Details of the Researcher

PHOTO

Yuichi Yamasaki
Section
International Center for Synchrotron Radiation Innovation Smart
Job title
Professor
Degree

Research History 11

  • 2024/11 - Present
    National Institute for Materials Science

  • 2017/06 - Present
    理化学研究所　創発物性科学研究センター　客員主管研究員

  • 2024/04 - 2024/10
    National Institute for Materials Science

  • 2021/04 - 2024/03
    National Institute for Materials Science

  • 2020/04 - 2022/03
    High Energy Accelerator Research Organization　Institute of Materials Structure Science

  • 2017/10 - 2021/03
    科学技術振興機構　さきがけ研究員

  • 2017/04 - 2021/03
    物質・材料研究機構　統合型材料開発・情報基盤部門　主任研究員

  • 2014/04 - 2017/03
    理化学研究所　創発物性科学研究センター　ユニットリーダー

  • 2014/04 - 2017/03
    The University of Tokyo

  • 2009/10 - 2014/03
    High Energy Accelerator Research Organization

  • 2007/04 - 2009/09
    日本学術振興会 特別研究員(DC1)

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Education 2

  • The University of Tokyo　The Graduate School of Engineering　Department of Applied Physics

    2005/04 - 2009/09

  • The University of Tokyo　The Faculty of Engineering　Department of Applied Physics

    - 2005/03

Committee Memberships 2

  • 放射光学会誌編集委員

    2023/10 - Present

  • 放射光学会誌編集委員

    2011/09 - 2013/09

Professional Memberships 2

  • THE JAPANESE SOCIETY FOR SYNCHROTRON RADIATION RESEARCH

  • THE PHYSICAL SOCIETY OF JAPAN

Research Interests 6

  • 計測インフォマテイクス

  • 磁性体

  • Multiferroics

  • Skyrmion

  • Synchrotron radiation

  • X-ray diffraction

Research Areas 1

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

Papers 137

  1. Discovery of Structurally Diverse Zintl Polyphosphides (Eu,Sr)Px by Computationally Assisted High-Pressure Synthesis

    Alex Hiro Mayo, Yuki Hayashi, Yasuhito Kobayashi, Hajime Sagayama, Yuichi Yamasaki, Hidefumi Takahashi, Shintaro Ishiwata

    Chemistry of Materials　2026/10/28

    DOI： 10.1021/acs.chemmater.6c01923 　

  2. Evaluation of Topological Charge Distribution of Structured Soft X-ray Beam

    Yuta Ishii, Yuichi Yamasaki

    Journal of the Physical Society of Japan　2026/06/15

    DOI： 10.7566/JPSJ.95.063002 　

  3. Enhanced X-ray structural analysis using total variation denoising of X-ray diffraction images

    Kouhei Ichiyanagi, Toshiyuki Sasaki, Yuichi Yokoyama, Yuichi Yamasaki

    Acta Crystallographica Section A Foundations and Advances　2026/01/01

    DOI： 10.1107/S2053273325009672 　

  4. Development of soft X-ray microscope with a four-pole magnet

    Yuta Ishii, Yusuke Kozuka, Shiro Kawachi, Toshimitsu Ito, Yusuke Wakabayashi, Hironori Nakao, Taka-Hisa Arima, Yuichi Yamasaki

    Science and Technology of Advanced Materials: Methods　2025/12/31

    DOI： 10.1080/27660400.2025.2586300 　

  5. High-throughput mapping of magnetic properties via the on-the-fly XMCD spectroscopy in a combinatorial Fe-Co-Ni film

    Yuichi Yamasaki, Norimasa Sasabe, Yuta Ishii, Yu Sekiguchi, Akiho Sumiyoshiya, Yusuke Tanimoto, Yoshinori Kotani, Tetsuya Nakamura, Hikaru Nomura

    Science and Technology of Advanced Materials: Methods　2025/12/31

    DOI： 10.1080/27660400.2025.2544528 　

  6. Sum rules for X-ray circular and linear dichroism based on complete magnetic multipole basis

    Y. Yamasaki, Y. Ishii, N. Sasabe

    Science and Technology of Advanced Materials　2025/12/31

    DOI： 10.1080/14686996.2025.2513217 　

  7. Spin fluctuation induced anomalous Hall effect in the distorted kagome antiferromagnet DyAgGe

    Tomomi Furuhashi, Keita Nagasawa, Yuichi Yamasaki, Hironori Nakao, Yusuke Kozuka, Yoshihiro Tsujimoto, Kazunari Yamaura, Jun Fujioka

    Physical Review B　2025/12/04

    DOI： 10.1103/q5ll-klzh 　

  8. X-ray magnetic circular dichroism originating from the anisotropic magnetic dipole operator in collinear altermagnets under trigonal crystal field

    Norimasa Sasabe, Yuta Ishii, Yuichi Yamasaki

    Physical Review B　2025/12/01

    DOI： 10.1103/hchg-7bq9 　

  9. A Rutile-Based Homologous Series Na(PtO2)2n+1 Discovered by Computationally Assisted High-Pressure Synthesis. International-journal

    Yasuhito Kobayashi, Hidefumi Takahashi, Shunsuke Kitou, Akitoshi Nakano, Hajime Sagayama, Yuichi Yamasaki, Shintaro Ishiwata

    Inorganic chemistry　2025/08/09

    DOI： 10.1021/acs.inorgchem.5c02074 　

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    Layered transition metal oxides typified by the Ruddlesden-Popper phase have been extensively studied for their applications in high-temperature superconductivity, catalysis, and battery technologies. Despite the remarkable structural diversity and catalytic functionality of platinum oxides, the exploration of layered polymorphs has remained significantly constrained, mainly due to the high inertness of platinum. Here, we discover a new homologous series of layered ternary oxides, Na(PtO2)2n+1, by a combination of highly oxidizing high-pressure methods and density functional theory (DFT) calculations. This series features unprecedented layered structural motifs, rutile-based PtO6 octahedra, and one-dimensional PtO4 square-planar columns, which enable systematic control of dimensionality. Furthermore, we demonstrate a computationally assisted identification of isomeric and putative members of this homologous series, as confirmed by controlled synthesis and quantitative analysis of diffuse scattering data. This approach provides an effective platform for the exhaustive exploration of metastable transition metal oxides with rich structural variations.

  10. Altermagnetism in epitaxial NiCo2O4 thin films via higher-order magnetic anisotropy

    Hiroki Koizumi, Yuichi Yamasaki

    Journal of Physics D: Applied Physics　58　(25)　253002-253002　2025/06/17

    Publisher: IOP Publishing

    DOI： 10.1088/1361-6463/addfe2 　

    ISSN： 0022-3727

    eISSN： 1361-6463

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    Abstract NiCo2O4 is a ferrimagnetic oxide with an inverse spinel structure that has garnered significant research interest due to its unique properties, including relatively high electrical conductivity, mixed-valence cations, and a Néel temperature exceeding room temperature. Furthermore, epitaxial NiCo2O4 thin films provide an exciting platform for tuning material properties and uncovering novel phenomena that are not observed in bulk single crystals. In this review, we highlight recent advancements in epitaxial NiCo2O4 thin films, focusing on: (i) the tunability of anti-site defects through controlled fabrication conditions, (ii) the emergence of easy-cone magnetic anisotropy (ECMA) induced by these anti-site defects, (iii) the realization of a nontrivial spin structure characterized by magnetic toroidal quadrupole order, driven by the ECMA, (iv) novel magneto-transport phenomena arising from this nontrivial spin structure, and (v) the correlation between this nontrivial spin structure and the concept of altermagnetism.

