Cryst. Liq. Cryst　343　115-120　2000/12/31

  332. High-field ESR in one-dimensional quantum spin systems Peer-reviewed

    Y Ajiro, T Asano, Y Inagaki, JP Boucher, S Luther, H Nojiri, M Motokawa

    PHYSICA B　284　1625-1626　2000/07

    ISSN： 0921-4526

  333. Submillimeter wave ESR study of Cd1-xMnxTe Peer-reviewed

    H. Nojiri, M. Motokawa, S. Takeyama, T. Sato

    Journal of Crystal Growth　214　424-427　2000/06/02

    Publisher: Elsevier Science B.V.

    DOI： 10.1016/S0022-0248(00)00122-6 　

    ISSN： 0022-0248

  334. Magnetic properties of Ce3Ni2Si8 Peer-reviewed

    S. Noguchi, K. Okuda, H. Nojiri, M. Motokawa

    Physica B: Condensed Matter　281-282　79-80　2000/06/01

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(99)00818-2 　

    ISSN： 0921-4526

  335. Magnetic resonance of GdAs Peer-reviewed

    K. Koyama, M. Yoshida, H. Nojiri, T. Sakon, M. Motokawa, D. X. Li, T. Suzuki

    Physica B: Condensed Matter　281-282　456-457　2000/06/01

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(99)01047-9 　

    ISSN： 0921-4526

  336. High-field magnetization and high-frequency ESR study on the tetranuclear cluster composed of pi-electrons (S=1/2) and d-electrons (S=5/2) Peer-reviewed

    Y Inagaki, T Asano, Y Ajiro, T Kawae, K Takeda, H Nojiri, M Motokawa, H Mitamura, T Goto, M Tanaka, K Matsuda, H Iwamura

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　343　433-438　2000

    ISSN： 1058-725X

  337. High-field Magnetization and High-frequency ESR Study on the Tetranuclear Cluster Composed of π-Electrons (S = 1/2) and d-Electrons (S = 5/2) Peer-reviewed

    Y. Inagaki, T. Asano, Y. Ajiro, T. Kawae, K. Takeda, H. Nojiri, M. Motokawa, H. Mitamura, T. Goto, M. Tanaka, K. Matsuda, H. Iwamura

    Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals　344　307-312　2000

    DOI： 10.1080/10587250008023512 　

  338. Antiferromagnetic resonance and magnetic structure of GdAs Peer-reviewed

    Keiichi Koyama, Makoto Yoshida, Hiroyuki Nojiri, Takuo Sakon, Dexin Li, Takashi Suzuki, Mituhiro Motokawa

    Journal of the Physical Society of Japan　69　(5)　1521-1525　2000

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJ.69.1521 　

    ISSN： 0031-9015

  339. 30 T repeating pulsed field system for neutron diffraction Peer-reviewed

    H. Nojiri, M. Motokawa, K. Takahashi, M. Arai

    IEEE Transactions on Applied Superconductivity　10　(1)　534-537　2000

    DOI： 10.1109/77.828290 　

    ISSN： 1051-8223

  340. High-field ESR in one-dimensional quantum spin systems Peer-reviewed

    Y. Ajiro, T. Asano, Y. Inagaki, J. P. Boucher, S. Luther, H. Nojiri, M. Motokawa

    Physica B: Condensed Matter　284-288　(II)　1625-1626　2000

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(99)03007-0 　

    ISSN： 0921-4526

  341. High Frequency ESR Investigation on Dynamical Charge Disproportionation and Spin Gap Excitation in NaV2O5 Peer-reviewed

    Hiroyuki Nojiri, Sebastian Luther, Mitsuhiro Motokawa, Masahiko Isobe, Yutaka Ueda

    Journal of the Physical Society of Japan　69　(7)　2291-2298　2000

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJ.69.2291 　

    ISSN： 0031-9015

  342. Study of spin gap excitations in SrCu2(BO3)2 by submillimeter wave ESR Peer-reviewed

    H. Nojiri, H. Kageyama, K. Oniduka, Y. Ueda, M. Motokawa

    Physica B: Condensed Matter　284-288　(II)　1450-1451　2000

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(99)02690-3 　

    ISSN： 0921-4526

  343. Magnetic phase diagram of CsCuCl3 studied by specific heat measurements Peer-reviewed

    Masahiko Hiroi, Masafumi Sera, Hiroyuki Nojiri, Norio Kobayashi, Mitsuhiro Motokawa, Hidekazu Tanaka

    Physica B: Condensed Matter　284-288　(II)　1605-1606　2000

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(99)02704-0 　

    ISSN： 0921-4526

  344. Magnetic properties of a Heisenberg spin-ladder Cu2(C5H12N2)2Br 4 Peer-reviewed

    H. Deguchi, S. Sumoto, S. Yamamoto, S. Takagi, H. Nojiri, M. Motokawa

    Physica B: Condensed Matter　284-288　(II)　1599-1600　2000

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(99)02851-3 　

    ISSN： 0921-4526

  345. Role of orbitals in transition metal oxides Peer-reviewed

    Y. Endoh, K. Hirota, Y. Murakami, H. Nojiri, S. Ishihara, S. Maekawa, H. Kimura, T. Fukuda, S. Okamoto

    Physics and Chemistry of Transition-Metal Oxides, Springer Ser. Solid State Sci.125　125　1999/12/31

  346. dHvA Effect and Magnetic Resonance of GdAs Peer-reviewed

    Sakon Takuo, Nakanishi Yoshiki, Yoshida Makoto, Koyama Keiichi, Takahashi Fumihiko, Nojiri Hiroyuki, Li De Xin, Suzuki Takashi, Motokawa Mitsuhiro

    JJAP Series: Physics of Strongly Correlated Electron Systems　11　135-137　1999/12/30

    Publisher: Japanese Journal of Applied Physics

  347. Present and future of neutron scattering study of materials in high magnetic field Peer-reviewed

    M. Arai, H. Nojiri, M. Motokawa

    4th International Symposium on Advanced Physical Fields　1999/12

  348. High field ESR study on strongly correlated materials Peer-reviewed

    H. Nojiri, M.Motokawa

    4th International Symposium on Advanced Physical Fields　1999/12

  349. Field induced transition from metal to insulator in the colossal magneto-resistance manganites Peer-reviewed

    Y. Endoh, H. Nojiri, K. Kaneko, K. Hirota, H. Fukuda H., H. Kimura, Y. Murakami, S. Ishihara, S. Maekawa, S. Okamoto, M. Motokawa

    Materials Science and Engineering B: Solid-State Materials for Advanced Technology　63　(1)　151-158　1999/08/16

    Publisher: Elsevier Sequoia SA

    DOI： 10.1016/S0921-5107(99)00066-5 　

    ISSN： 0921-5107

  350. Magnetization of Tm monochalcogenides in high magnetic fields Peer-reviewed

    Y Nakanishi, F Takahashi, T Sakon, H Nojiri, M Motokawa, T Matsumura, T Suzuki

    PHYSICA B-CONDENSED MATTER　259-61　329-331　1999/01

    DOI： 10.1016/S0921-4526(98)01002-3 　

    ISSN： 0921-4526

    eISSN： 1873-2135

  351. Submillimeter wave ESR study of magnetic excitations in the ising ferromagnetic chain CoNb2O6 Peer-reviewed

    Takashi Kunimoto, Keigo Nagasaka, Hiroyuki Noriji, Sebastian Luther, Mitsuhiro Motokawa, Hitoshi Ohta, Tomohiro Goto, SusuMu Okubo, Kay Kohn

    Journal of the Physical Society of Japan　68　(5)　1703-1710　1999

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJ.68.1703 　

    ISSN： 0031-9015

  352. Magnetic phase diagram of CrTe1-xSbx (0.0≤x≤1.0) Peer-reviewed

    N. Suzuki, T. Kanomata, R. Konno, T. Kaneko, H. Yamauchi, K. Koyama, H. Nojiri, Y. Yamaguchi, M. Motokawa

    Journal of Alloys and Compounds　290　(1-2)　25-29　1999

    Publisher: Elsevier BV

    DOI： 10.1016/S0925-8388(99)00244-3 　

    ISSN： 0925-8388

  353. Submillimeter Wave ESR Study of Spin Gap Excitations in CuGeO3 Peer-reviewed

    Hiroyuki Nojiri, Hitoshi Ohta, Susumu Okubo, Osamu Fujita, Jun Akimitsu, Mitsuhiro Motokawa

    Journal of the Physical Society of Japan　68　(10)　3417-3423　1999

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJ.68.3417 　

    ISSN： 0031-9015

  354. Submillimeter wave ESR and high-field magnetization measurements of aligned powder sample of Nd2BaNiO5 Peer-reviewed

    S. Okubo, H. Ohta, M. Hayashi, T. Yamada, H. Nojiri, T. Sakon, M. Motokawa, I. Mogi, K. Watanabe, H. Kikuchi, H. Nagasawa, N. Kitamura

    Physica Status Solidi (B) Basic Research　215　(2)　1099-1107　1999

    Publisher: Wiley-VCH Verlag

    DOI： 10.1002/(SICI)1521-3951(199910)215:2<1099::AID-PSSB1099>3.0.CO;2-2 　

    ISSN： 0370-1972

  355. Antiferromagnetic resonance measurements of MgCu2O3 in the submillimeter wave region Peer-reviewed

    H. Ohta, M. Hayashi, N. Arai, H. Nojiri, M. Motokawa, N. Kitamura, S. Kimura

    Physica Status Solidi (B) Basic Research　211　(2)　781-788　1999

    Publisher: Wiley-VCH Verlag

    DOI： 10.1002/(SICI)1521-3951(199902)211:2<781::AID-PSSB781>3.0.CO;2-E 　

    ISSN： 0370-1972

  356. Transition between Two Ferromagnetic States Driven by Orbital Ordering in La0.88 Sr0.12 MnO3 Peer-reviewed

    Y. Endoh, K. Hirota, S. Ishihara, S. Okamoto, Y. Murakami, A. Nishizawa, T. Fukuda, H. Kimura, H. Nojiri, K. Kaneko, S. Maekawa

    Physical Review Letters　82　(21)　4328-4331　1999

    DOI： 10.1103/PhysRevLett.82.4328 　

    ISSN： 1079-7114 0031-9007

  357. Anisotropies in the magnetotransport properties of quasi-two-dimensional η-Mo4O11 crystals Peer-reviewed

    Minoru Sasaki, Naoki Miyajima, Hiroshi Negishi, Wen-Xiu Gao, Masasi Inoue, Hideoki Kadomatsu, Gordon Machel, Hiroyuki Nojiri, Mitsuhiro Motokawa

    Journal of the Physical Society of Japan　68　(2)　539-547　1999

    Publisher: Physical Society of Japan

    DOI： 10.1143/JPSJ.68.539 　

    ISSN： 0031-9015

  358. Magnetic properties of CexLa1-xSb and CexY1-xP in high magnetic fields Peer-reviewed

    T. Sakon, A. Kobayashi, M. Kubota, Y. Nakanishi, H. Nojiri, S. Mitsudo, S. Takagi, T. Suzuki, M. Motokawa

    Physica B: Condensed Matter　259-261　300-302　1999

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(98)00961-2 　

    ISSN： 0921-4526

  359. Spin-lattice relaxation of paramagnetic spin in phosphate glass under high magnetic field Peer-reviewed

    N. Kitamura, I. Matsubara, R. Funahashi, H. Ohta, H. Nojiri, S. Mitsudo, T. Sakon, M. Motokawa

    Physica B: Condensed Matter　263-264　303-305　1999

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0921-4526(98)01364-7 　

    ISSN： 0921-4526

  360. ESR study of Mn doped II-VI and III-V DMS Peer-reviewed

    H Nojiri, M Motokawa, S Takeyama, F Matsukura, H Ohno

    PHYSICA B-CONDENSED MATTER　256　569-572　1998/12

    DOI： 10.1016/S0921-4526(98)00504-3 　

    ISSN： 0921-4526

  361. Field induced orbital ordering in La0.88Sr0.12MnO3 Peer-reviewed

    H. Nojiri, K. Kaneko, M. Motokawa, K. Hirota, Y. Endoh

    Physical Problems at High Magnetic Fields III　1998/12

  362. Magnetic-field-induced electronic phase transitions in semimetals in high magnetic fields Peer-reviewed

    Y Shimamoto, N Miura, H Nojiri

    JOURNAL OF PHYSICS-CONDENSED MATTER　10　(49)　11289-11300　1998/12

    DOI： 10.1088/0953-8984/10/49/018 　

    ISSN： 0953-8984

  363. Magnetic phase diagrams of CuGe1-xSixO3 studied by specific heat measurements Peer-reviewed

    M. Hiroi, T. Hamamoto, M. Sera, H. Nojiri, N. Kobayashi, M. Motokawa, O. Fujita, A. Ogiwara, J. Akimitsu

    Physica B: Condensed Matter　246-247　242-245　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00906-X 　

    ISSN： 0921-4526

  364. Neutron diffraction experiments in repeating pulsed high magnetic fields Peer-reviewed

    H. Nojiri, K. Takahashi, T. Fukuda, N. Arai, M. Arai, M. Motokawa

    Physica B: Condensed Matter　246-247　175-178　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(98)00004-0 　

    ISSN： 0921-4526

  365. Anomalous temperature dependence of the cyclotron mass in n-type CdS at ultra-high magnetic fields Peer-reviewed

    Y. Imanaka, N. Miura, H. Nojiri

    Physica B: Condensed Matter　246-247　328-332　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00927-7 　

    ISSN： 0921-4526

  366. Exchange splitting of EPR spectra in CuGeO3 under ultra-high magnetic fields - Theoretical analysis Peer-reviewed

    S. Kokado, H. Nojiri, N. Miura, N. Suzuki

    Physica B: Condensed Matter　246-247　238-241　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00905-8 　

    ISSN： 0921-4526

  367. Study of spin-Peierls CuGeO3 by high-field ESR Peer-reviewed

    H. Nojiri, H. Ohta, N. Miura, M. Motokawa

    Physica B: Condensed Matter　246-247　16-21　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(98)00019-2 　

    ISSN： 0921-4526

  368. Submillimeter wave ESR study on triangular lattice antiferromagnet CuFeO2 Peer-reviewed

    T. Fukuda, H. Nojiri, M. Motokawa, T. Asano, M. Mekata, Y. Ajiro

    Physica B: Condensed Matter　246-247　569-571　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00989-7 　

    ISSN： 0921-4526

  369. ESR study of the Haldane gap system Y2BaNiO5 in high magnetic fields Peer-reviewed

    Y. Imanaka, N. Miura, H. Nojiri, S. Luther, M. V. Ortenberg, T. Yokoo, J. Akimitsu

    Physica B: Condensed Matter　246-247　561-564　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00987-3 　

    ISSN： 0921-4526

  370. High-frequency high-field ESR of quantum double spin chain systems KCuCl3 and TlCuCl3 Peer-reviewed

    H. Tanaka, T. Takatsu, W. Shiramura, T. Kambe, H. Nojiri, T. Yamada, S. Okubo, H. Ohta, M. Motokawa

    Physica B: Condensed Matter　246-247　545-548　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00982-4 　

    ISSN： 0921-4526

  371. Cyclotron resonance experiments in Yb4(As0.6P0.4)3 and Yb4(As0.71Sb0.29)3 Peer-reviewed

    R. Pittini, H. Nojiri, M. Motokawa, A. Ochiai, T. Suzuki

    Physica B: Condensed Matter　246-247　452-455　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00959-9 　

    ISSN： 0921-4526

  372. High field AFMR measurement of Bi2CuO4 Peer-reviewed

    H. Ohta, Y. Ikeuchi, S. Kimura, S. Okubo, H. Nojiri, M. Motokawa, S. Hosoya, K. Yamada, Y. Endoh

    Physica B: Condensed Matter　246-247　557-560　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00986-1 　

    ISSN： 0921-4526

  373. Submillimeter wave ESR of an S = 1 bond alternating chain Ni2(μ-C2O4)(μ-N3)(dPt) 2(PF6) Peer-reviewed

    S. Kimura, S. Hayashi, H. Ohta, H. Kikuchi, H. Nagasawa, H. Nojiri, M. Motokawa

    Physica B: Condensed Matter　246-247　565-568　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00988-5 　

    ISSN： 0921-4526

  374. Magnetization of Ce3Pd20Ge6 in high magnetic fields Peer-reviewed

    T. Sakon, H. Nojiri, A. Ishiguro, N. Tateiwa, A. Sawada, T. Komatsubara, M. Motokawa

    Physica B: Condensed Matter　246-247　448-451　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00958-7 　

    ISSN： 0921-4526

  375. Recent developments at the high-field laboratory of Tohoku University Peer-reviewed

    M. Motokawa, K. Watanabe, S. Miura, S. Awaji, H. Nojiri, I. Mogi, S. Mitsudo, T. Sakon

    Physica B: Condensed Matter　246-247　360-363　1998/05/29

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00935-6 　

    ISSN： 0921-4526

  376. Magnetization and dHvA effect study of the rare-earth monopnictides in high magnetic fields Peer-reviewed

    T Sakon, Y Nakanishi, M Ozawa, H Nojiri, T Suzuki, M Motokawa

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　177　355-356　1998/01

    DOI： 10.1016/S0304-8853(97)00950-5 　

    ISSN： 0304-8853

  377. ESR study of the field-induced magnetic phase of spin-Peierls CuGeO3 and MEM(TCNQ)2 Peer-reviewed

    H. Nojiri, T. Hamamoto, O. Fujita, J. Akimitsu, S. Takagi, M. Motokawa

    Journal of Magnetism and Magnetic Materials　177-181　(1)　687-688　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00390-9 　

    ISSN： 0304-8853

  378. Magnetoresistance and high-field magnetization of Ce0.5La0.5B6 and Ce0.7La0.3B6 single crystals Peer-reviewed

    M. Hiroi, M. Sera, T. Sakon, H. Nojiri, N. Kobayashi, M. Motokawa, S. Kunii

    Journal of Magnetism and Magnetic Materials　177-181　(1)　429-430　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00973-6 　

    ISSN： 0304-8853

  379. ESR of quantum double-spin-chain systems KCuCl3 and TlCuCl3 Peer-reviewed

    K. Takatsu, W. Shiramura, H. Tanaka, T. Kambe, H. Nojiri, M. Motokawa

    Journal of Magnetism and Magnetic Materials　177-181　(1)　697-698　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00442-3 　

    ISSN： 0304-8853

  380. Neutron-scattering study of DyB6 Peer-reviewed

    K. Takahashi, H. Nojiri, K. Ohoyama, M. Ohashi, Y. Yamaguchi, M. Motokawa, S. Kunii

    Journal of Magnetism and Magnetic Materials　177-181　(2)　1097-1098　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00968-2 　

    ISSN： 0304-8853

  381. Nonmagnetic Impurity Effects on S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4 Peer-reviewed

    Hiroyuki Deguchi, Shunsaku Sumoto, Seishi Takagi, Masaki Mito, Tatsuya Kawae, Kazuyoshi Takeda, Hiroyuki Nojiri, Takuo Sakon, Mitsuhiro Motokawa, Kazuyoshi Takeda

    Journal of the Physical Society of Japan　67　(11)　3707-3710　1998

    DOI： 10.1143/JPSJ.67.3707 　

    ISSN： 1347-4073 0031-9015

  382. Exchange splitting in under ultrahigh magnetic fields Peer-reviewed

    H. Nojiri, Y. Shimamoto, N. Miura, M. Hase, K. Uchinokura

    Physical Review B - Condensed Matter and Materials Physics　57　(17)　10276-10279　1998

    DOI： 10.1103/PhysRevB.57.10276 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  383. Submillimeter wave ESR measurement of LaMnO3 Peer-reviewed

    S. Mitsudo, K. Hirano, H. Nojiri, M. Motokawa, K. Hirota, A. Nishizawa, N. Kaneko, Y. Endoh

    Journal of Magnetism and Magnetic Materials　177-181　(2)　877-878　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00525-8 　

    ISSN： 0304-8853

  384. Submillimeter wave ESR of S = 1 antiferromagnetic Heisenberg chain system with bond alternation Peer-reviewed

    S. Hayashi, S. Kimura, H. Ohta, H. Kikuchi, H. Nagasawa, H. Nojiri, M. Motokawa

    Journal of Magnetism and Magnetic Materials　177-181　(1)　667-668　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00410-1 　

    ISSN： 0304-8853

  385. Direct Observation of the Spin Gap in NaV2O5 by Submillimeter Wave ESR Peer-reviewed

    Sebastian Luther, Hiroyuki Nojiri, Mitsuhiro Motokawa, Masahiko Isobe, Yutaka Ueda, Sebastian Luther, Hiroyuki Nojiri

    Journal of the Physical Society of Japan　67　(11)　3715-3717　1998

    DOI： 10.1143/JPSJ.67.3715 　

    ISSN： 1347-4073 0031-9015

  386. ESR study of Fe-doped Isolated spin state of and anomalous D parameter caused by exchange interaction Peer-reviewed

    H. Kageyama, K. Yoshimura, K. Kosuge, H. Nojiri, K. Owari, M. Motokawa

    Physical Review B - Condensed Matter and Materials Physics　58　(17)　11150-11152　1998

    DOI： 10.1103/PhysRevB.58.11150 　

    ISSN： 1550-235X 1098-0121

  387. Magnetic properties of CeSi single crystal Peer-reviewed

    Satoru Noguchi, Kiichi Okuda, Hiroyuki Nojiri, Mitsuhiro Motokawa

    Journal of Magnetism and Magnetic Materials　177-181　(1)　403-404　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00486-1 　

    ISSN： 0304-8853

  388. Magnetic and electronic state of Co in LaCoO3 Peer-reviewed

    K. Okuda, S. Kawamata, K. Nakahigashi, H. Ishibashi, M. Hayashi, H. Ohta, H. Nojiri, M. Motokawa

    Journal of Magnetism and Magnetic Materials　177-181　(2)　1375-1376　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00455-1 　

    ISSN： 0304-8853

  389. Metamagnetic transition in Y2Cu2O5 Peer-reviewed

    Y. Matsuoka, Y. Nishimura, S. Mitsudo, H. Nojiri, H. Komatsu, M. Motokawa, K. Kakurai, K. Nakajima, Y. Karasawa, N. Niimura

    Journal of Magnetism and Magnetic Materials　177-181　(1)　729-730　1998

    Publisher: Elsevier

    DOI： 10.1016/S0304-8853(97)00395-8 　

    ISSN： 0304-8853

  390. Magnetic Phase Diagram and Antiferromagnetic Resonance in CuGe1-xSixO3 Peer-reviewed

    Nojiri Hiroyuki, Hamamoto Terufumi, Wang Zhang Jie, Mitsudo Seitaro, Motokawa Mitsuhiro, Kimura Shojiro, Ohta Hitoshi, Ogiwara A

    Journal of Physics : Condensed Matter　9　1331-1338　1997/12/31

  391. Unusual antiferromagnetic state in Si-doped CuGeO3 single crystals studied by specific-heat measurements in magnetic fields Peer-reviewed

    M Hiroi, T Hamamoto, M Sera, H Nojiri, N Kobayashi, M Motokawa, O Fujita, A Ogiwara, J Akimitsu

    PHYSICAL REVIEW B　55　(10)　R6125-R6128　1997/03

    ISSN： 2469-9950

    eISSN： 2469-9969

  392. Cyclotron resonance of conduction electrons in GaAs at very high magnetic fields Peer-reviewed

    N. Miura, H. Nojiri, P. Pfeffer, W. Zawadzki

    Physical Review B - Condensed Matter and Materials Physics　55　(20)　13598-13604　1997

    DOI： 10.1103/PhysRevB.55.13598 　

    ISSN： 1550-235X 1098-0121

  393. Unusual antiferromagnetic state in Si-dopedssingle crystals studied by specific-heat measurements in magnetic fields Peer-reviewed

    M. Hiroi, T. Hamamoto, M. Sera, H. Nojiri, N. Kobayashi, M. Motokawa, O. Fujita, A. Ogiwara, J. Akimitsu

    Physical Review B - Condensed Matter and Materials Physics　55　(10)　R6125-R6128　1997

    DOI： 10.1103/PhysRevB.55.R6125 　

    ISSN： 1550-235X 1098-0121

  394. Ferromagnetic-antiferromagnetic transition of itinerant electron magnets Mn3-xFexSi Peer-reviewed

    H. Miki, K. Ohoyama, H. Onodera, H. Yamauchi, Y. Yamaguchi, H. Nojiri, M. Motokawa, S. Funahashi, S. Tomiyoshi

    Physica B: Condensed Matter　237-238　465-466　1997

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00146-4 　

    ISSN： 0921-4526

  395. 25 T repeating pulsed magnetic fields system for neutron diffraction experiments Peer-reviewed

    H. Nojiri, K. Takahashi, T. Fukuda, M. Fujita, M. Arai, M. Motokawa

    Physica B: Condensed Matter　241-243　210-212　1997

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00864-8 　

    ISSN： 0921-4526

  396. Magnetic and structural phase transition in heavy rare-earth compound DyB6 Peer-reviewed

    K. Takahashi, H. Nojiri, K. Ohoyama, M. Ohashi, Y. Yamaguchi, S. Kunii, M. Motokawa

    Physica B: Condensed Matter　241-243　696-698　1997

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(97)00695-9 　

    ISSN： 0921-4526

  397. dHvA effect of DySb in quadrupole ordered state Peer-reviewed

    M. Ozawa, T. Matsumura, A. Uesawa, T. Suzuki, T. Sakon, Y. Nakanishi, H. Nojiri, M. Motokawa

    Physica B: Condensed Matter　230-232　744-747　1997

    Publisher: Elsevier

    DOI： 10.1016/S0921-4526(96)00827-7 　

    ISSN： 0921-4526

  398. Infrared radiation in high magnetic spectroscopy of solids Peer-reviewed

    N. Miura, Y. Imanaka, H. Arimoto, Y. Shimamoto, H. Nojiri

    Semiconductor Science and Technology　1996/12

  399. Low dimensional systems of semiconductors and magnetic materials in very high magnetic fields up to 500 T Peer-reviewed

    N. Miura, H. Nojiri

    Physical Phenomena at High Magnetic Fields-II　1996/12

  400. Production of megagauss fields and their application to solid state physics Peer-reviewed

    N. Miura, H. Nojiri, T. Takamasu, K. Uchida, S. Todo, T. Haruyama, Y. Shimamoto, Y. Imanaka, H. Kunimatsu, H. Nakagawa, H. Arimoto

    Proceeding for the 7th International Conference on Megagauss Magnetic Fields Generation and Related　1996/12

  401. Investigation of HgSe/HgSe: Fe quantum wells and super lattices Peer-reviewed

    M. Von Ortenberg, O. Portugall, N. Puhlmann, H. U. Mueller, S. Luther, M. Barczewski, G. Machel, M. Thiede, Y. Imanaka, Y. Shimamoto, H. Nojiri, N. Miura, D. Schikora, T. Widmer, K. Lischka