  11. Exploration of Metastable A-Site-Ordered Perovskites (Ca,Ba)FeO3-δ by Computationally Guided Multistep Synthesis. International-journal

    Masaho Onose, Hidefumi Takahashi, Hajime Sagayama, Yuichi Yamasaki, Shintaro Ishiwata

    Journal of the American Chemical Society　147　(10)　8260-8266　2025/03/12

    DOI： 10.1021/jacs.4c15392 　

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    Perovskite-type iron oxides with Fe4+ ions have attracted a great deal of attention for their versatile helimagnetic phases. While the introduction of a layered A-site ordered structure to AFeO3 with Fe4+ ions potentially leads to novel helimagnetic phases, the synthetic pathway spanning a high-pressure range is apparently difficult to elucidate. Here, we explored new A-site ordered perovskite-type iron oxides (Ca,Ba)FeO3-δ with Fe4+ ions with the support of first-principles calculations evaluating thermodynamic stability at selected pressures and chemical compositions. Among the six types of putative A-site ordered perovskites with and without oxygen vacancy, only two types of oxygen-deficient perovskites CaBaFe2O6-δ and Ca(Ba0.9Ca0.1)2Fe3O9-δ (δ ∼ 1) were successfully obtained by high-pressure synthesis, consistent with the DFT-based convex-hull calculations. Considering the evaluated stability of the putative perovskites at selected pressures, we adopted low-temperature topotactic oxidation using ozone at ambient pressure and obtained the oxidized perovskites CaBaFe2O6-δ (δ ∼ 0.4) and Ca(Ba0.9Ca0.1)2Fe3O9-δ (δ ∼ 0.6), potentially showing novel helimagnetic phases. This study demonstrates that computational visualization of multistep synthetic pathways involving high pressure can accelerate the search for new metastable perovskites with rich magnetic phases.

  12. Mass enhancement and metal-nonmetal transition driven by d-f hybridization in perovskite La1−xPrxCuO3

    H. Takahashi, M. Ito, J. Fujioka, M. Ochi, S. Sakai, R. Arita, H. Sagayama, Y. Yamasaki, S. Ishiwata

    Physical Review B　2025/02/28

    DOI： 10.1103/PhysRevB.111.085153 　

  13. Zinc Stabilized Cation Ordered Chalcopyrite Thin Film for Enhanced Thermoelectric Power Generation Near Room Temperature

    Pang, H., Bourg{\`e}s, C., Tsujii, N., Rajveer, J., Kawamoto, N., Ichihara, F., Baba, T., Baba, T., Sato, N., Yamasaki, Y., Mori, T.

    ACS Materials Letters　2025

    DOI： 10.1021/acsmaterialslett.4c01898 　

    ISSN： 2639-4979

  14. Rocksalt-type heavy rare earth monoxides TbO, DyO, and ErO exhibiting metallic electronic states and ferromagnetism

    Satoshi Sasaki, Daichi Oka, Daisuke Shiga, Ryunosuke Takahashi, Suguru Nakata, Koichi Harata, Yuichi Yamasaki, Miho Kitamura, Hironori Nakao, Hiroki Wadati, Hiroshi Kumigashira, Tomoteru Fukumura

    Dalton Transactions　2025

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d4dt03214d 　

    ISSN： 1477-9226

    eISSN： 1477-9234

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    Rocksalt-type heavy rare earth monoxides REOs (RE = Tb, Dy, Er) were synthesized as single phase epitaxial thin films for the first time. They exhibited metallic electronic states and a much higher TC than the corresponding rare earth nitrides.

  15. Microscopic evaluation of spin and orbital moment in ferromagnetic resonance

    Yuta Ishii, Yuichi Yamasaki, Yusuke Kozuka, Jana Lustikova, Yoichi Nii, Yoshinori Onose, Yuichi Yokoyama, Masaichiro Mizumaki, Jun-ichi Adachi, Hironori Nakao, Taka-hisa Arima, Yusuke Wakabayashi

    Scientific Reports　14　(1)　2024/07/05

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41598-024-66139-1 　

    eISSN： 2045-2322

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    Abstract Time-resolved X-ray magnetic circular dichroism under the effects of ferromagnetic resonance (FMR), known as X-ray ferromagnetic resonance (XFMR) measurements, enables direct detection of precession dynamics of magnetic moment. Here we demonstrated XFMR measurements and Bayesian analyses as a quantitative probe for the precession of spin and orbital magnetic moments under the FMR effect. Magnetization precessions in two different Pt/Ni-Fe thin film samples were directly detected. Furthermore, the ratio of dynamical spin and orbital magnetic moments was evaluated quantitatively by Bayesian analyses for XFMR energy spectra around the Ni $$L_{2,3}$$ absorption edges. Our study paves the way for a microscopic investigation of the contribution of the orbital magnetic moment to magnetization dynamics.

  16. Lattice-commensurate skyrmion texture in a centrosymmetric breathing kagome magnet

    Hirschberger, M., Szigeti, B.G., Hemmida, M., Hirschmann, M.M., Esser, S., Ohsumi, H., Tanaka, Y., Spitz, L., Gao, S., Kolincio, K.K., Sagayama, H., Nakao, H., Yamasaki, Y., Forr{\'o}, L., Krug von Nidda, H.-A., Kezsmarki, I., Arima, T.-H., Tokura, Y.

    npj Quantum Materials　9　(1)　2024

    DOI： 10.1038/s41535-024-00654-2 　

    ISSN： 2397-4648

  17. Quadrupole anomalous Hall effect in magnetically induced electron nematic state

    Hiroki Koizumi, Yuichi Yamasaki, Hideto Yanagihara

    Nature Communications　14　(1)　2023/12/08

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41467-023-43543-1 　

    eISSN： 2041-1723

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    Abstract Berry phases in both momentum and real space cause transverse motion in itinerant electrons, manifesting various off-diagonal transport effect such anomalous and topological Hall effects. Although these Hall effects are isotropic within the plane perpendicular to the fictitious magnetic field, here, we report the manifestation of the anisotropic linear anomalous Hall effect (AHE) in the spinel oxide NiCo2O4 epitaxial film. The unconventional Hall effect indicates a quadrupole dependence on the in-plane current direction being added to the uniform AHE. Moreover, its sign can be manipulated just by magnetic-field cooling. The anisotropic effect is attributed to an electron nematic state originating from a deformed electronic state owing to an extended magnetic toroidal quadrupole and ferrimagnetic order.