    Physica B: Condensed Matter　216　(3-4)　384-387　1996/01/01

    Publisher: Elsevier

    DOI： 10.1016/0921-4526(95)00523-4 　

    ISSN： 0921-4526

  402. Cu-Ag alloy bitter type magnet for repeating pulsed field Peer-reviewed

    M. Motokawa, H. Nojiri, S. Mitsudo, M. Arai, K. Ubukata, M. Fujita, T. Arakawa, Y. Inamura

    IEEE Transactions on Magnetics　32　(4)　2534-2537　1996

    DOI： 10.1109/20.511389 　

    ISSN： 0018-9464

  403. Recent advances in megagauss physics Peer-reviewed

    N. Miura, H. Nojiri

    Physica B: Condensed Matter　216　(3-4)　153-157　1996/01/01

    Publisher: Elsevier

    DOI： 10.1016/0921-4526(95)00461-0 　

    ISSN： 0921-4526

  404. Low-dimensional systems in ultra-high magnetic fields: Magnetic-field-induced type I to type Il transitions in short-period semiconductor superlattices Peer-reviewed

    N. Miura, Y. Shimamoto, Y. Imanaka, H. Arimoto, H. Nojiri, H. Kunimatsu, K. Uchida, T. Fukuda, K. Yamanaka, H. Momose, N. Mori, C. Hamaguchi

    Semiconductor Science and Technology　11　(11)　1586-1590　1996

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/0268-1242/11/11S/023 　

    ISSN： 0268-1242

  405. Faraday rotation and magnetization in CuGeO<inf>3</inf> in ultra-high magnetic fields Peer-reviewed

    H. Nojiri, Y. Shimamoto, N. Miura, M. Hase, K. Uchinokura, H. Kojima, I. Tanaka, Y. Shibuya

    Physica B: Physics of Condensed Matter　211　(1-4)　184-186　1995/05/01

    DOI： 10.1016/0921-4526(94)00980-A 　

    ISSN： 0921-4526

  406. Solid state experiments in megagauss fields Peer-reviewed

    N. Miura, H. Nojiri, Y. Shimamoto, Y. Imanaka

    Physica B: Physics of Condensed Matter　211　(1-4)　23-29　1995/05/01

    DOI： 10.1016/0921-4526(94)00931-K 　

    ISSN： 0921-4526

  407. High field differential susceptibility of the alloys Ce(Co1-xNix)2 Peer-reviewed

    J. M. Machado da Silva, M. Motokawa, H. Nojiri, J. B. Oliveira

    Journal of Magnetism and Magnetic Materials　146　(3)　319-322　1995/05/01

    DOI： 10.1016/0304-8853(94)01634-8 　

    ISSN： 0304-8853

  408. Cyclotron resonance in II-VI compounds at high magnetic fields and their bare and polaron masses Invited Peer-reviewed

    N MIURA, Y IMANAKA, H NOJIRI

    II-VI COMPOUNDS AND SEMIMAGNETIC SEMICONDUCTORS　182-　287-290　1995

    ISSN： 0255-5476

  409. Observation of magnetization saturation in the S=1 one-dimensional Heisenberg antiferromagnets Ni(C2H8N2) 2NO2(ClO4) and CsNiCl3 Peer-reviewed

    H. Nojiri, Y. Shimamoto, N. Miura, Y. Ajiro

    Journal of Physics: Condensed Matter　7　(29)　5881-5890　1995

    DOI： 10.1088/0953-8984/7/29/015 　

    ISSN： 0953-8984

  410. Observation of magnetization saturation of CuGeO3 in ultrahigh magnetic fields up to 500 T Peer-reviewed

    H. Nojiri, Y. Shimamoto, N. Miura, M. Hase, K. Uchinokura, H. Kojima, I. Tanaka, Y. Shibuya

    Physical Review B　52　(17)　12749-12754　1995

    DOI： 10.1103/PhysRevB.52.12749 　

    ISSN： 0163-1829

  411. Infrared and millimeter wave magneto-spectroscopy of semiconductors in pulsed high magnetic fields in the megagauss range Peer-reviewed

    N. Miura, H. Nojiri, Y. Imanaka, Y. Shimamoto, T. Takamasu

    Proceedings of 3rd. Int. Conf. Millimeter-Wave and Far-Infrared Science and Technology　1994/12

  412. Infrared magnetospectroscopy in graphite under pulsed ultrahigh magnetic fields Peer-reviewed

    Y. Shimamoto, H. Nojiri, N. Miura

    Proceedings of Application of High Magnetic Fields in Semiconductor Physics　1994/12

  413. Generation of 500 T fields by electromagnetic flux compression and their application to cyclotron resonance experiments Peer-reviewed

    H. Nojiri, T. Takamasu, S. Todo, K. Uchida, T. Haruyama, H. A. Katori, T. Goto, N. Miura

    Physica B: Physics of Condensed Matter　201　(C)　579-583　1994

    DOI： 10.1016/0921-4526(94)91165-7 　

    ISSN： 0921-4526

  414. Relaxation measurements of flux pinning by a double pulsed field Peer-reviewed

    M. Motokawa, H. Nojiri, M. Mino, T. Bokui

    Physica B: Physics of Condensed Matter　184　(1-4)　522-525　1993

    DOI： 10.1016/0921-4526(93)90408-X 　

    ISSN： 0921-4526

  415. Neutron diffraction study on metamagnetic PrCo2Si2 in pulsed high magnetic fields Peer-reviewed

    M. Motokawa, H. Nojiri, Y. Endoh

    Physica B　177　279-285　1992/12/31

  416. Thermal and magnetic properties of M(HCOO)22UREA:M=Mn, Fe, Co, Ni Peer-reviewed

    K. Yamagata, T. Abe, Y. Higuchi, H. Deguchi, K. Takeda, K. Kaneko, H. Nojiri, M. Motokawa

    J. Magn. Magn. Mater.　104-107　803-804　1992/12/31

  417. Application of megagauss fields to magneto-optical study of semiconductors Peer-reviewed

    N. Miura, S. Sasaki, J. Kono, K. Uchida, T. Takamasu, H. Nojiri, O. Portugall, D. J. Barnes, R. J. Nicholas

    Proceedings of 6th International Conference on Megagauss Field Generation and Related Topics　1992/12

  418. Infrared and far-infrared magneto-spectroscopy of semiconductors in high magnetic fields in the megagauss range Peer-reviewed

    N. Miura, J. Kono, O. Portugall, Y. Imanaka, D. J. Barnes, H. Nojiri, T. Takamasu, H. Yokoi, S. Takeyama

    Conference Digest of the 17th. Int. Conf. Infrared and Millimeter Waves　1992/12

  419. NEUTRON-DIFFRACTION EXPERIMENTS IN A PULSED HIGH MAGNETIC-FIELD Peer-reviewed

    H NOJIRI, M MOTOKAWA, N NISHIDA, Y ENDOH

    PHYSICA B　180　31-33　1992/06

    DOI： 10.1016/0921-4526(92)90651-8 　

    ISSN： 0921-4526

  420. MU-SR STUDY OF NI(C2H8N2)2NO2CLO4 IN PULSED HIGH MAGNETIC-FIELDS Peer-reviewed

    M MOTOKAWA, H NOJIRI, K NISHIYAMA, K NAGAMINE, T YOSIDA

    PHYSICA B　177　(1-4)　389-392　1992/03

    DOI： 10.1016/0921-4526(92)90135-F 　

    ISSN： 0921-4526

  421. MU-SR STUDY OF PRCO2SI2 IN PULSED HIGH MAGNETIC-FIELD Peer-reviewed

    H NOJIRI, M MOTOKAWA, K NISHIYAMA, K NAGAMINE, T SHIGEOKA

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　104　1311-1312　1992/02

    ISSN： 0304-8853

  422. Neutron Diffraction Study of PrCo2Si2 in Pulsed High Magnetic Field Peer-reviewed

    Hiroyuki Nojiri, Makoto Uchi, Sigeki Watamura, Mitsuhiro Motokawa, Hideo Kawai, Yasuo Endoh, Toru Shigeoka

    Journal of the Physical Society of Japan　60　(7)　2380-2387　1991

    DOI： 10.1143/JPSJ.60.2380 　

    ISSN： 1347-4073 0031-9015

  423. Magnetization Curves for Co(HCOO)2∗2urea Peer-reviewed

    Kazuo Yamagata, Hiroyuki Nojiri, Shigeki Watamura, Mitsuhiro Motokawa

    Journal of the Physical Society of Japan　60　(3)　1140-1141　1991

    DOI： 10.1143/JPSJ.60.1140 　

    ISSN： 1347-4073 0031-9015

  424. Influence of silver on critical current of the Y-Ba-Cu-0 superconductor Peer-reviewed

    Mineo Itoh, Hiroyuki Nojiri, Takashi Ohyama, Takumi Minemoto, Mitsuhiro Motokawa

    Journal of Materials Research　6　(11)　2272-2279　1991

    DOI： 10.1557/JMR.1991.2272 　

    ISSN： 2044-5326 0884-2914

  425. MU-SR EXPERIMENTS IN PULSED MAGNETIC-FIELDS Peer-reviewed

    M MOTOKAWA, H NOJIRI, M UCHI, K NISHIYAMA, K NAGAMINE

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　90-1　773-774　1990/12

    ISSN： 0304-8853

  426. MAGNETIZATION MEASUREMENT OF MN(HCOO)2.2UREA AND CO(HCOO)2.2UREA Peer-reviewed

    K YAMAGATA, H NOJIRI, S WATAMURA, M MOTOKAWA

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　90-1　151-152　1990/12

    DOI： 10.1016/S0304-8853(10)80049-6 　

    ISSN： 0304-8853

  427. APPLICATION OF PULSED HIGH MAGNETIC-FIELD TO MU-SR STUDIES Peer-reviewed

    M MOTOKAWA, H NOJIRI, M UCHI, S WATAMURA, K NISHIYAMA, K NAGAMINE

    HYPERFINE INTERACTIONS　65　(1-4)　1089-1095　1990

    ISSN： 0304-3843

  428. PRODUCTION OF REPEATING PULSED HIGH MAGNETIC-FIELD Peer-reviewed

    M MOTOKAWA, H NOJIRI, J ISHIHARA, K OHNISHI

    PHYSICA B　155　(1-3)　39-42　1989/03

    DOI： 10.1016/0921-4526(89)90458-4 　

    ISSN： 0921-4526

  429. An idea for the easy construction of a high field magnet Peer-reviewed

    M. Motokawa, H. Nojiri, Y. Tokunaga

    Physica B: Physics of Condensed Matter　155　(1-3)　96-99　1989

    DOI： 10.1016/0921-4526(89)90473-0 　

    ISSN： 0921-4526

  430. MAGNETIC PHASE-TRANSITION OF HELICAL CSCUCL3 IN HIGH MAGNETIC-FIELD Peer-reviewed

    H NOJIRI, Y TOKUNAGA, M MOTOKAWA

    JOURNAL DE PHYSIQUE　49　(C-8)　1459-1460　1988/12

    ISSN： 0302-0738

  431. Magnetic ordering of K2CuF4 and the randomly mixed systems-an observation of magnetic domain by Faraday Effect at low temperature Peer-reviewed

    M. Matsuura, H. Nojiri, M. Watanabe, I. Yamada

    J. Magn. Soc. Jpn.　11　91-94　1987/12/31

    DOI： 10.3379/jmsjmag.11.S1_91 　

  432. MAGNETIZATION MEASUREMENTS OF FE1-XCOXSI Peer-reviewed

    M MOTOKAWA, S KAWARAZAKI, H NOJIRI, T INOUE

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　70　(1-3)　245-246　1987/12

    DOI： 10.1016/0304-8853(87)90425-2 　

    ISSN： 0304-8853

Show all ︎Show first 5

Misc. 15

  1. Inside Back Cover: Studies on the Magnetic Ground State of a Spin Möbius Strip (Chem. Eur. J. 40/2016) Peer-reviewed

    Graham N. Newton, Norihisa Hoshino, Takuto Matsumoto, Takuya Shiga, Motohiro Nakano, Hiroyuki Nojiri, Wolfgang Wernsdorfer, Yuji Furukawa, Hiroki Oshio

    Chemistry - A European Journal　22　(40)　14407　2016/09/26

    DOI： 10.1002/chem.201603414 　

    ISSN： 0947-6539

    eISSN： 1521-3765

  2. X-ray Spectroscopies in Pulsed High Magnetic Fields: New Frontier with Flying Magnets and Rolling Capacitor Banks

    Y. Narumi, T. Nakamura, T. Kinoshita, Y. H. Matsuda, H. Nojiri

    Synchrotron Radiation News　25　(6)　12-17　2012/11

    Publisher: Taylor & Francis

    DOI： 10.1080/08940886.2012.736833 　

    ISSN： 0894-0886 1931-7344

  3. Precision X-ray Diffraction Studies in High Pulsed Magnetic Fields at the Advanced Photon Source

    Zahirul Islam, Hiroyuki Nojiri, Jacob P. C. Ruff, Ritesh K. Das, Dana Capatina, Jonathan C. Lang