  18. Ferroic Order for Anisotropic Magnetic Dipole Term in Collinear Antiferromagnets of (t2g)4 System

    Norimasa Sasabe, Masaichiro Mizumaki, Takayuki Uozumi, Yuichi Yamasaki

    Physical Review Letters　131　(21)　2023/11/22

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevlett.131.216501 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  19. Development of Multi-scale Soft X-ray Diffraction Microscope for Observing Spin Textures

    Yuta Ishii, Yusuke Kozuka, Yuichi Yamasaki, Hironori Nakao

    Proceedings of the 29th International Conference on Low Temperature Physics (LT29)　2023/05/22

    Publisher: Journal of the Physical Society of Japan

    DOI： 10.7566/jpscp.38.011190 　

  20. Field-tunable Weyl points and large anomalous Hall effect in the degenerate magnetic semiconductor EuMg2 Bi2 Peer-reviewed

    Kondo, M., Ochi, M., Kurihara, R., Miyake, A., Yamasaki, Y., Tokunaga, M., Nakao, H., Kuroki, K., Kida, T., Hagiwara, M., Murakawa, H., Hanasaki, N., Sakai, H.

    Physical Review B　107　(12)　L121112　2023/03

    DOI： 10.1103/PhysRevB.107.L121112 　

    ISSN： 2469-9969 2469-9950

  21. Possible helimagnetic order in Co4+-containing perovskites Sr1- xCaxCoO3

    Takahashi, H., Onose, M., Kobayashi, Y., Osaka, T., Maeda, S., Miyake, A., Tokunaga, M., Sagayama, H., Yamasaki, Y., Ishiwata, S.

    APL Materials　10　(11)　111116-111116　2022/11/01

    Publisher: AIP Publishing

    DOI： 10.1063/5.0101473 　

    ISSN： 2166-532X

    eISSN： 2166-532X

  22. Time-resolved resonant soft X-ray scattering combined with MHz synchrotron X-ray and laser pulses at the Photon Factory

    Ryo Fukaya, Jun-ichi Adachi, Hironori Nakao, Yuichi Yamasaki, Chihiro Tabata, Shunsuke Nozawa, Kouhei Ichiyanagi, Yuta Ishii, Hiroyuki Kimura, Shin-ichi Adachi

    Journal of Synchrotron Radiation　29　(6)　2022/11/01

    Publisher: International Union of Crystallography (IUCr)

    DOI： 10.1107/s1600577522008724 　

    eISSN： 1600-5775

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    A picosecond pump–probe resonant soft X-ray scattering measurement system has been developed at the Photon Factory storage ring for highly efficient data collection. A high-repetition-rate high-power compact laser system has been installed to improve efficiency via flexible data acquisition to a sub-MHz frequency in time-resolved experiments. Data are acquired by gating the signal of a channel electron multiplier with a pulse-counting mode capable of discriminating single-bunch soft X-ray pulses in the dark gap of the hybrid operation mode in the storage ring. The photoinduced dynamics of magnetic order for multiferroic manganite SmMn2O5 are clearly demonstrated by the detection of transient changes in the resonant soft X-ray scattering intensity around the Mn LIII- and O K-edges.

  23. Spin-charge coupling and decoupling in perovskite-type iron oxides (Sr1-xBax)2/3La1/3FeO3

    M. Onose, H. Takahashi, T. Saito, T. Kamiyama, R. Takahashi, H. Wadati, S. Kitao, M. Seto, H. Sagayama, Y. Yamasaki, T. Sato, F. Kagawa, S. Ishiwata

    Physical Review Materials　6　(9)　2022/09

    DOI： 10.1103/PhysRevMaterials.6.094401 　

    eISSN： 2475-9953

  24. Photoinduced transient states of antiferromagnetic orderings in La1/3Sr2/3FeO3 and SrFeO3-delta thin films observed through time-resolved resonant soft x-ray scattering

    Kohei Yamamoto, Tomoyuki Tsuyama, Suguru Ito, Kou Takubo, Iwao Matsuda, Niko Pontius, Christian Schuessler-Langeheine, Makoto Minohara, Hiroshi Kumigashira, Yuichi Yamasaki, Hironori Nakao, Youichi Murakami, Takayoshi Katase, Toshio Kamiya, Hiroki Wadati

    NEW JOURNAL OF PHYSICS　24　(4)　2022/04

    DOI： 10.1088/1367-2630/ac5f31 　

    ISSN： 1367-2630

  25. Phase Retrieval Algorithm based on Total Variation Regularization for Ferromagnetic Domain Patterns

    Yuichi Yokoyama, Yuichi Yamasaki, Masato Okada, Masaichiro Mizumaki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　91　(3)　2022/03

    DOI： 10.7566/JPSJ.91.034701 　

    ISSN： 0031-9015

  26. Zoology of Multiple‐ Q Spin Textures in a Centrosymmetric Tetragonal Magnet with Itinerant Electrons

    Nguyen Duy Khanh, Taro Nakajima, Satoru Hayami, Shang Gao, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Rina Takagi, Yukitoshi Motome, Yoshinori Tokura, Taka‐hisa Arima, Shinichiro Seki

    Advanced Science　2105452-2105452　2022/01/28

    Publisher: Wiley

    DOI： 10.1002/advs.202105452 　

    ISSN： 2198-3844

    eISSN： 2198-3844

  27. Theoretical investigation on the electronic state of RuO2 by means of X-ray magnetic circular dichroism

    Sasabe Norimasa, Mizumaki Masaichiro, Yamasaki Yuichi, Uozumi Takayuki

    Meeting Abstracts of the Physical Society of Japan　77.2　1383-1383　2022

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.77.2.0_1383 　

    eISSN： 2189-0803

  28. Topological charge of soft X-ray vortex beam determined by inline holography

    Ishii, Y., Nakao, H., Mizumaki, M., Wakabayashi, Y., Arima, T.-H., Yamasaki, Y.

    Scientific Reports　12　(1)　2022

    DOI： 10.1038/s41598-022-04933-5 　

    ISSN： 2045-2322

  29. X-ray study of ferroic octupole order producing anomalous Hall effect

    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

  30. Frustration-driven magnetic fluctuations as the origin of the low-temperature skyrmion phase in Co7Zn7Mn6

    V. Ukleev, K. Karube, P. M. Derlet, C. N. Wang, H. Luetkens, D. Morikawa, A. Kikkawa, L. Mangin-Thro, A. R. Wildes, Y. Yamasaki, Y. Yokoyama, L. Yu, C. Piamonteze, N. Jaouen, Y. Tokunaga, H. M. Rønnow, T. Arima, Y. Tokura, Y. Taguchi, J. S. White

    npj Quantum Materials　6　(1)　2021/12

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41535-021-00342-5 　

    eISSN： 2397-4648

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    <title>Abstract</title>In chiral cubic helimagnets, phases of magnetic skyrmions—topologically protected spin whirls—are stabilized by thermal fluctuations over a narrow region directly below the magnetic ordering temperature <italic>T</italic>c. Due to often being touted for use in applications, there is a high demand to identify new ways to stabilize equilibrium skyrmion phases far below <italic>T</italic>c where they may display an enhanced robustness against external perturbation due to a larger magnetic order parameter. Here, from quantum beam experiments on the chiral magnet Co7Zn7Mn6, we unveil a direct correlation between the stability of its second skyrmion phase-stable far from <italic>T</italic>c, and a concomitant enhancement of an underlying magnetic fluctuation rate that is driven by geometric magnetic frustration. The influences of other leading skyrmion stability mechanisms, such as those derived from thermal fluctuations and low <italic>T</italic> cubic anisotropies, are shown to be weak in this system. We therefore advance the existence of a fundamental mechanism for stabilizing topological skyrmions in Co7Zn7Mn6 chiral magnet that draws upon magnetic frustration as the key ingredient.