    Synchrotron Radiation News　25　(6)　5-9　2012/11

    Publisher: Taylor & Francis

    DOI： 10.1080/08940886.2012.736830 　

    ISSN： 0894-0886 1931-7344

  4. THz Electron Spin Resonance on Nanomagnets

    H. Nojiri, Z. W. Ouyang

    Terahertz Sci. Technol.　5　1-10　2012/03/31

  5. Evaluation of Exchange Interaction of Rare-Earth Nanomagnets

    T. Ishida, H. Nojiri, S. Yoshii, G. Tanaka

    NanotechJapan Bulletin　4　(3)　1-10　2011/06/22

  6. J-PARCの拓く凝縮系科学

    野尻浩之

    固体物理　43　(7)　441-450　2008/07/15

    Publisher: アグネ技術センタ-

    ISSN： 0454-4544

  7. 強磁場スピン科学の新展開－ナノ分子磁石から量子ビームまで－

    野尻浩之

    第52回物性若手夏の学校(2007年度),講義ノート　89　(6)　844-862　2008/03/20

    Publisher: 物性研究刊行会

    ISSN： 0525-2997

  8. 強磁場スピン科学の新展開 - ナノ分子磁石から量子ビームまで-

    野尻浩之

    物性研究　89　(6)　2008/03

  9. テラヘルツESRのナノ分子磁性体への応用

    野尻浩之

    日本赤外線学会誌　16　(2)　30-34　2007/10

    Publisher: 日本赤外線学会

    ISSN： 0916-7900

  10. THz Magneto-Spectroscopy Using a Portable Pulsed Magnet

    Y. H. Matsuda, Y. Ueda, H. Nojiri, T. Takahashi

    Conf. Digest 28th Int. Conf. Infrared and Millimeter Waves　111-112　2003

  11. 低次元量子スピン系の強磁場ESR-スピンギャップの直接観測

    野尻浩之

    物性研究 特集号　74　(4)　438-448　2000/12

    Publisher: 物性研究刊行会

    ISSN： 0525-2997

  12. ESRでみる量子ゆらぎと磁気励起

    野尻浩之

    波紋　10　(3)　18-24　2000/12

    Publisher: The Japanese Society for Neutron Science

    DOI： 10.5611/hamon.10.3_18 　

    ISSN： 1349-046X

  13. 高周波ESRによる磁気励起の研究

    野尻 浩之

    波紋　8　(2)　20-21　1998

    Publisher: The Japanese Society for Neutron Science

    DOI： 10.5611/hamon.8.2_20 　

    ISSN： 1349-046X

  14. 強磁場スピン緩和

    本河光博, 野尻浩之

    固体物理　26　(11)　765-770　1991/12/31

  15. 氷を用いたパルスマグネットの補強

    本河光博, 野尻浩之

    固体物理　24　(9)　24-29　1989/12/31

Show all ︎Show first 5

Books and Other Publications 3

  1. Generation and Application of High Magnetic Fields

    三浦登, 近角聰信, 井上廉, 前田弘, 木吉司, 中川康昭, Fritz Herlach, 伊達宗行, 金道浩一, 本河光博, 野尻浩之, 松田康弘, 木戸義勇, 榊原俊郎, 後藤恒昭, 高増正, 長田俊人, 内田和人, 黒田規敬, 大久保晋

    共立出版株式会社　2008/08/10

  2. Application of Submillemeter wave electron spin resonance for novel magnetic systems

    H. Ohta, H. Nojiri, M. Motokawa

    2003/12

  3. 丸善実験物理学講座 基礎技術II

    本河光博, 野尻浩之

    1999/12

Presentations 60

  1. Compact Pulsed Magnetic Field for Quantum;Beam Experiments Invited

    Hiroyuki Nojiri

    Asia-Pacific Conference in Condensed Matter Phys 2024　2024/12/09

  2. ESR Study of Exchange-bias Fields in Hetero Spin System Invited

    Hiroyuki Nojiri

    Asia-Pacific EPR-ESR Conference 2024　2024/10/21

  3. Application of THz ESR on Molecular Based Magnets Invited

    H. Nojiri

    Asia-Pacific EPR/ESR Symposium 2022　2022/11/07

  4. High Magnetic Field X-ray Experiments with XFEL and Synchrotron Radiation

    H. Nojiri

    15th Asia-Pacific Physics Conference　2022/08/25

  5. X-ray diffractions and spectroscopies in low reduced temperatures Invited

    H. Nojiri

    HMF Future Science Workshop　2022/08/03

  6. X-ray and high magnetic fields-probing extreme states of correlated electrons systems Invited

    H. Nojiri

    HIBEF Scientific Symposium　2021/08/31

  7. Development of X-ray Diffraction in High Magnetic Fields and Applications to Oxides High-Tc Superconductors

    H. Nojiri

    SACLA user meeting 2020　2021/03/11

  8. Progress in High Magnetic Field XFEL Experiments Invited

    H. Nojiri

    14Th ASIA-PACIFIC PHYSICS CONFERENCE　2019/11/20

  9. Progress in High Magnetic Field SR and XFEL Experiments

    H. Nojiri

    14th Asia-Pacific Physics Conference　2019/11/20

  10. Scattering experiments in high magnetic fields-past and next 10 years

    H. Nojiri

    10th Ringberg Workshop on Science with FELs – from first results to future perspectives　2019/02/26

  11. Quantum Beam Experiments in Strong Magnetic Fields Generated by a Portable Capacitor Bank International-presentation

    Hiroyuki Nojiri

    16th International Conference on Megagauss Magnetic Field Generation and Related Topics (MG-XVI)　2018/09/26

  12. Recent Progress in High Magnetic Field Science at SR and XFEL Sources

    H. Nojiri

    Kick Off Meeting for the Helmholtz International Beamline for Extreme Fields (HIBEF) at the European XFEL”　2018/06/03

  13. Recent Progress in High Magnetic Field Science at SR and XFEL Sources International-presentation Invited

    H. Nojiri

    X-ray Diffraction and Spectroscopy in Very High Magnetic Fields at the Helmholtz Beamline for Extreme Fields　2018/01/22

  14. Neutron Diffraction Experiments in Pulsed Magnetic Fields International-presentation Invited

    H. Nojiri, T. Kihara

    International Union of Crystallography 2017 (IUCr2017)　2017/08/28

  15. Recent Progress in High Magnetic Field Research at HFLSM, Sendai International-presentation Invited

    H. Nojiri

    2016 Hefei Conference on Novel Phenomena in High Magnetic Fields　2016/10/31

  16. Low Energy Excitations in Spherical Kagome Lattice Mo72V30 and Related Materials International-presentation Invited

    H. Nojiri

    5th International Conference on Superconductivity and Magnetism (ICSM2016)　2016/04/24

  17. Development of Repetitive Pulsed Magnet with High Magnetic Field for Neutron Scattering Experiment in J-PARC

    第7回MLFシンポジウム　2016/03/15

    More details Close

    M.Watanabe, H.Nojiri

  18. 強磁場中性子回折と強磁場X線回折-強相関系と超伝導体への最近の応用 Invited

    野尻浩之

    Workshop: CROSSroads of Users and J-PARC 第15回「物質の構造と機能」　2015/09/07

  19. High Magnetic Field X-ray Experiments with Synchrotron Radiation and Free Electron Laser Sources International-presentation

    H. Nojiri, S. Matsuzawa, H. Yasumura, Y. Narumi, C-C. Kao, D. Zhu, J-S. Lee

    The 11th International Conference "Research in High Magnetic Fields" (RHMF2015)　2015/07/01

  20. Exchange Coupling in Heterometallic Magnetic Molecules International-presentation Invited

    H. Nojiri

    Zentrum für interdisziplinäre Forschung(ZIF) WORKSHOP “Functionalized Molecule-Based Magnetic Materials”　2014/11/26

  21. Development of Magnetization and XMCD Detection ESR International-presentation

    H. Nojiri, S. Matsuzawa

    Joint Conference of Asia-Pacific EPR/ESR Symposium(APES2014)・International EPR (ESR) Society Symposium(IES)・the 53th The Society of Electron Spin Science and Technology (SEST2014)　2014/11/12

  22. Present and Future of Neutron Experiments in Pulsed Magnetic Fields and Complementary Use with Steady Fields International-presentation Invited

    H. Nojiri

    Helmholtz-Zentrum Berlin Workshop "Neutron Scattering in Magnetic Fields above 15 Tesla”　2014/10/30

  23. Fast Spin Reversal at Level Crossing and EPR Line Width International-presentation Invited

    H. Nojiri, S. Matsuzawa

    Fujihara Seminar: Real-time Dynamics of Physical Phenomena and Manipulation by External Fields (2014RTDYN)　2014/09/24

  24. Neutron Diffractions in Pulsed High Magnetic Field International-presentation Invited

    H. Nojiri

    International Union of Crystallography (IUCr2014)　2014/08/08

  25. Multi-property Control in Charge Transfer Spin Crossover System International-presentation

    H. Nojiri

    The 14th International Conference on Molecule-Based Magnets (ICMM2014)　2014/07/05

  26. High Magnetic Field Neutron Diffraction-Present Status and Future Development International-presentation

    H. Nojiri

    HANARO-TOHOKU workshop Materials Science Advanced by Neutron Scattering　2014/06/24

  27. THz Electron Spin Resonance in Pulsed Magnets International-presentation Invited

    H. Nojiri

    The 3rd Russia-Japan-USA Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies RJUS TeraTech-2014　2014/06/20

  28. Application of Pulsed Magnetic Fields for X-ray Spectroscopies and Neutron Diffraction International-presentation

    H. Nojiri

    SIMES Seminar　2014/02/14

  29. High Magnetic Field Research Laboratory Network in Japan International-presentation

    H. Nojiri

    3rd French-Japanese High Field Research Collaboration Workshop　2013/11/12

  30. Neutron Diffractions in Pulsed High Magnetic Fields and their Applications to Frustrated Antiferromagnets International-presentation

    H. Nojiri

    International Conference on Neutron Scattering 2013 (ICNS2013)　2013/07/08

  31. High Magnetic Field Neutron Diffraction in Frustrated Antiferromagnets International-presentation

    H. Nojiri

    JAEA Synchrotron Radiation Research Symposium "Magnetism in Quantum Beam Science"　2013/03/11

  32. パルス超強磁場下の中性子回折

    野尻浩之

    Workshop: CROSSroads of Users and J-PARC 第5回「J-PARCの単結晶回折計による構造物性研究」　2013/02/25

  33. Exploring New Magnetic Field Induced States by Combining Neutron Diffraction and XMCD International-presentation

    H. Nojiri

    Workshop on Synchrotron and Neutron Applications of High Magnetic Fields(SYNEMAG 2012)　2012/10/17

  34. Application of THz ESR on Molecular Magnets International-presentation

    H. Nojiri

    8th Asia-Pacific EPR/ESR Symposium (APES 2012)　2012/10/11

  35. 強磁場中性子回折で見るフラストレーション磁性体の強磁場相

    野尻浩之

    第4回J-PARC/MLFシンポジウム・茨城県ビームライン平成23年度成果報告会　2012/10/10

  36. XMCD nd Recent Progress in X‐Ray Spectroscopies under Pulsed High Magnetic Fields International-presentation

    H. Nojiri

    11th International Conference on Synchrotron Radiation Instrumentation (SRI2012)　2012/07/09

  37. Neutron Diffraction and X-ray Spectroscopies in Pulsed High Magnetic Fields International-presentation

    H. Nojiri

    The 10th International Conference on Research in High Magnetic Fields(RHMF2012)　2012/07/03

  38. Neutron Diffraction in Pulsed High Magnetic Fields International-presentation

    H. Nojiri

    Advanced Seminar on "Perspectives for Neutron Science in Novel & Extreme Conditions"　2012/05/27

  39. Spin Crossover Transition with Multifunctional Materials International-presentation

    62nd Fujihara Seminar “Frontier and Perspectives in Molecule-Based Quantum Magnets”　2012/05/07

  40. High Magnetic Field Neutron Diffraction Experiment on Multiferroic International-presentation

    H. Nojiri, T. Morioka, S. Yoshii, T. Kimura

    The 2nd International Symposium on Advanced Synthesis and Processing Technology for Materials（ASPT2011）　2011/12/01

  41. Spin Crossover Transition in Charge Transfer Complex International-presentation

    H. Nojiri, K. Tazoe, H. Oshio, N. Hoshino

    The 50th Annual Meeting of the Society of Electron Spin Science and Technology(SEST2011)　2011/11/16

  42. Spin State Transition International-presentation

    ICC-IMR Workshop on Development of Functionalized Molecule-based Magnetic Materials　2011/09/12

  43. Pulsed High Magnetic Fields for X-ray and Neutron Diffraction Experiments International-presentation

    WHMFC The International Workshop on "Frontier Science in Pulsed High Magnetic Fields"　2011/04/20

  44. Spin Freezing in Keplerate Clusters International-presentation

    The Third International Workshop on Dynamics and Manipulation of Quantum Systems (DMQS2010)　2011/02/14

  45. Pulsed High Magnetic Field Laue Diffraction Experiment at Spallation Neutron Source International-presentation

    H. Nojiri, S. Yoshii, M. Matsuda, T. Morioka, L. Santodonato, G. Granroth, K. Ross, B. Gaulin

    Physical Phenomena at High Magnetic Fields - VII　2010/12/04

  46. Role of Spin Chirality in Triangula Based Molecular Magnets International-presentation

    The 12th International Conference on Molecule-Based Magnets　2010/10/08

  47. Triangular Based Molecular Magnets, Spin State Transition and Magnetic Coupling International-presentation

    Leverhulme Meeting　2010/07/19

  48. X-ray and Neutron Experiments in High Magnetic Fields International-presentation

    9th International Conference on Research in High Magnetic Fields　2009/07/22

  49. Magnetism of RE-3d complex International-presentation

    Leverhulme Funded Workshop on Molecular Magnetism　2009/07/13

  50. Application of pulsed magnetic fields for neutron and x-ray experiments International-presentation

    International Workshop on “Frontier Science in Pulsed High Magnetic Field”　2009/03/30

  51. Study of molecular magnetism by using time-dependent magnetic fields International-presentation

    International Workshop on “Frontier Science in Pulsed High Magnetic Field”　2009/03/30

  52. Neutron diffraction in high magnetic fields, past, present and future International-presentation

    4th JAEA Synchrotron Radiation Research Symposium : X-Ray and High Magnetic Field　2009/03/05

  53. Pulsed Magnetic Field for Neutron Diffraction at J-PARC International-presentation

    4th JAEA Synchrotron Radiation Research Symposium : X-Ray and High Magnetic Field　2009/03/05

  54. RE-3d molecular magnet and spin tube International-presentation

    Leverhuime Funded Workshop on Molecular Magnetism　2008/07/22

  55. High magnetic field experiments for frustrated spin systems International-presentation

    NSFC- JSPS Joint Mini- Workshop on Novel Quantum Phenomena in Strongly Correlated Electronic Systems　2007/07/25