  31. A Global Shutter Wide Dynamic Range Soft X-Ray CMOS Image Sensor With Backside-Illuminated Pinned Photodiode, Two-Stage Lateral Overflow Integration Capacitor, and Voltage Domain Memory Bank

    Hiroya Shike, Rihito Kuroda, Ryota Kobayashi, Maasa Murata, Yasuyuki Fujihara, Manabu Suzuki, Shoma Harada, Taku Shibaguchi, Naoya Kuriyama, Takaki Hatsui, Jun Miyawaki, Tetsuo Harada, Yuichi Yamasaki, Takeo Watanabe, Yoshihisa Harada, Shigetoshi Sugawa

    IEEE TRANSACTIONS ON ELECTRON DEVICES　68　(4)　2056-2063　2021/04

    DOI： 10.1109/TED.2021.3062576 　

    ISSN： 0018-9383

    eISSN： 1557-9646

  32. Charge-Ordered State and Low-Dimensional Magnetic Fluctuations in Yb5Ge4 Single Crystal

    Shinji Michimura, Masashi Kosaka, Ayumi Machida, Ryosuke Numakura, Ryosuke Iizuka, Susumu Katano, Yoshiki Imai, Naoki Shirakawa, Yuichi Yamasaki, Hironori Nakao, Hitoshi Sato, Shigenori Ueda, Kojiro Mimura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　90　(4)　2021/04

    DOI： 10.7566/JPSJ.90.044703 　

    ISSN： 0031-9015

  33. Signature of anisotropic exchange interaction revealed by vector-field control of the helical order in a FeGe thin plate

    Victor Ukleev, Oleg Utesov, Le Yu, Chen Luo, Kai Chen, Florin Radu, Yuichi Yamasaki, Naoya Kanazawa, Yoshinori Tokura, Taka-hisa Arima, Jonathan S. White

    Physical Review Research　3　(1)　2021/01/29

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevresearch.3.013094 　

    eISSN： 2643-1564

  34. High-pressure synthesis of Ba2RhO4 , a rhodate analog of the layered perovskite Sr-ruthenate

    I. Kurata, José A. Flores-Livas, H. Sugimoto, H. Takahashi, H. Sagayama, Y. Yamasaki, T. Nomoto, R. Arita, S. Ishiwata

    Physical Review Materials　5　(1)　2021/01/26

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevmaterials.5.015001 　

    eISSN： 2475-9953

  35. Thin Film Fabrication and Novel Electronic Phases

    Fujioka, J., Yamasaki, Y.

    Springer Series in Materials Science　305　2021

    DOI： 10.1007/978-981-15-7929-5_5 　

    ISSN： 2196-2812 0933-033X

  36. Alloying-induced enhancement of thermopower in the Dirac-semimetal system Cd3-xZnxAs2

    Fujioka, J., Kriener, M., Hashizume, D., Yamasaki, Y., Taguchi, Y., Tokura, Y.

    Physical Review Materials　5　(9)　2021

    DOI： 10.1103/PhysRevMaterials.5.094201 　

    ISSN： 2475-9953

  37. Soft-X-Ray Vortex Beam Detected by Inline Holography

    Yuta Ishii, Kohei Yamamoto, Yuichi Yokoyama, Masaichiro Mizumaki, Hironori Nakao, Taka-hisa Arima, Yuichi Yamasaki

    Physical Review Applied　14　(6)　2020/12/24

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevapplied.14.064069 　

    eISSN： 2331-7019

  38. A global shutter wide dynamic range soft X-ray CMOS image sensor with BSI pinned photodiode, two-stage LOFIC and voltage domain memory bank

    H. Shike, R. Kuroda, R. Kobayashi, M. Murata, Y. Fujihara, M. Suzuki, T. Shibaguchi, N. Kuriyama, J. Miyawaki, T. Harada, Y. Yamasaki, T. Watanabe, Y. Harada, S. Sugawa

    Technical Digest - International Electron Devices Meeting, IEDM　2020-December　16.4.1-16.4.4　2020/12/12

    DOI： 10.1109/IEDM13553.2020.9372058 　

    ISSN： 0163-1918

  39. Complete phase diagram of Sr1–xLaxFeO3 with versatile magnetic and charge ordering

    M. Onose, H. Takahashi, H. Sagayama, Y. Yamasaki, S. Ishiwata

    Physical Review Materials　4　(11)　2020/11/30

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevmaterials.4.114420 　

    eISSN： 2475-9953

  40. Particle-size dependent structural transformation of skyrmion lattice

    R. Takagi, Y. Yamasaki, T. Yokouchi, V. Ukleev, Y. Yokoyama, H. Nakao, T. Arima, Y. Tokura, S. Seki

    Nature Communications　11　(1)　2020/11/11

    Publisher: Springer Science and Business Media {LLC}

    DOI： 10.1038/s41467-020-19480-8 　

    ISSN： 2041-1723

    eISSN： 2041-1723

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    <jats:title>Abstract</jats:title> <jats:p>Magnetic skyrmion is a topologically protected particle-like object in magnetic materials, appearing as a nanometric swirling spin texture. The size and shape of skyrmion particles can be flexibly controlled by external stimuli, which suggests unique features of their crystallization and lattice transformation process. Here, we investigated the detailed mechanism of structural transition of skyrmion lattice (SkL) in a prototype chiral cubic magnet Cu<jats:sub>2</jats:sub>OSeO<jats:sub>3</jats:sub>, by combining resonant soft X-ray scattering (RSXS) experiment and micromagnetic simulation. This compound is found to undergo a triangular-to-square lattice transformation of metastable skyrmions by sweeping magnetic field (<jats:italic>B</jats:italic>). Our simulation suggests that the symmetry change of metastable SkL is mainly triggered by the <jats:italic>B-</jats:italic>induced modification of skyrmion core diameter and associated energy cost at the skyrmion-skyrmion interface region. Such internal deformation of skyrmion particle has further been confirmed by probing the higher harmonics in the RSXS pattern. These results demonstrate that the size/shape degree of freedom of skyrmion particle is an important factor to determine their stable lattice form, revealing the exotic manner of phase transition process for topological soliton ensembles in the non-equilibrium condition.</jats:p>

  41. Topological metastability supported by thermal fluctuation upon formation of chiral soliton lattice in CrNb3S6

    T. Honda, Y. Yamasaki, H. Nakao, Y. Murakami, T. Ogura, Y. Kousaka, J. Akimitsu

    Scientific Reports　10　(1)　2020/10/29

    Publisher: Springer Science and Business Media {LLC}

    DOI： 10.1038/s41598-020-74945-6 　

    ISSN： 2045-2322

    eISSN： 2045-2322

    More details Close

    <jats:title>Abstract</jats:title> <jats:p>Topological magnetic structure possesses topological stability characteristics that make it robust against disturbances which are a big advantage for data processing or storage devices of spintronics; nonetheless, such characteristics have been rarely clarified. This paper focused on the formation of chiral soliton lattice (CSL), a one-dimensional topological magnetic structure, and provides a discussion of its topological stability and influence of thermal fluctuation. Herein, CSL responses against change of temperature and applied magnetic field were investigated via small-angle resonant soft X-ray scattering in chromium niobium sulfide (<jats:inline-formula><jats:alternatives><jats:tex-math>$$\hbox {CrNb}_3\hbox {S}_6$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mtext>CrNb</mml:mtext> <mml:mn>3</mml:mn> </mml:msub> <mml:msub> <mml:mtext>S</mml:mtext> <mml:mn>6</mml:mn> </mml:msub> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>). CSL transformation relative to the applied magnetic field demonstrated a clear agreement with the theoretical prediction of the sine-Gordon model. Further, there were apparent differences in the process of chiral soliton creation and annihilation, discussed from the viewpoint of competing between thermal fluctuation and the topological metastability.</jats:p>