  56. X-ray Spectroscopy and Diffraction Experiments by using Mini-coils; Applications to Valence State Trancition and Frustrated Magnet International-presentation

    H. Nojiri, M. Matsuda

    Work shop on Syncrotron Applications of High Magnetic Field　2006/11/16

  57. Application of MMW/THz ESR for High Magnetic Feild Spin Sciences- Physics, Chemistry and Material Science International-presentation

    IRMMW-THz2006　2006/09/18

  58. Magnetization reversal in 0 and 1D spin systems in fast sweeping magnetic fields International-presentation

    the 362nd Wilhelm und Else-Heraeus Seminar entitled "Advances and prospects in Molecular Magnetism"　2005/11/13

  59. High Field ESR on Quantum Spin Systems International-presentation

    RHMF 2000 ｜ 6th International Symposium on Research in High Magnetic Fields　2000/07/30

  60. Submillimeter-wave ESR Study on Quantum Spin Systems International-presentation

    International Workshop on Magnetic Excitations in Strongly Correlated Electrons　1999/08/19

Show all Show first 5

Research Projects 39

  1. Study of Magnetic Field Induced Electronic Phase Transitions by X-ray scattering with Pulsed Fields and XFELs

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2019/04 - 2023/03

  2. High Magnetic Field Order and Magnetic Correlation of URu2Si2-Verifing Phase Diagram and Symmetry

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Tohoku University

    2018/04/01 - 2020/03/31

  3. Study of magnetic dynamics on surfaces and interfaces by high frequency and atomic layer sensitive ESR

    NOJIRI HIROYUKI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2017/06/30 - 2019/03/31

    More details Close

    Studies on X-ray magnetic circular dichroism(XMCD) detection type ESR has been performed to realize an atomic layer sensitive ESR. Such technique is expected to contribute to the understandings of functionalities of surface and interface of magnetic compounds. We have succeeded in the feasibility experiment by combining W-band frequency and sub-50 K cryostat. It enables us to examine paramagnetic compounds for the comparable range of Zeeman and thermal energies creating sizable XMCD signal. Various methods of signal modulations for the higher sensitivity enhancement have been examined and compared. A possibility of time dependent measurement has been also studies. It was turned out that 100 shots accumulation is required to perform such XMCD-ESR when it is combined with a X-ray free electron laser creating sub-ps X-ray pulses.

  4. Study on Spin-charge-lattice Correlations by High Magnetic Field X-ray Diffraction and Spectroscopy with X-ray Free Electron Laser

    NOJIRI HIROYUKI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2016/04/01 - 2019/03/31

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    The high magnetic field x-ray diffraction and x-ray emission spectroscopy have been achieved by combining a pulsed magnetic field and a x-ray free electron laser. We have elucidated the phase diagram of magnetic field induced charge density wave in a Y-based high Tc superconductor and its relation to the quantum critical point. We have also determined the relation between the domain size and the transition temperature as well as the relation between the magnetization and the lattice constant in hysteresis area of the spin-crossover transition of Mn(taa). We have also investigate the charge density waves in low-dimensional conductor and the applications for fundamental physics. These studies open the new opportunities of using very high magnetic field for X-ray free electron laser related sciences.

  5. Study of Quantum Magnetic Phases by High Magnetic Field Neutron Scattering and XMCD

    NOJIRI Hiroyuki, NARUMI Yasuo, KUWAHARA Keitaro, NAKAMURA Tetsuya, NAKAJIMA KenjiI, OHYAMA Kenji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)

    Category: Grant-in-Aid for Scientific Research (S)

    Institution: Tohoku University

    2011/04/01 - 2016/03/31

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    We have developed neutron and X-ray techniques in pulsed magnetic fields and have succeeded in combined them with ultra-low reduced temperature. The direct observation of order parameters and the electronic states by neutron and X-ray enables us to solve important long-time remaining problems such as the high field phases in U-intermetallics, valence state transition in Eu-ternary compounds, spin nematic phase in quantum spin chain and re-entrant transitions in multiferroics. We have also opened new paradigm such as X-ray free electron laser experiments in pulsed high magnetic fields, which uncovered the new three dimensional charge density wave in high-Tc superconductors. Our concept is now spreading over other areas such as spectroscopy, THz-ESR and particle physics. The present research has made our leading status in the area of high magnetic field quantum beam science more solid and has contributed much for the development in this and related areas.

  6. 超強磁場によるスピン多重度制御と量子巨大応答

    野尻 浩之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 新学術領域研究(研究領域提案型)

    Institution: 東北大学

    2012/04/01 - 2014/03/31

    More details Close

    本研究の目的は、配位化学的手法で作製される錯体分子スピン系において、スピン多重度の制御による量子相制御と磁気共鳴状態下での外場応答ならびに光誘起スピンクロスオーバー現象を利用した量子巨大応答を実現することである。本年度は、スピン多重度制御の基礎となるFeおよびCo錯体の電荷移動に関して、XASならびにXMCDを用いた価数と磁気モーメントの決定を行い、Fe-Co１次元鎖では、電荷移動に関与する結合状態を明らかにするとともに、Fe42においては、巨大スピン基底状態がどのようなFeの電子・磁気状態から生じているかを明らかにした。これらの研究により、Feのスピン転移やクロスオーバーを利用した相制御法の一部、異なる秩序状態間の転移を実現する事が出来たが、その一方で、量子揺らぎの大きな無秩序状態と秩序状態間の遷移には、擬一次元系における鎖間相互作用のプログラムが必要なことが明らかになった。巨大応答の発現に関しては、系のコヒーレントな応答の実現が鍵を握る。今回、Fe-Co１次元電子移動型スピンクロスオーバー錯体で1 kHz程度の異常な低周波の誘電分散を見いだし、これが、電子移動が１次元鎖の中でマクロな領域でコヒーレントに起こっているとの解釈を与え、キラル等の結晶構造の対称性の低下との関連に関して提案を行った。マクロな領域の実証に関しては、電荷状態を区別した共鳴散乱等の手法による検証が待たれる。この他、へテロスピン系において、古典スピンと量子スピンを結合して、スイッチ可能な量子ユニットを形成する研究を行い、通常の磁気共鳴では禁制な特異なスピン反転が対称性の制御により引き起こせる事を実証した。この機構を用いると化学シフトを用いなくても、へテロスピンユニット内の古典スピンの状態制御（書き込み）により、量子スピンの反転周波数を制御出来る。

  7. スピンクロスオーバーを示すナノ磁性体のミクロ多自由度ハミルトニアンに基づく理解

    野尻 浩之, BAKER MichaelLloyd, BAKER MICHAELLLOYD

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2011 - 2013

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    本研究で行った主な課題は4つに分類出来る。1つ目の研究は、Ni (II)のトライマー系のクラスターに関する研究である。高周波ESR装置を活用し、スピンハミルトニアンを定量的に決定し、これらの系の構造と磁性の相関を系統的に明らかにする事に成功した。2つ目の研究は、1次元の電荷移動型スピンクロスオーバー錯体に関する研究である。SPring8において、強磁場領域の軟X線吸収分光を用いて、CoFe1次元錯体の磁性を元素選択的に同定し、CoとFeの磁気状態の同定とFe-CN-Co結合における電荷移動状態を決定した。3つ目の研究として、Fe42クラスターに関する九州大学の佐藤グループとの共同研究があげられる。Fe42は、42個の鉄イオンサイトをもつ混合原子価の多面体形錯体であるが、磁化とESRによりこの物質が強磁性相互作用を有しており、その基底状態のスピンはS=45とこれまで見つかった中で最大のスピンを有する系であることが確定した。引き続いて、XASとXMCDを用いた研究を行い、電荷移動がほぼ100%おこっていること、さらにFe^<2+>状態における軌道磁気モーメントの大きさを定量的に決定することにも成功した。これらの結果は、混合原子価と電荷移動による強磁性相互作用により巨大スピンが実現し、クラスターの形状の制御により、クラスター全体の異方性を制御出来ることを示している。さらに、4つ目としてラジカルとランタノイドからなるヘテロスピン系の磁気相互作用に関して、高分解能中性子非弾性散乱によりエネルギー準位を決定し、波数依存性の解析から、基底状態と励起状態の混成が強いことを明らかにした。これは、基底状態の混成により新しい対称性をもつハミルトニアンに移行することを示している。

  8. Single Molecular ESR with Graphen-Based Devices

    NOJIRI Hiroyuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2011 - 2012

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    Electron Spin Resonance methods have been developed by using the interaction between the 3d electrons and p-electrons for targeting the single molecular ESR device by using a graphen. Device structures, magento-transport and molecular depositions have been investigated, which lead to the new ESR technique on nano-molecules.

  9. 超高速超強磁場による量子巨大応答と階層機能創出

    野尻 浩之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 新学術領域研究(研究領域提案型)

    Institution: 東北大学

    2010 - 2011

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    本研究の目的は、錯体分子系において、コヒーレントスピン操作と磁場・電場に対する量子巨大応答を達成することである。 コヒーレントスピン操作としては、超高速掃引磁場下の電子-核スピンエンタングルメントによる量子トンネル現象の実現に続いて、パルスEPRによるラビ振動の観測に成功した。これまでのラビ振動の観測は、殆どが凍結溶液などの稀釈系における実験であったが、今回Siのナノポーラス系に埋め込んだ3角クラスターという固体系において始めてラビ振動の観測に成功したことで、スケーラブルな系の構築への方向性を示した意義は大きい。さらに、量子スピン操作を容易にする系の候補として、異方性の大きな希土類と等方的なラジカルスピンを結合したIsing-Heisenbergクラスターを提案し、スピン量子数が保存しないESR遷移によるラジカルスピンの反転と、交換バイアスによるエネルギー準位の制御が可能なことを示した。これらの系はスピンによる記憶と反転操作の両者が容易に制御出来る系となることが期待できる。 外部刺激に応答するスピン系として、エネルギー縮退の大きな3角クラスターに注目し、Feの3角クラスターの磁性の理解、鋸歯リング磁性体のエネルギー準位の評価などを行い、3角クラスターの量子状態の理解に貢献した。 新学術領域の融合性を生かした研究として、Fe-Co1次元錯体の電荷移動によるスピンクロスオーバー転移における誘電異常、強電場によるブレークダウン現象などを明らかにすると共に、Fe-Coの1:2型のスピンクロスオーバー転移において光誘起状態のESR測定により、光励起により磁気秩序相間の転移が起こることを示した。また、Re錯体において、価数揺動によるNMRの緩和時間の特異な温度変化を見出した。さらに、超小型コイルを用いて従来の100倍大きな磁気力が実現できる事を示した。

  10. 透明パルス磁石による全方位強磁場中性子散乱

    野尻 浩之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 挑戦的萌芽研究

    Institution: 東北大学

    2009 - 2010

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    磁場誘起磁気相転移研究において、磁気構造を直接決定できる中性子回折は重要なツールである。我々は、パルス強磁場と組み合わせることで50Tまでの中性子回折実験を目指した装置開発を行ってきた。また、これと相補的な装置として、小型のコンデンサバンクを用いた30-35Tの中性子回折装置も開発している。これまでは主に、強い磁場が出せて安定しているソレノイドコイルによる横磁場装置の開発を行ってきたが、広い散乱角での測定を行うために、今回新たに2つの方式のコイルを設計し、試験を行った。 1つめは、スプリットペア型コイルである。ギャップの大きさは5mmとし、ポータブル電源で駆動できる小型コイルとした。試料の冷却は冷凍機の2次ステージによりコイルを1次ステージにより試料を冷却するが、試料温度は10K止まりである。冷却効率を改善するために、縦型の分割式クライオスタットを設計した。このクライオスタットはオレンジクライオスタットにより試料を冷やす事でより低温を達成が可能である。 もう1つの方式は、薄肉ソレノイド型コイルである。この場合中性子はコイルを透過することになり、強度が落ちるものの、構造が単純であるという長所がある。コイルの強度と吸収を評価したところ、60%の損失で25T程度の磁場が発生可能で有ることがわかった。線材としては超伝導線とSUS-Cu線から選択が可能である。また、より強い磁場の発生のためにAl203と重水を用いたバックアップ方式を検討し、コストは高くなるものの30T以上の磁場を発生可能であることを確認した。ソレノイド型の場合、コイルからの散乱が全てバックグラウンドとなるために、その効果は無視できないが、検出器のコリメーションの強化により、改善が可能である。

  11. Quantum Magnetism of Triangular-Ring Based Nano Magnetic Clusters

    NOJIRI Hiroyrki, OSHIMA Yugo, KUMAGAI Ken-ichi, IMANAKA Yasutaka

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2008 - 2010

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    We have investigated varieties of material consists of triangle units with spin chirality, including spin tube and spin polyhedron. The excitation by the spin chirality sector is found in the spin tube and the change of the ground state from spin singlet to the spin freezing state is found in the spin polyhedron. We have found the role of nuclear spin in quantum tunneling through the parity conservation. A new hetero-spin systems and nuclear spin free quantum magnets are also investigated.

  12. X-ray Spectroscopy and Neutron Scattering Studies on CorrelatedLocalized-Itinerant Electron Systems.

    NOJIRI Hiroyuki, INAMI Toshiya, MATSUDA Yasuhiro, KAKURAI Kazuhisa, MATSUDA Masaaki, OHOYAMA Kenji, NARUMI Yasuo, NAKAJIMA Kenji, HIROTA Kazuma, MAEKAWA Fujio, HASEGAWA Shoichi, OIKAWA Kenichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Priority Areas

    Institution: Tohoku University

    2005 - 2009

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    We have succeeded in X-ray-diffraction,-absorption spectroscopy,-magnetic circular dichroism,-resonant diffraction and neutron diffraction in 40-50 T. It enables us to investigate electronic-magnetic state of a correlated localized-itinerant electron system in ultra-strong magnetic field. It leads the opening of new research area: high magnetic field quantum beam science. The priority of Japan initiative in this area has been established among world quantum beam research facilities.