  42. Multiplication Method for Fine-Tuning Regularization Parameter of a Sparse Modeling Technique Tentatively Optimized via Cross Validation

    Yuichi Yamasaki

    Journal of the Physical Society of Japan　2020/09/15

    DOI： 10.7566/jpsj.89.094804 　

    ISSN： 0031-9015 1347-4073

  43. Augmented Magnetic Octupole in Kagomé 120-degree Antiferromagnets Detectable via X-ray Magnetic Circular Dichroism

    Yuichi Yamasaki

    Journal of the Physical Society of Japan　89　(8)　2020/08/15

    DOI： 10.7566/jpsj.89.083703 　

    ISSN： 1347-4073

  44. Topological Nernst Effect of the Two-Dimensional Skyrmion Lattice

    Yuichi Yamasaki

    Physical Review Letters　2020/08/12

    DOI： 10.1103/physrevlett.125.076602 　

    ISSN： 0031-9007 1079-7114

  45. Topological Nernst Effect of the Two-Dimensional Skyrmion Lattice Peer-reviewed

    Max Hirschberger, Leonie Spitz, Takuya Nomoto, Takashi Kurumaji, Shang Gao, Jan Masell, Taro Nakajima, Akiko Kikkawa, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Yasujiro Taguchi, Ryotaro Arita, Taka-hisa Arima, Yoshinori Tokura

    Physical Review Letters　125　(7)　2020/08/12

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevlett.125.076602 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  46. Metamagnetic transitions and magnetoelectric responses in the chiral polar helimagnet Ni2InSbO6

    Yuichi Yamasaki

    Physical Review B　2020/08/05

    DOI： 10.1103/physrevb.102.054409 　

    ISSN： 2469-9950 2469-9969

  47. Metamagnetic transitions and magnetoelectric responses in the chiral polar helimagnet Ni2InSbO6 Peer-reviewed

    Y. Araki, T. Sato, Y. Fujima, N. Abe, M. Tokunaga, S. Kimura, D. Morikawa, V. Ukleev, Y. Yamasaki, C. Tabata, H. Nakao, Y. Murakami, H. Sagayama, K. Ohishi, Y. Tokunaga, T. Arima

    Physical Review B　102　(5)　2020/08/05

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.102.054409 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  48. Metastable solitonic states in the strained itinerant helimagnet FeGe

    Yuichi Yamasaki

    Physical Review B　2020/07/10

    DOI： 10.1103/physrevb.102.014416 　

    ISSN： 2469-9950 2469-9969

  49. Metastable solitonic states in the strained itinerant helimagnet FeGe Peer-reviewed

    Victor Ukleev, Yuichi Yamasaki, Oleg Utesov, Kiyou Shibata, Naoya Kanazawa, Nicolas Jaouen, Hironori Nakao, Yoshinori Tokura, Taka-hisa Arima

    Physical Review B　102　(1)　2020/07/10

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.102.014416 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  50. High-field depinned phase and planar Hall effect in the skyrmion host Gd2PdSi3

    Yuichi Yamasaki

    Physical Review B　101　(22)　2020/06/01

    DOI： 10.1103/physrevb.101.220401 　

    ISSN： 2469-9969

    eISSN： 2469-9969

  51. Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet Peer-reviewed

    Nguyen Duy Khanh, Taro Nakajima, Xiuzhen Yu, Shang Gao, Kiyou Shibata, Max Hirschberger, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Licong Peng, Kiyomi Nakajima, Rina Takagi, Taka-hisa Arima, Yoshinori Tokura, Shinichiro Seki

    NATURE NANOTECHNOLOGY　15　(6)　444-+　2020/06

    DOI： 10.1038/s41565-020-0684-7 　

    ISSN： 1748-3387

    eISSN： 1748-3395

  52. Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet

    Yuichi Yamasaki

    Nature Nanotechnology　2020/05/18

    DOI： 10.1038/s41565-020-0684-7 　

    ISSN： 1748-3387 1748-3395

  53. Field-induced spin reorientation in the antiferromagnetic Dirac material EuMnBi2 revealed by neutron and resonant x-ray diffraction

    Yuichi Yamasaki

    Physical Review B　2020/05/06

    DOI： 10.1103/physrevb.101.174411 　

    ISSN： 2469-9950 2469-9969

  54. Field-induced spin reorientation in the antiferromagnetic Dirac material EuMnBi2 revealed by neutron and resonant x-ray diffraction Peer-reviewed

    H. Masuda, H. Sakai, H. Takahashi, Y. Yamasaki, A. Nakao, T. Moyoshi, H. Nakao, Y. Murakami, T. Arima, S. Ishiwata

    Physical Review B　101　(17)　2020/05/06

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevb.101.174411 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  55. Observation of Chiral Magnetic Soliton Lattice State in CrNb3S6 by Coherent Soft X-ray Diffraction Imaging

    Chihiro Tabata, Yuichi Yamasaki, Yuichi Yokoyama, Rina Takagi, Takashi Honda, Yusuke Kousaka, Jun Akimitsu, Hironori Nakao

    Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)　2020/03/19

    Publisher: Journal of the Physical Society of Japan

    DOI： 10.7566/jpscp.30.011194 　

  56. Sparse Phase Retrieval Algorithm for Coherent X-ray Diffraction Imaging

    Yuichi Yamasaki

    Nihon Kessho Gakkaishi　2020/02/29

    DOI： 10.5940/jcrsj.62.10 　

    ISSN： 0369-4585 1884-5576

  57. Determination of crystallographic chirality of MnSi thin film grown on Si (111) substrate Peer-reviewed

    Yuichi Yamasaki

    Physical Review Materials　2020/01/21

    DOI： 10.1103/physrevmaterials.4.014407 　

    ISSN： 2475-9953

  58. Multiple-Q spin textures in itinerant magnet GdRu2Si2

    Nguyen Khanh, Nakajima Taro, Hayami Satoru, Gao Shang, Nakao Hironori, Sagayama Hajime, Yamasaki Yuichi, Motome Yukitoshi, Tokura Yoshinori, Arima Takahisa, Seki Shinichiro