  13. Management of High Magnetic Field Spin Science in 100 T

    NOJIRI Hiroyuki, ZHENG Gou-qing, KOBAYASHI Norio, KINDO Koichi, TAKAMASU Tadashi, KIDO Giyuu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Priority Areas

    Institution: Tohoku University

    2005 - 2009

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    The project have achieved the world leading progress in three main areas ; (1)spin-control of electronic state, (2)investigation of mechanisms and functions of various magnetic field induced states and (3)spin-probe of electronic state. The development of advanced and precise instrumentations in pulsed high magnetic fields has opened new developing research areas and lead to the establishment of the high magnetic field spin science in 100 T.

  14. 超強磁場X線による機能性金属間化合物の磁場制御

    野尻 浩之, OUYANG Zhongwen

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2006 - 2008

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    金属間化合物において磁性と格子の結合による新しい物質としての可能性が近年着目されている。例えば、エネルギー変換に有用な磁気熱量物質などにおける巨大磁場応答とそのダイナミックスは、応用上重要であるばかりでなく、磁性と構造の相関の観点からは、優れた基礎科学の課題でもある。また、長年にわたり探求されている価数揺動の問題も、近年の強磁場X線分光の進展により、電子状態に踏み込んだ理解が可能になりつつある。このような背景を踏まえて、Zhongwen博士はX線と強磁場を駆使して、希土類を含む金属管化合物の磁気-構造相関に関わる研究を行った。 以下にその主な内容を記す。1.Fe3Ptにおけるマルテンサイトバリアントの回転の直接観測,2.巨大磁気熱量物質Gd5Ge4の格子変形と熱量効果および相転移の可逆性の相関,3.Pr0.5Ca0.5Mn0.97Ga0.0303における特異な磁化過程,4.Pr0.6Ca0.4Mn03の金属-絶縁体転移のXASによる金属-絶縁体転移において吸収端スペクトルの顕著な磁場変化を見出すことに成功,5.価数揺動を示すEuNi2(Si0.18Ge0.82)2とEuNi2P2において、磁場中の電子状態をx線で調べる手法を確立した。XASにおいては、価数転移における価数の磁場変化を直接決定し、XMCDにおいては、軌道ごとの磁化を測定することで、磁気分極の磁場依存性と遍歴-局在バンド間の相関の強さを評価した。

  15. 核スピンによる量子トンネル制御

    野尻 浩之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2006 - 2007

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    本研究の目的は最も単純な量子キュービットであるS=1/2の単一スピンを用いて、量子トンネル効果を磁場制御し、電子スピンの量子トンネリングにおける核スピンの役割を明らかにする事にある。本年度は、核スピンの偏極をラジオ波で制御した場合のトンネル確率の変化の検証、トンネルギャップが小さな高スピンMn化合物における非断熱遷移の検証、S=1/2基底状態をもつV15スピンクラスターのトンネルギャップの直接測定と、核スピンとの相関を研究した。Mn7核からなる車輪型分子磁石においては、磁場掃引速度を10^4T/s領域にすると磁化の反転率が低下する現象が見いだされた。これは非断熱遷移領域に達したことを示唆する。その一方で、量子振動等は観測されず、デコヒーレンスが強いことが判明した。Mnイオンは比較的大きな核スピンをもつことから、核スピンのゆらぎによる低周波のノイズがこれに寄与していると考えられる。一方ガラスにドープしたCuイオンに関しては、高速掃引領域で反転率が75%程度に低下することが見いだされた。この確率は核スピンを含めたパリティが保存すると考える時に期待される値である。その一方で、中間の掃引速度では反転率が1に近くなり、掃引速度と反転率の関係に非単調性が見いだされたが、この原因は不明である。一方、V15においては、ゼロ磁場のトンネルギャップの大きさがこれまで判っていなかったが、今回超低周波ESRによりその大きさを30 mK程度と決定した。この大きさは核スピンの寄与が無視できないことを示す。

  16. Quantum Phase Transition of Triangular Spin Tube

    NOJIRI Hiroyuki, OSHIMA Yugo, FURUKAWA Yuji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2006 - 2007

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    The purpose of the research is to investigate the magnetic excitation and the quantum phase transition of a triangular spin nano-tube:[CuCl_2tachH]_3Cl]Cl_2:the first quantum spin tube found by us. In the specific heat at ultra-low temperature, we found complex excitations made of two components. The first one is a gapped excitation, which can be fitted by an Ising chain model. The second one is a gap-less excitation with a small density of state. The result indicates that two types of excitations coexist in a spin tube. The origin of the gapped excitation is the excitation of spin chirality holding the Ising nature. This may be associated with the ordering of spin chirality at low temperature. The second excitation is caused by a spin wave like excitation, however, the fraction of this is only 25 % or less of that of a spin chain. It shows that the ground state of the present spin tube is gapless with considerable renormalization of energy. To investigate the phase diagram of spin tube, we made a D-substituted sample and succeeded in modulating the exchange coupling in the chain direction. It is found that the exchange coupling in increased by 7 % by D-substitution. The origin of the modulation is the suppression of proton tunneling in hydrogen bonds connecting neighboring triangles in chain direction. In NMR, no magnetic anomaly is found down to very low temperature and the good separation between the tubes are confirmed. The present investigation indicates the variety of magnetic properties in a quantum spin tube, which is caused by the existence of two degrees of freedom: spin and spin chirality.

  17. Study of quantum magnetism in nano spin polyhedrons

    NOJIRI Hiroyuki, MATSUDA Yasuhiro, OSHIMA Yugo, KWANG-YONG Choi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2004 - 2005

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    Spin polyhedrons are antiferromagnetic spin clusters of high symmetry without disorders. Variety of magnetic networks is possible because a translational symmetry in not needed in such clusters. We have investigated two types of clusters Mo72Fe30 and Fe9. The former cluster is so called corner-sharing network of triangles and latter is the edge-sharing network. The spin frustration is strong and the energy state is highly degenerated. The Mo72Fe30 shows a dip of derivative magnetization at the 1/3 of full magnetization and the origin of dip has been interpreted by the "order by disorder" mechanism. At low temperature, the system shows a broad anomaly in specific heat and in ESR line width. This phenomenon is interpreted as "quasi long range order" caused by the saturation of intra-cluster magnetic correlation. As for the size effect, the smearing of magnetization step is confirmed in Mo72Fe30, where the energy separation among the discrete levels is smaller than the mixing term such as staggered fields and anti-symmetric exchange interaction. On the other hand, clear steps are found in Fe9 and the reduction of the step magnetization is attributed to the asymmetric mixing caused by the spin chirality. The dynamics of the triangle spin ring, which is an important component of spin polyhedrons, has been investigated. A clear adiabatic magnetization and half-step magnetization phenomenon is found. The comparison of magnetization process is made with different systems such as two-nuclear complex and rare earth based cluster. The importance of spin chirality is examined in various system such as spin tube.

  18. THz Spectroscopy and Electron Spin Resonance in High Magnetic Fields Competitive

    2004/04 -

  19. High Magnetic Field X-ray Spectroscopy, X-ray scattering and Neutron Diffraction Competitive

    2004/04 -

  20. High Magnetic Field Spin Science Competitive

    2004/04 -

  21. Quantum Magnetism and Spin Manipulation in Nano Quantum Spin Systems Competitive

    2004/04 -

  22. 100テスラ領域における強磁場スピン科学の構築

    野尻 浩之, 金道 浩一, 小林 典男, 太田 仁, 杉山 清寛, 木戸 義勇

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 基盤研究(C)

    Category: 基盤研究(C)

    Institution: 東北大学

    2004 - 2004

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    本調査研究では、100テスラ領域の強磁場スピン科学を課題に、日本の強磁場科学およびこれを基盤とした物性研究の将来戦略のための議論を行い、研究報告として取り纏めた。将来戦略の構築のために、少人数からなるミニ研究会を開催し、強磁場研究の専門家と関連する分野の第一線の研究者が十分な議論を行いながら、研究課題、研究戦略、諸外国での動向、実現のための方途などを詳細に検討した。具体的には、(1)X線散乱-中性子散乱実験、(2)NMR、ラマン散乱、テラヘルツESR、(3)ナノ量子磁性とスピントロニクス、(4)強相関と超伝導。ミクロプローブの4つの研究会を行った。 また100テスラスピン科学の基盤となる100テスラ磁場の生成に関して、関係者による突っ込んだ議論を行い、フライホイール発電機とコンデンサを組み合わせることで100テスラの非破壊磁場を発生することが現時点で非常に有望であることを明らかにした。 さらに、広い視野から強磁場研究の現状に関して交流および意見交換を行う研究会を平成17年1月に物性研究所で開催し、調査研究班員の枠を大きく越えた100名以上の参加で、日本における強磁場研究の現状を総括すると共に、100T領域の強磁場研究を推進するための方策、科学的課題の検討と選定、行うべき計測手法の戦略的検討、将来構想実現のための国内の研究組織の形成、国際競争のための戦略と国際協力のあり方などに関して多角的な議論を行った。 今回の調査研究の結果、100テスラ領域におけるスピン科学を日本が世界に先駆けて推進することが基盤的物質科学における我が国の優位性を確保する上で重要であり、また日本の強磁場関連研究資産と人的資産が、このような展開を行う十分なポテンシャルを有していることが明らかになった。

  23. テーブルトップ50テスラ級パルス超強磁場の実現

    野尻 浩之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    2003 - 2004

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    本研究の目的は、超小型の超強磁場発生装置を製作し、加速器等を用いた先端的な粒子源、光子源を有する施設等において簡便、柔軟、迅速に超強磁場環境を利用する道を開くことにある。 昨年度に引き続き今年度は電源の小型化に取り組み、重量を従来の1/3にする事に成功した。サイズは、一般的な実験机の下に格納出来る大きさであり、研究の目的としていたテーブルトップの超強磁場環境を実現することに成功した。このテーブルトップ磁場を用いてX線や磁気光分光の実験を行い、十分に実用的な実験を行えることを確認した。この成果は、大きな反響を呼び、ヨーロッパの放射光施設の研究者が見学に訪れるなど世界的に高い評価を受けている。 ポータブルパルス磁場の応用として、RI管理区域等での物質評価への応用を検討した。近年、超ウラン元素で様々な新しい物性が見つけだされているが、これらの試料を通常の実験室に持ち出して測定するのは様々な制約がある。試料を持ち出す代わりにポータブルパルス磁場を持ち込んで、現場で高度の磁気特性評価を行えれば、研究効率が格段に向上する。試料のリモート操作や耐放射線性の高い制御系などの基礎設計を行いその実現が可能であることを示した。 同様の応用として、中性子散乱への応用に関しても検討した。ポータブルパルス磁場は磁場発生空間が小さいが、中性子集光デバイスと組み合わせることで実用水準の実験が出来ることが評価できた。 このようにポータブルパルス磁場は強磁場環境を様々な研究現場に浸透させることにより研究の質的な向上を図ることに非常に有用であることが明らかになった。

  24. Investigations of new field induced quantum phenomena in magnetic systems by high field ESR and neutron diffraction measurements

    OHTA Hitoshi, KABURAGI Makoto, OKUBO Susumu, NOJIRI Hiroyuki, KIKUCHI Hikomitsu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Priority Areas

    Institution: Kobe University

    2001 - 2004

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    New model substances for diamond chain, delta chain and zig-zag chain systems are found, and following new field induced quantum phenomena have been investigated. 1) The model substance of diamond chain Cu_3(CO_3)_2(OH)_2 has been found for the first time. The magnetic susceptibility result shows two peaks and it suggests that two kinds of short range order exist in the system. Low temperature magnetization measurements show 1/3 magnetization plateau, which has been observed in the diamond chain model substance for the first time. The exchange interactions of Cu_3(CO_3)_2(OH)_2 are determined by analyzing the magnetization curve by the theory. High field ESR measurements of shows the dynamics of the system and the direct transition which changes at the magnetization plateau. 2) The breather mode up to the saturation magnetization, the decrease of the field induce gap under the high field and the cross-over effect of the excited mode above the saturation field have been observed in the one dimensional antiferromagnet Cu-benzoate. The breather mode is also observed in the one dimensional mixed crystal system BaCu_2(Si_<1-x>Gex)_2O_7. 3) Two-triplet bound state is investigated in details for two dimensional dimer system SrCu_2(BO_3)_2. 4) The magnetization plateau has been observed in the giant magnetic molecule for the first time, and the frustration effect in the system is discussed. 5) High field ESR system under high pressure has been developed. The suppression of the spin gap under pressure at 4.2 K has been observed directly in the dimer system KCuCl_3 by observing the direct transition using our new high field ESR system under pressure up to 10 kbar. 6) The fine energy structure of the finite Haldane chain system has been investigated by high field ESR. Owing to the high spectral resolution by high fields and high frequencies, observed ESR signals can be separated into the contributions of the finite chains with various chain length. The chain length dependence of the interaction has been obtained experimentally for the first time, and the correlation length in the real system is discussed.

  25. Development of high precision THz-ESR system by using repealing pulsed magnetic fields

    NOJIRI Hiroyuki, MATSUDA Yasuhiro, MINO Michinobu, YAMAZAKI Hitoshi, KOYAMA Keiichi, SAKON Takuo

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: OKAYAMA UNIVERSITY

    2001 - 2003

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    A high precision terahertz ESR system has been developed by using a repeating pulsed magnetic field. The system is capable of generating pulsed magnetic fields up to 30 T every two seconds. The drastic improvement of signal to noise ratio is achieved by the signal averaging technique. The ratio becomes at least 50 times higher than that of the conventional ESR spectrometer by using a single shot type pulse field. The maximum frequency up to 3 THz can be used and it is extremely higher than that of the commercial W-band ESR spectrometer. Moreover, the efficiency defined by the possible number of scans par unit time is much larger than that of ESR spectrometer using superconducting magnets. The typical resolution of the present system is 10 gauss in simple hardware averaging method. The resolution ca be improved to 1 gauss by using a software averaging by suing a peak picking process. Test experiments have been made on a ladder compound and a micro single crystal of nano-magnetic cluster. Even a very weak forbidden transition can be observed by present system. The present result leads to the application of a repeating pulsed magnetic field for various types of spectroscopy such as Raman scattering or X-ray spectroscopy for solid state.

  26. ESR-μSR分光による量子臨界点近傍における多自由度励起相の研究

    野尻 浩之, 髭本 亘, 門野 良典, 有本 収, 松田 康弘, 左近 拓男, 小山 佳一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    2000 - 2003

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    本研究では、ESRとμSR分光を相補的に用いて、強相関系における新しい基底状態、励起状態の研究を行った。成果の1つとして重要なものは、異方的超伝導体の浸入長の決定であり、Y(Ni_<1-x>Pt_x)_2B_2C、MgB2、PrOs_4Sb_<12>に関して超伝導の対称性を決定するのに有用な情報を得た。さらに、PrOs_4Sb_<12>に関しては超伝導状態の形成に伴ってできる微弱な磁場を検知することに成功し、この物質で時間反転対称性が破れるような超伝導状態が生じていることを明らかにした。 μSR分光は、キャリアドープによって生じる微弱な反強磁性転移を調べるのに威力を発揮する。この特性を利用して、Pr_<0.89>LaCe_<0.11>CuO_<4+> La_<2-x>Sr_xCuO_4などにおける微弱で乱れた磁気秩序の観測やボルテックス状態の観測などに成功し、超伝導状態の理解を深めるのに貢献した。さらに、フラストレーショシの強いLiV_2O_4において特異なスピンゆらぎを見出した。 ESRを用いて、磁場によりトリップレットの金属 非金属転移が引き起こされる2次元ダイマー系において、多粒子の作る束縛状態を初めて見出し、その対称性や結合状態を詳細に明らかにした。 強磁場X線測定を用いた、Mn酸化物の磁場誘起非金属 金属転移における格子歪みの実時間観測に成功し、磁場の変化率に応じた準安定状態が現れること、これらの準安定状態は格子の特徴的な変形を伴っていることを示した。さらに、非金属 金属転移がスピン自由度のみが変化する可逆な部分と、格子変形を伴う非可逆な部分に分けられることを見出した。

  27. ESR Study of a novel elementary excitation : Breather in quantum spin chains

    NOJIRI Hiroyuki, KOYAMA Keiichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    2000 - 2001

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    A non-linear excitation : breather has been studied in a quantum antiferromagnetic chain CuBenzoate by means of ESR. The anisotropy and the field dependence of the field induced gap has been investigated by a high resolution ESR. In low field region, the exponent of the gap on the magnetic field found to be very close to theoretical value of 2/3. A dynamical crossover between the gapped soliton-breather regime and the gapless spinon regime has been found as the anomaly of ESR line shape and line width. By using a Voight configuration, the energy of breather mode has been determined very precisely without a correction of Zeeman term. In the high field regime, a decrease of the exponent is found. A coupling constant of a sign-Gordon model has been experimentally obtained from the accurate field dependence of the breather mass. High field zero field muon spin rotation experiments have been performed down to 16 mK and no evidence of a long range order is found. It shows the extremely good one-dimensionality of Cubenzoate. Several different types of higher order breather excitations have also found.

  28. サブミリ波ESRによる磁性半導体超構造の電子状態の研究

    野尻 浩之, 本河 光博, 小山 佳一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究(A)

    Institution: 東北大学

    1999 - 1999

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    磁性半導体超構造を用いたスピンエレクトロニクス実現のために、III-V 族半導体である GaAs に遷移金属をドープした時に生じる強磁性発現の機構やその電子状態の理解することは重要である。本年は、前年から継続してサブミリ波ESRを用いて強磁性状態での GaMnAs を研究した。さらに本年度は、ESR にくわえて遠赤外分光実験も行った。分光実験では、赤外領域に価電子帯から Mn のアクセプターレベルへの遷移と思われる吸収と、遠赤外領域に低波数にひろがったブロードな吸収を見いだした。後者の強度は、強磁性転移温度以下で大きく増大することから、強磁性秩序によってホッピング伝導が増加していると考えられる。このことは、キャリア誘起強磁性の証拠であるが、同時に Mn 濃度が数%のところでは、ホッピング伝導が見られたことから、電子状態は完全に金属的にはなっておらず、半導体との中間的な様相を示すことも明らかとなった。さらにII-VI属磁性半導体の CdMnTe において少量の Fe をドープしたときに現れる強磁性の発現機構に関してESR で調べた。その結果、強磁性は鉄のスピンの周りで Mn スピンが強磁性的に揃えられることにより起きることを示唆する結果を得た。この場合 Fe の異方性が強い事が、スピンを揃えることを促進していると考えられ、さらにII-VI属磁性半導体においては2種類の磁性イオンを同時にドープすることによって、強磁性的な配列を作りうる可能性があることを示した。

  29. ESRによるLa214系の不純物効果の研究

    野尻 浩之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1998 - 1999

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    La214系を始めとする高温超伝導を示す酸化物ならびにその関連物質にホールを不純物ドープしたときに現れるストライプの起源およびストライプ相での磁気励起に関してサブミリ波ESRにより調べた。まずストイキオメトリのLa_2NiO_4において世界で初めて反強磁性共鳴(AFMR)を観測することに成功した。低温4.2Kにおけるc面内でのAFMRの角度依存性は正方晶から期待される90度パターンを示さず、面内のスピンは結晶軸から15度程度ずれていることがわかった。これは、交換相互作用の異方的成分が大きいことを示している。過剰酸素ドープしたLa_2NiO_4においてはホストのスピン波が乱れによって不鮮明になる一方で、異方性ギャップが母体スピン波の約20%と異常に小さい低エネルギーの磁気励起が波数ゼロの励起として現れることを見いだした。このような低エネルギーの励起の出現はスピンギャップを示すCuGeO_3であらわれる低エネルギーの反強磁性スピン波モードと類似している。ドープした酸素の乱れをクエンチやアニールによって制御すると、この低エネルギー励起は大きな影響を受け、乱れが大きくなると消失する。このことから、この新しい励起はホールが母体結晶中に規則的に配列した時に出来るスピン波状のモードであることが確認した。またこの低エネルギーの励起の異方性は、結晶のc面内で4回対称の異方性を示し、その方向はホールの作るストライプの方向と一致している。このモードが母体の反強磁性の転移点の約50%程度より低温で現れることから、ホールが完全に局在化する温度はかなり低く、低温までゆらぎが残っていると考えられる。さらに関連物質であるBi_2CuO_4の反強磁性共鳴の観測にも成功した。

  30. Development of 30 T Repeating Pulsed Field

    NOJIRI Hiroyuki, ARAI Masatoshi, MOTOKAWA Mitsuhiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: Tohoku University

    1998 - 1999

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    A repeating pulsed field system has been developed for the neutron diffraction experiments in high magnetic fields. Magnetic fields as high as 30 T can be generated by using the present system. Magnetic fields above 25 T have not been obtained by way of a superconducting magnet. Therefore, the present field intensity is the highest field for neutron diffraction in the world. As the magnet, 3-layer Bitter type magnet is used. The use of the 3-layer structure improves the electric and mechanical contacts between the adjacent layers and the loge life-time of magnet is achieved. As the first test of the neutron diffraction experiments above 25 T, we have investigated the metamagnetic phase transition in a triangular lattice anti-ferromagnet CuFeO2. The change of the magnetic structure from the incommensurate to the commensurate structure was found around 20 T. The neutron diffraction experiments in Dy Cu was also made and the nature of metamagentic transition was investigated. The present results have established the feasibility of the neutron diffraction experiments in very high fields above 20 T by using a repeating pulsed magnetic field system.

  31. サブミリ波ESRによる磁性半導体超構造の電子状態の研究

    野尻 浩之, 光藤 誠太郎, 本河 光博, 小山 佳一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究(A)

    Institution: 東北大学

    1998 - 1998

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    III-V族半導体であるGaAsにMnをドープした時に生じる強磁性発現の機構やその電子状態の理解は磁性半導体超構造を用いたスピンエレクトロニクス実現のために必要不可欠な要素である。我々はサブミリ波ESRを用いて強磁性状態でのGaMnAsのg値が2.0であることを決定し、Mn^<2+>が主になっていることを示した。通常の低磁場のマイクロ波ESR測定では反磁場の見積もりがg値の精密な決定の障害となるが、高分解能のサブミリ波ESRを用いることにより精度良く決定出来た。さらに線形がローレンツ型になること、線幅が外部磁場に依存しないことからMnイオンのランダムな分布にも関わらず、静的な交換磁場の分布は小さく、個々のMnイオンは強く運動による先鋭化を受けていることが分かった。このことはキャリアの運動が強磁性の交換相互作用を担っているという議論を支持する結果である。さらに非絶縁体強磁性の常磁性ESR強度の経験的スケーリング則、すなわち磁気モーメント全体の内で伝導を担う部分の割合が大きいほど、強度がT_c以上で早く減少することを見いだし、この経験則をGaMnAsに適用した。その結果Mn酸化物よりも局在モーメントの割合が大きい結果を得た、これはMn^<2+>が主になっていることを支持する。さらに遠赤外分光を低波数の3cm^<-1>まで行い、系の伝導は主にホッピング伝導に依って担われており、そのホッピングは強磁性秩序によって大きな影響を受けることを見いだした。

  32. サブミリ波ESRを用いた磁性半導体超構造の研究

    野尻 浩之, 本河 光博, 光藤 誠太郎

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 重点領域研究

    Institution: 東北大学

    1997 - 1997

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    サブミリ波ESRによりIII-VならびにII-VI族希薄磁性半導体の電子状態、磁気的状態を研究した。III-V族のGaMnAsに関して強磁性転移温度以下で強磁性共鳴信号を観測し、飽和磁化を見積もった。これよりドープしたMn^<2+>の約半分が磁化に寄与していると評価した。今回観測した信号はg=2であることから、Mn^<2+>の信号と考えられる。Mn^<3+>の信号は観測されなかったが、線幅が広くなっている可能性もある。ESRからはMn^<2+>の存在は確認されたが、Mn^<3+>の状態に関してはさらに研究が必要である。次にII-VI族のCd(Mn)TeのESRを系統的に行い、磁場中でスピングラス状態から乱れた反強磁性状態へのクロスオーバーを見いだした。このクロスオーバーの磁場から、35%Mnをドープした系でのMn間の平均の分子場は約7T程度と考えられる。さらに、線幅と線形の解析から内部場の分布等を見積もった。線形は単純なガウス分布ではなく、中心磁場の異なる複数のガウス分布の和で表されることから、クラスター的なスピングラスになっていると考えられる。このことはII-VI族では超交換相互作用が支配的であるということと対応している。GaMnAsに関して放射光を用いて遠赤外領域までの分光測定を行い、キャリアのプラズマ振動数に対応すると思われる反射率の立ち上がりを20cm^<-1>以下の低波数側で見つけた。この反射率の立ち上がりはGaAsのバンドギャップ内に出来た新しい状態の存在を示唆していると考えられる。

  33. ヘリウム3温度における低次元磁性体のESR

    野尻 浩之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1996 - 1996

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    低次元磁性体の研究においてESRは大変有用な手段であるが、ヘリウム3温度での測定はこれまでほとんどなかった。本研究では、THzのサブミリ波領域ならびに40Tの強磁場をカバーし、かつヘリウム3温度で使用可能な装置を製作し研究を行った。具体的にはスピンパイエルス物質CuGeO_3にSiを04-2%ドープした系について初めて反強磁性共鳴を測定し、格子系の乱れによりスピンパイエルス転移が抑制されて、新しく形成される3次元の磁気秩序をESRにより研究した。特に低濃度の試料では磁気転移点が1K以下であり、今回開発した装置がその研究に必要不可欠であった。ESRの研究により、低温で出現する磁気秩序は系全体がコヒーレンスを持った新しい相であり、不純物の濃度分布により出来た相分離ではないことが結論された。また磁場温度相図において、従来見つけられていなかった新しい相を発見した。この事より、低温の新しい相を理解するためには、強磁場中で現れる非整合相のように単純な周期性をもった磁気秩序状態ではなく、より高次の秩序変数を考えなければならない事を示唆した。また、不純物をいれないCuGeO_3の強磁場中の磁気相についてサブミリ波ESR測定を行い、磁気相に固有の新しいモードを強磁場まで測定した。このモードの線幅の温度変化の測定より、これは鎖間方向にも強く結合した3次元的モードであり、磁気相のモデルとしてはスピンソリトン描像よりも非整合相の描像のほうが適していることを明らかにした。

  34. くり返しパルス強磁場によるアクチナイド化合物のμSR及び中性子回折

    本河 光博, 野尻 浩之, 古坂 道弘, 遠藤 康夫, 西山 樟生, 永嶺 謙忠

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 重点領域研究

    Institution: 神戸大学

    1990 - 1990

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    交付申請書に述べた計画に従って、我々の開発した繰り返しパルス強磁場と高エネルギ-物理学研究所の加速器からくるミュオン及び中性子を用い、世界で初めて16Tという強磁場中で、μSRと中性子回折の実験を、強磁場中で複雑な磁気構造を持つPrCo_2Si_2という物質について行った。その結果得られた成果は次の通りである 1、μSR実験 この物質はヘリウム温度で、1.2T以下では反強磁性であるが、1.2Tと3.8Tの間および3.8Tと12.2Tの間で二つの複雑な長周期構造をとることが知られている。それぞれの構造に於て、あるいは転移磁場に於て、ミュオンの緩和からスピン系のダイナミックスを知ることができた。反強磁性状態ではスピンのゆらぎはなく、従って緩和は観測されないが、長周期構造に於いては、c軸方向に14周期あるいは4.5周期毎にあるアンチフェ-ズドメインがソリトンのように激しく運動していることなど判明した。複雑な磁気構造の変化はこの不安定なソリトンの運動と深い関係があると思われるがまだ明確ではない。 2、中性子回折実験 強磁場中でおこる複雑な磁気構造を中性子回折によって正確に決めることに成功した。その結果磁化測定によって、1.2Tと3.8Tの間および3.8Tと12.2Tの間で予想されていた、プロパゲ-ションベクトルが13/14および2/9の長周期構造が明確となった。試料が電気伝導体であるため渦電流による温度上昇が問題となったが、その温度をブラッグ反射の強度から正確に決めることにより、最低温度ではないが相図としては完成させることが出来た。またこの実験を通じて、世界初の強磁場中性子回折実験の可能性が現実となり、今後大きく発展するきっかけを作った。