    Meeting Abstracts of the Physical Society of Japan　75.1　1787-1787　2020

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.75.1.0_1787 　

    eISSN： 2189-0803

  59. Skyrmion phase and competing magnetic orders on a breathing kagomé lattice Peer-reviewed

    Yuichi Yamasaki

    Nature Communications　10　2019/12

    DOI： 10.1038/s41467-019-13675-4 　

    ISSN： 2041-1723

  60. Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet

    Yuichi Yamasaki

    Science　365　(6456)　914-+　2019/08/30

    DOI： 10.1126/science.aau0968 　

    ISSN： 1095-9203

    eISSN： 1095-9203

  61. Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet Peer-reviewed

    Kurumaji Takashi, Nakajima Taro, Hirschberger Max, Kikkawa Akiko, Yamasaki Yuichi, Sagayama Hajime, Nakao Hironori, Taguchi Yasujiro, Arima Taka-hisa, Tokura Yoshinori

    SCIENCE　365　(6456)　914-+　2019/08/30

    DOI： 10.1126/science.aau0968 　

    ISSN： 0036-8075

    eISSN： 1095-9203

  62. High pressure synthesis of a quasi-one-dimensional GdFeO3-type perovskite PrCuO3 with nearly divalent Cu ions Peer-reviewed

    Ito Masaharu, Takahashi Hidefumi, Sakai Hideaki, Sagayama Hajime, Yamasaki Yuichi, Yokoyama Yuichi, Setoyama Hiroyuki, Wadati Hiroki, Takahashi Kanako, Kusano Yoshihiro, Ishiwata Shintaro

    CHEMICAL COMMUNICATIONS　55　(61)　8931-8934　2019/08/07

    DOI： 10.1039/c9cc04656a 　

    ISSN： 1359-7345

    eISSN： 1364-548X

  63. Element-specific soft x-ray spectroscopy, scattering, and imaging studies of the skyrmion-hosting compound Co8Zn8Mn4

    Yuichi Yamasaki

    Physical Review B　99　(14)　2019/04/10

    DOI： 10.1103/physrevb.99.144408 　

    ISSN： 2469-9969

    eISSN： 2469-9969

  64. Sparse Phase Retrieval Algorithm for Observing Isolated Magnetic Skyrmions by Coherent Soft X-ray Diffraction Imaging

    Yuichi Yamasaki

    Journal of the Physical Society of Japan　88　(2)　024009-024009　2019/02/15

    DOI： 10.7566/jpsj.88.024009 　

    ISSN： 1347-4073

    eISSN： 1347-4073

  65. Magnetic structure of Eu-based layered magnet unraveled by resonant soft x-ray scattering

    Hirata Yasuyuki, Sakuragi Shunsuke, Ikeda Keisuke, Nakao Hironori, Yamasaki Yuichi, Sakagami Ryosuke, Kamihara Yoichi, Kondo Takeshi, Wadati Hiroki

    Meeting Abstracts of the Physical Society of Japan　74.2　1612-1612　2019

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.74.2.0_1612 　

    eISSN： 2189-0803

  66. Observation of square skyrmion lattice in a centrosymmetric non-frustrated magnet

    Nguyen Khanh, Nakajima Taro, Yu Xiuzhen, Gao Shang, Shibata Kiyou, Yamasaki Yuichi, Sagayama Hajime, Nakao Hironori, Peng Licong, Nakajima Kiyomi, Takagi Rina, Arima Takahisa, Tokura Yoshinori, Seki Shinichiro

    Meeting Abstracts of the Physical Society of Japan　74.2　2004-2004　2019

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.74.2.0_2004 　

    eISSN： 2189-0803

  67. Metastable skyrmion lattice in Cu2OSeO3

    Takagi Rina, Yamasaki Yuichi, Yokouchi Tomoyuki, Ukleev Victor, Yokoyama Yuichi, Arima Takahisa, Tokura Yoshinori, Seki Shinichiro

    Meeting Abstracts of the Physical Society of Japan　74.1　2108-2108　2019

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.74.1.0_2108 　

    eISSN： 2189-0803

  68. High pressure synthesis of a quasi-one-dimensional GdFeO3-type perovskite PrCuO3 with nearly divalent Cu ions

    Yuichi Yamasaki

    Chemical Communications　55　(61)　8931-8934　2019

    DOI： 10.1039/c9cc04656a 　

    ISSN： 1364-548X

    eISSN： 1364-548X

  69. Charge disproportionation of Mn 3d and O 2p electronic states depending on strength of p−d hybridization in (LaMnO3)2(SrMnO3)2 superlattices

    Yuichi Yamasaki

    Physical Review B　2018/12/26

    DOI： 10.1103/physrevb.98.245146 　

    ISSN： 2469-9950 2469-9969

  70. Observation of magnetic domains in Gd/Fe superlattices by soft x-ray coherence

    Wadati Hiroki, Yamamoto Kohei, Yamasaki Yuichi, Hirata Yasuyuki, Yamagami Kohei, Takubo Ko, Zhang Yujun, Ikeda Keisuke, Iwata Satoshi, Kato Takeshi, Arima Takahisa

    JSAP Annual Meetings Extended Abstracts　2018.2　1678-1678　2018/09/05

    Publisher: The Japan Society of Applied Physics

    DOI： 10.11470/jsapmeeting.2018.2.0_1678 　

    eISSN： 2436-7613

  71. Commensurate versus incommensurate charge ordering near the superconducting dome in Ir1-xPtxTe2 revealed by resonant x-ray scattering Peer-reviewed

    K. Takubo, K. Yamamoto, Y. Hirata, H. Wadati, T. Mizokawa, R. Sutarto, F. He, K. Ishii, Y. Yamasaki, H. Nakao, Y. Murakami, G. Matsuo, H. Ishii, M. Kobayashi, K. Kudo, M. Nohara

    Physical Review B　97　(20)　205142　2018/05/31

    Publisher: American Physical Society

    DOI： 10.1103/PhysRevB.97.205142 　

    ISSN： 2469-9969 2469-9950

  72. Tensile-Strain-Dependent Spin States in Epitaxial LaCoO3 Thin Films

    Yuichi Yamasaki

    Physical Review Letters　120　(20)　2018/05/17

    Publisher: American Physical Society

    DOI： 10.1103/physrevlett.120.206402 　

    ISSN： 1079-7114

  73. Thickness dependence and dimensionality effects on charge and magnetic orderings in La1/3Sr2/3FeO3 thin films Peer-reviewed

    Yuichi Yamasaki

    Physical Review B　97　(7)　1-5　2018/02/16

    DOI： 10.1103/physrevb.97.075134 　

    ISSN： 2469-9969

  74. Coherent resonant soft X-ray scattering study of magnetic textures in FeGe Peer-reviewed

    Victor Ukleev, Yuichi Yamasaki, Daisuke Morikawa, Naoya Kanazawa, Yoshihiro Okamura, Hironori Nakao, Yoshinori Tokura, Taka-hisa Arima

    QUANTUM BEAM SCIENCE　2　(3)　2018/01

    DOI： 10.3390/qubs2010003 　

    eISSN： 2412-382X

  75. Emergence and magnetic-field variation of chiral-soliton lattice and skyrmion lattice in the strained helimagnet Cu2OSeO3 Peer-reviewed

    Y. Okamura, Y. Yamasaki, D. Morikawa, T. Honda, V. Ukleev, H. Nakao, Y. Murakami, K. Shibata, F. Kagawa, S. Seki, T. Arima, Y. Tokura

    PHYSICAL REVIEW B　96　(17)　2017/11

    DOI： 10.1103/PhysRevB.96.174417 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  76. Spin State of Co3+ in LaCo1-xRhxO3 Studied Using X-ray Absorption Spectroscopy Peer-reviewed

    Takaaki Sudayama, Hironori Nakao, Yuichi Yamasaki, Youichi Murakami, Shinichiro Asai, Ryuji Okazaki, Yukio Yasui, Ichiro Terasaki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　86　(9)　2017/09

    DOI： 10.7566/JPSJ.86.094701 　

    ISSN： 0031-9015

  77. Role of commensurability of spin order for optical magnetoelectric effect with electromagnons in multiferroic YMn2O5 Peer-reviewed

    R. Masuda, Y. Kaneko, Y. Yamasaki, Y. Tokura, Y. Takahashi

    PHYSICAL REVIEW B　96　(4)　2017/07

    DOI： 10.1103/PhysRevB.96.041117 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  78. High-pressure synthesis of an unusual antiferromagnetic metal CaCoO3 with GdFeO3 -type perovskite structure Peer-reviewed

    T. Osaka, H. Takahashi, H. Sagayama, Y. Yamasaki, S. Ishiwata

    Physical Review B　95　(22)　224440　2017/06/30

    DOI： 10.1103/PhysRevB.95.224440 　

    ISSN： 2469-9969 2469-9950

  79. Directional electric-field induced transformation from skyrmion lattice to distinct helices in multiferroic Cu2OSeO3 Peer-reviewed

    Y. Okamura, Y. Yamasaki, D. Morikawa, T. Honda, V. Ukleev, H. Nakao, Y. Murakami, K. Shibata, F. Kagawa, S. Seki, T. Arima, Y. Tokura

    PHYSICAL REVIEW B　95　(18)　6　2017/05

    DOI： 10.1103/PhysRevB.95.184411 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  80. Electronic and crystal structures of SrCoO3 thin films grown by ozonization

    Yokoyama Y., Hirata Y., Yamamoto K., Yamasaki Y., Wadati H.

    Meeting Abstracts of the Physical Society of Japan　72.2　1768-1768　2017

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.72.2.0_1768 　

    eISSN： 2189-0803

  81. Magnetic structure of chiral polar magnet Ni2InSbO6

    Araki Yusuke, Tabata Chihiro, Nakao Hironori, Murakami Yoichi, Tokunaga Yusuke, Arima Taka-hisa, Sato Tatsuki, Fujima Yuri, Abe Nobuyuki, Tokunaga Masashi, Kimura Shojiro, Morikawa Daisuke, Victor Ukleev, Yamasaki Yuichi

    Meeting Abstracts of the Physical Society of Japan　72　(0)　1777-1777　2017

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.72.2.0_1777 　

  82. Observation of chiral soliton lattice and deformed skyrmion lattice in the strained helimagnet Cu2OSeO3

    Okamura Yoshihiro

    Meeting Abstracts of the Physical Society of Japan　72　(0)　878-878　2017

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.72.2.0_878 　

  83. Uniaxial pressure effects on spin-lattice coupled phase transitions in a geometrical frustrated magnet CuFeO2 Peer-reviewed

    H. Tamatsukuri, S. Aoki, S. Mitsuda, T. Nakajima, T. Nakamura, T. Itabashi, S. Hosaka, S. Ito, Y. Yamasaki, H. Nakao, K. Prokes, K. Kiefer

    PHYSICAL REVIEW B　94　(17)　7　2016/11

    DOI： 10.1103/PhysRevB.94.174402 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  84. 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)　6　2016/09

    DOI： 10.7566/JPSJ.85.094702 　

    ISSN： 0031-9015

  85. Surface Ordering of Orbitals at a Higher Temperature in LaCoO3 Thin Film Peer-reviewed

    Yuichi Yamasaki, Jun Fujioka, Hironori Nakao, Jun Okamoto, Takaaki Sudayama, Youichi Murakami, Masao Nakamura, Masashi Kawasaki, Takahisa Arima, Yoshinori Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　85　(2)　2016/03

    DOI： 10.7566/JPSJ.85.023704 　

    ISSN： 0031-9015

  86. 19aBN-3 Resonant x-ray scattering of Ir_<1-x>Pt_xTe_2

    Takubo K., Wadati H., Ootsuki D., Mizokawa T., Sutarto R., He F., Ishii K., Yamasaki Y., Nakao H., Murakami Y., Pyon S., Kudo K., Matsuo G., Ishii H., Kobayashi M., Nohara M.

    Meeting Abstracts of the Physical Society of Japan　71　1979-1979　2016

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.71.1.0_1979 　

    ISSN： 2189-079X

  87. 19pBM-12 X-ray emission spectroscopy study of epitaxial strain effects on spin states in LaCoO_3 thin films

    Yokoyama Y., Hirata Y., Yamamoto K., Takubo K., Asakura D., Ikenaga E., Kawasaki Y., Fujioka J., Nakamura M., Taguchi M., Tanaka A., Kawasaki M., Tokura Y., Wadati H.

    Meeting Abstracts of the Physical Society of Japan　71　2030-2030　2016

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.71.1.0_2030 　

    ISSN： 2189-079X

  88. Resonant x-ray scattering of Ir1-xPtxTe2II

    Takubo K., Yamamoto K., Mizokawa T., Sutarto R., He F., Ishii K., Yamasaki Y., Nakao H., Pyon S., Kudo K., Matuso G., Ishii H., Kobayashi M., Nohara M., Wadati H.

    Meeting Abstracts of the Physical Society of Japan　71　2227-2227　2016

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.71.2.0_2227 　

  89. CrNb3S6におけるカイラルソリトン格子の特異な磁場応答の観測 Peer-reviewed

    KEK proceedings 2016-5, 47-59　2016

  90. Quantum Hall effect in a bulk antiferromagnet EuMnBi2 with magnetically confined two-dimensional Dirac fermions Peer-reviewed

    Hidetoshi Masuda, Hideaki Sakai, Masashi Tokunaga, Yuichi Yamasaki, Atsushi Miyake, Junichi Shiogai, Shintaro Nakamura, Satoshi Awaji, Atsushi Tsukazaki, Hironori Nakao, Youichi Murakami, Taka-Hisa Arima, Yoshinori Tokura, Shintaro Ishiwata

    Science Advances　2　(1)　2016/01/01

    Publisher: American Association for the Advancement of Science

    DOI： 10.1126/sciadv.1501117 　

    ISSN： 2375-2548

  91. Magnetic and electronic states in (LaMnO3)2(SrMnO3)2 superlattice exhibiting a large negative magnetoresistance Peer-reviewed

    Hironori Nakao, Takaaki Sudayama, Masato Kubota, Jun Okamoto, Yuichi Yamasaki, Youichi Murakami, Hiroyuki Yamada, Akihito Sawa, Kazuaki Iwasa

    Physical Review B - Condensed Matter and Materials Physics　92　(24)　2015/12/07

    Publisher: American Physical Society

    DOI： 10.1103/PhysRevB.92.245104 　

    ISSN： 1550-235X 1098-0121

  92. Magnetic and electronic states in (LaMnO3)(2)(SrMnO3)(2) superlattice exhibiting a large negative magnetoresistance Peer-reviewed