  35. くり返しパルス強磁場を用いたアクチナイド化合物のMSR及び中性子回折の研究

    本河 光博, 野尻 浩之, 古坂 道弘, 遠藤 康夫, 西山 樟生, 永嶺 謙忠

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 重点領域研究

    Institution: 神戸大学

    1989 - 1989

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    MSRの実験に関し、平成元年度6月までは、主として検出器の最適位置の探索に費やされた。ミュオンビームを磁場によって絞ることが予想どうりゆかず、結局コリメータによってビームを細く絞ったため強度がかなり減少し、そのため測定にかなり時間がかかることが判明した。また測定の手始めとして、既に低磁場でのデータがあり、ネール温度や緩和時間が丁度いい領域にあるMuOの綻緩和の測定を試みた。190Kでデータが得られ10.5テスラでの緩和時間が低磁場でのそれとほとんど同じ3μ秒であった。6月から12月まではKEKの加速器が停止していたので測定はおこなわれなかったが、その間にクライオスタットの制作および、6月までテストを行っていたμポートからもっと偏極度も高く強度も強いπポートへの移動を行った。これにより約10分の1の時間で測定がおこなえるものと予想された。平成2年1月から再びマシンタイムが与えられ、まずMnOの常磁性緩和の測定を行って比較したところμポートで行ったときよりもはるかにいいS/Nでデータを得ることができた。そしてメタ磁性を示すPr_2Co_2Si_2の強磁場中磁気相転移にともなう縦緩和の磁場変化を調べようとしている。この物質は12テスラで相転移をおこすが10.5テスラで緩和を測定することができた。現在磁場を変化させて縦緩和時間の変化を測定している。このような磁気相転移に関連した緩和についての情報は全くはじめてであり大きな成果と思われる。これと平行に2月から新しく中性子回折による強磁場中磁気構造の決定の実験が始められている。まず現在その特異な磁化過程と伊達モデルによって話題となっているPrCo_2Si_2について行う準備が進められている。今年度はこのための装置の開発とクライオスタットの制作、架台の設置等の作業が行われた。

  36. サブミリ波ESRによるガラスの局在フォノン「フラクトン」の研究

    本河 光博, 利根川 孝, 野尻 浩之, 太田 仁

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 一般研究(A)

    Institution: 神戸大学

    1988 - 1989

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    本研究は申請の段階に於て3年計画であったが、採択された折2年間のみ補助金の交付が認められた。初年度は主として実験設備の整備、試料の製作等がなされ、本年度に本格的な測定が行われる予定であったが諸事情のため遅れ、やはり申請の段階に述べたように3年計画で研究が遂行されるようことが進んでいる。 ガラスのような非晶質な物質の物性を普遍的に理解するためフラクタルという概念が取入れられ、非晶質系でのフォノンについて、フラクトンと名ずけられる局在モ-ドが見つけられた。本研究では、十分低温でこの局在フォノンのエネルギ-に対応するサブミリ波領域でのESRを用い、そのスピン格子緩和時間の測定からフォノンの状態密度を直接求めフラクトンの存在を明確にすることを目的とする。試料として典型的なガラスとして知られるB_2O_3、GeO_2、SiO_2をとりあげる。これらを白金るつぼで1000度以上で溶融して、g-値の異方性の小さいV Ti MnCu等の鉄族元素の酸化物を0.1%程度に薄く混入した試料を作った。それら不純物イオンのESRを観測する。この実験ではESRの共鳴磁場は10テスラ-以上になるためパルス強磁場を用いて実験を行う。これに必要な設備は揃った。またその他必要な装置の開発もなされ、磁場変調およびロッキンアンプを用いた高感度サブミリ波ESR装置も完成した。しかし初年度ωが320ー400GHz帯の波長域を発振するカルシノトロンを購入し、本年度は200ー250GHz帯のものを購入したが、納期がかかったこと及びメ-カ-であるトムソン社による必要電圧などの仕様の変更がなされ、当初購入した電源ではそのままでは追従できなくなり、若干の改造を行ったりしたため時間がかかり本格的な実験までにいたらなかった。年度末の現在、装置は順調に働いており、当初申請時に計画した3年目には研究が遂行される。

  37. 超強磁場下のミュオン物理

    本河 光博, 野尻 浩之, 西山 樟生, 永嶺 謙忠, 伊達 宗行

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定研究

    Institution: 神戸大学

    1988 - 1988

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    62年度中に20テスラの磁場を2万回(約11時間)繰り返し発生させることに成功した。63年度は6月にμSRの実験を行うべく強磁場発生装置を実験室に持込みテストを行ったが検出器の位置調整に予想以上に時間がかかり、物理的測定までに至らなかった。即ちミュオンから崩壊してでてくるポジトロンが強磁場によって曲げられるため最適の検出位置を探さなければならないが、通常なら50ミリ秒毎にくるビームを検出しながら検出器の位置を動かし最適位置を見つけるところが、繰り返し強磁場を使う場合は2秒に一度しかビームを検出できないのでこの作業に時間がかかったわけである。しかし2月のマシンタイムで再挑戦しμSRの実験に成功した。一方サンプルを液体ヘリウム温度に冷却するためのデワーを設計したが、その段階においてシングルショットのパルス磁場ならば問題のなかったステンレススチールが、繰り返しパルス磁場の場合は蓄熱のために温度が上がりデワーの材料として使用できないことが判明した。そのため絶縁体で熱伝導度のいいサファイヤの筒を熱シールドに使ったデワーを制作しヘリウム温度の実験にも成功した。また今年度はもっと強度の高い材料を使って30テスラ用のマグネットの設計と制作を平行して行った。 この研究の中核をなす繰り返しパルス強磁場発生の技術研究はまだ世界のどこでもなされておらず、本研究課題がはじめてである。これをミュオンの実験に応用し、新しい研究分野を開くのも全く初めてである。20テスラの磁場の2万回繰り返しの成功は本年7月ベルギーのリューベンで開かれた第2回強磁場磁気国際シンポジウムで発表され高く評価された。また繰り返しパルス磁場とパルス的にくるミュオンビームとの組合せという発想は、パルス中性子な加速器を用いた自由電子レーザーの研究家にも関心を呼び大きな反響があった。

  38. 超強磁場下のミュオン物理

    本河 光博, 野尻 浩之, 西山 樟生, 永嶺 謙忠, 伊達 宗行

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定研究

    Institution: 神戸大学

    1987 - 1987

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    本研究内容は3年にわたって行うように計画が分割されており本年度は2年目であり昨年度の研究を活用しながら具体的に装置の開発を行いミュオン実験の可能な態勢にこぎつけた. 本年度は昨年度のコンデンサーバンクの購入にひきつづき電源を購入しくりかしパルス強磁場の発生テストを行った. マグネットは昨年度の設計に基づき厚さ1mmの銅板を内径30mmφ外径150mmφにうちぬきそれをFRPの絶縁板と交互に重ねて製作された. 銅板の枚数は100枚でコイルのインダクタンスは約80μヘンリーになり, 丁度設計時の値である1m秒の磁場発生時間を得ることができた. このコイルにはたてに水を流すための穴が貫通しており水冷によりコイルの発熱がおさえられるようになっている. この電源とコイルにより予定通り20テスラの磁場を1パルス毎に1m秒の間発生しそれを2秒毎にくり返しながら10時間以上2万回のくり返し発生に成功した. ここで使われた銅板の材質は特に強度の高いものではなかったため20テスラ2万回が寿命と考えられる. しかしもっと強度の高い材料を使うことにより30テスラの磁場を得られるようにできると考えられるが次年度にもちこされる. 2万回のくり返し可能により実際にμSRの実験と組み合わせることが可能となりそのための準備が行われた. 実際の実験は次年度にもちこされた. 研究内容としてはまずガラスの中のフォノンの局在モードを探索するためのガラスのミュオニウムの緩和の実験が計画されている.

  39. 超強磁場下のミュオン物理

    本河 光博, 野尻 浩之, 西山 樟生, 永嶺 謙忠, 伊達 宗行

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定研究

    Institution: 神戸大学

    1986 - 1986

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    本研究内容は3年にわたって行うように計画が分割されており本年度は最初の年であるため主として実験を行うための装置の開発設計テストに努力がはらわれた。 強磁場発生の方法には大きくわけて水冷式定常磁場とパルス磁場の二つがある。前者の方法で20T〜30Tの磁場を得ることは可能であるが装置自体が非常に大きなものとなり我々の考えている予算で建設することは不可能である。パルス磁場はコンデンサーに蓄えられたエネルギーを瞬間的にコイルに放電して大電流を流し強磁場を出す方法で、水冷式に比べ経済的でありまた出し得る最高磁場も高い。本研究ではミユオンビームがパルス的に来ることを考慮し、そのパルスに同期して発生するパルス磁場を用いることにする。しかし今までに開発され利用されてきた単発のパルス磁場とな異り、周期的に飛来するビームパルスと同じくくり返しを必要とするので定常磁場のように冷却についても考察しなければならない。しかし実際に設計を行ってみるとコイルの冷却よりも電源の方に問題があることがわかった。即ち限られた予算で電源をつくるために電源側の内部損失による発熱をできるだけへらす必要があり、そのためにくり返しの周波数を低くしなければならない。したがって50ミリ秒間隔でくるビームパルスすべてに同期することはできなく2秒に一度のパルス磁場発生となる。コインの内径は約20mmで 約10【cm^3】の空間に30Tの磁場を発生させ、デユワーを使うことによりヘリウム温度での実験も可能になるようにする。 本年はこの電源に必要なコンデンサーバンクを購入したが充電器等は次年度の予定である。したがって現有の小型のバンクを用いて単発でコイルの発燃テスト等を行った。

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Social Activities 9

  1. 映画 磁気物理学監修

    沈黙のパレード

    2020/05 - 2022/06

  2. 鉄原子42個からなるカゴ状磁性分子の合成に成功－巨大分子磁石の世界記録を樹立－

    2015/01/09 -

  3. 卓上型パルス磁場発生装置開発, 1ピコ秒の時間分解能を達成 東北大とライス大の共同研究グループ

    2014/02/07 -

  4. 磁場30テスラで分光測定、卓上型パルス発生装置 東北大など開発

    2014/01/10 -

  5. 磁場誘起量子相の磁気構造、独自の中性子回折装置で東北大, 茨城大と仏の研究所が共同

    2013/06/14 -

  6. 磁界制御による新しいスピン素子の機能実証

    2012/07/13 -

  7. 超強磁場中性子回折法によりフラストレート磁性体の普遍的なスピン-格子相互作用を発見

    2010/01/25 -

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    磁気物理学研究部門は独自に開発した30テスラ超強磁場中性子回折装置を用いてラウエランジュバン研究所で実験を行い、クロム（Cr）スピネルというフラストレート反磁性体が磁場中で共通の磁気構造を持つことを初めて明らかにしたが、これに関して日刊工業新聞で報道された。

  8. 世界最高磁場におけるX線磁気円二色性分光を実現

    2009/08/26 -

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    磁気物理学研究部門は、東京大学物性研究所、日本原子力研究開発機構、高輝度光科学研究、九州大学理学研究院と共同で、元素ごとの磁性を調べるX線磁気円二色性（XMCD)分光法と呼ばれる手法において、これまでの世界記録を抜本的に塗り替え、地磁気の約100万倍の40テスラという超強磁場下での実験を実現し、これに関して日刊工業新聞で報道された。

  9. 電子価数を世界最強磁場下でのＸ線分光により直接決定

    2007/03/30 -

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    最近、磁気物理学研究部門と日本原子力研究開発機構をはじめとしたグループは、独自の超小型パルスマグネット技術を用いて、世界最高の50テスラを超える強磁場中で様々な放射光Ｘ線実験を可能にする技術を開発してきたが、これに関して科学新聞で報道された。

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Academic Activities 3

  1. Asia-Pacific Conference on Condensed Matter Physics 2022

    2022/11/21 - 2022/11/23

    Activity type: Academic society, research group, etc.

  2. Summit of Materials Science 2022

    2022/03/02 - 2022/03/03

    Activity type: Competition, symposium, etc.

  3. 1St Asia-Pacific Conference on Condensed Matter Physics 2021

    2021/12/01 - 2021/12/03

    Activity type: Competition, symposium, etc.

Other 12

  1. MTA による強磁場装置のオーストリア科学技術大学への提供

  2. MTA による強磁場装置のBessyIIへの提供

  3. MTA による強磁場装置のRice大学への提供

  4. Providing strong magnetic field equipment by MTA to PSI

  5. Providing strong magnetic field equipment by MTA to Cornell University

  6. MTA Kyoto Univ. MTA2018

  7. MTA SLAC MTA2017

  8. MTA Rice MTA2014-0010

  9. MTA ManUK MTA2013-0001

  10. Providing strong magnetic field equipment by MTA to BessyII

  11. Providing strong magnetic field equipment by MTA to Mainz University

  12. Providing strong magnetic field equipment by MTA to Rice University

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