    Hironori Nakao, Takaaki Sudayama, Masato Kubota, Jun Okamoto, Yuichi Yamasaki, Youichi Murakami, Hiroyuki Yamada, Akihito Sawa, Kazuaki Iwasa

    PHYSICAL REVIEW B　92　(24)　2015/12

    DOI： 10.1103/PhysRevB.92.245104 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  93. Dynamical process of skyrmion-helical magnetic transformation of the chiral-lattice magnet FeGe probed by small-angle resonant soft x-ray scattering Peer-reviewed

    Y. Yamasaki, D. Morikawa, T. Honda, H. Nakao, Y. Murakami, N. Kanazawa, M. Kawasaki, T. Arima, Y. Tokura

    PHYSICAL REVIEW B　92　(22)　2015/12

    DOI： 10.1103/PhysRevB.92.220421 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  94. Strain-sensitive spin-state ordering in thin films of perovskite LaCoO3 Peer-reviewed

    J. Fujioka, Y. Yamasaki, A. Doi, H. Nakao, R. Kumai, Y. Murakami, M. Nakamura, M. Kawasaki, T. Arima, Y. Tokura

    PHYSICAL REVIEW B　92　(19)　2015/11

    DOI： 10.1103/PhysRevB.92.195115 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  95. Uniaxial stress control of skyrmion phase Peer-reviewed

    Y. Nii, T. Nakajima, A. Kikkawa, Y. Yamasaki, K. Ohishi, J. Suzuki, Y. Taguchi, T. Arima, Y. Tokura, Y. Iwasa

    NATURE COMMUNICATIONS　6　2015/10

    DOI： 10.1038/ncomms9539 　

    ISSN： 2041-1723

  96. Two kinds of in-plane resistivity anisotropy in Fe1+delta Te (delta=0.09) as seen via synchrotron radiation x-ray diffraction and in situ resistivity measurements Peer-reviewed

    Taro Nakajima, Tadashi Machida, Hironori Kariya, Daiki Morohoshi, Yuichi Yamasaki, Hironori Nakao, Kazuto Hirata, Takashi Mochiku, Hiroyuki Takeya, Setsuo Mitsuda, Hideaki Sakata

    PHYSICAL REVIEW B　91　(20)　2015/05

    DOI： 10.1103/PhysRevB.91.205125 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  97. X-ray induced lock-in transition of cycloidal magnetic order in a multiferroic perovskite manganite Peer-reviewed

    Y. Yamasaki, H. Nakao, Y. Murakami, T. Nakajima, A. Lafuente Sampietro, H. Ohsumi, M. Takata, T. Arima, Y. Tokura

    PHYSICAL REVIEW B　91　(10)　2015/03

    DOI： 10.1103/PhysRevB.91.100403 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  98. X-ray study of metal-insulator transitions induced by W doping and photoirradiation in VO2 films Peer-reviewed

    D. Okuyama, K. Shibuya, R. Kumai, T. Suzuki, Y. Yamasaki, H. Nakao, Y. Murakami, M. Kawasaki, Y. Taguchi, Y. Tokura, T. Arima

    PHYSICAL REVIEW B　91　(6)　2015/02

    DOI： 10.1103/PhysRevB.91.064101 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  99. 18pCD-10 Manganite superlattice system exhibiting a large negative magnetoresistance studied by resonant soft x-ray scattering

    Nakao H., Sudayama T., Yamasaki Y., Murakami Y., Yamada H., Sawa A.

    Meeting Abstracts of the Physical Society of Japan　70　2021-2021　2015

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.2.0_2021 　

    ISSN： 2189-079X

  100. 22aBC-5 Spin-state blockade in Te^<6+>-substitution electron-doped LaCoO_3

    Tomiyasu K., Koyama S., Watahiki M., Sato M., Nishihara K., Onodera M., Iwasa K., Nojima T., Yamasaki Y., Nakao H., Murakami Y.

    Meeting Abstracts of the Physical Society of Japan　70　2071-2071　2015

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.1.0_2071 　

    ISSN： 2189-079X

  101. Neutron magnetic scattering study in manganite thin film system Peer-reviewed

    H. Nakao, H. Yamada, A. Sawa, K. Iwasa, J. Okamoto, T. Sudayama, Y. Yamasaki, Y. Murakami

    SOLID STATE COMMUNICATIONS　185　18-20　2014/05

    DOI： 10.1016/j.ssc.2014.01.019 　

    ISSN： 0038-1098

    eISSN： 1879-2766

  102. Antiferromagnetic Order of the Co2+ High-Spin State with a Large Orbital Angular Momentum in La1.5Ca0.5CoO4 Peer-reviewed

    Jun Okamoto, Hironori Nakao, Yuichi Yamasaki, Hiroki Wadati, Arata Tanaka, Masato Kubota, Kazumasa Horigane, Youichi Murakami, Kazuyoshi Yamada

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　83　(4)　2014/04

    DOI： 10.7566/JPSJ.83.044705 　

    ISSN： 0031-9015

  103. Extraordinarily large perpendicular magnetic anisotropy in epitaxially strained cobalt-ferrite CoxFe3-xO4(001) (x=0.75, 1.0) thin films (vol 103, 162407, 2013) Peer-reviewed

    Tomohiko Niizeki, Yuji Utsumi, Ryohei Aoyama, Hideto Yanagihara, Jun-ichiro Inoue, Yuichi Yamasaki, Hironori Nakao, Kazuyuki Koike, Eiji Kita

    APPLIED PHYSICS LETTERS　104　(5)　2014/02

    DOI： 10.1063/1.4864102 　

    ISSN： 0003-6951

    eISSN： 1077-3118

  104. Construction of a soft X-ray diffractometer with a 7.5-T superconducting magnet Peer-reviewed

    Jun Okamoto, Hironori Nakao, Yuichi Yamasaki, Takaaki Sudayama, Kensuke Kobayashi, Yukari Takahashi, Hiroyuki Yamada, Akihito Sawa, Masato Kubota, Reiji Kumai, Youichi Murakami

    1ST CONFERENCE ON LIGHT AND PARTICLE BEAMS IN MATERIALS SCIENCE 2013 (LPBMS2013)　502　(1)　2014

    DOI： 10.1088/1742-6596/502/1/012016 　

    ISSN： 1742-6588

  105. Magnetic and electronic properties of (LaMnO3) 5(SrMnO3)5 superlattice revealed by resonant soft X-ray scattering Peer-reviewed

    Masato Kubota, Hiroyuki Yamada, Hironori Nakao, Jun Okamoto, Yuichi Yamasaki, Akihito Sawa, Youichi Murakami

    Japanese Journal of Applied Physics　53　(5)　2014

    DOI： 10.7567/JJAP.53.05FH07 　

    ISSN： 1347-4065 0021-4922

  106. Multiple helimagnetic phases and topological Hall effect in epitaxial thin films of pristine and Co-doped SrFeO3 Peer-reviewed

    S. Chakraverty, T. Matsuda, H. Wadati, J. Okamoto, Y. Yamasaki, H. Nakao, Y. Murakami, S. Ishiwata, M. Kawasaki, Y. Taguchi, Y. Tokura, H. Y. Hwang

    PHYSICAL REVIEW B　88　(22)　2013/12

    DOI： 10.1103/PhysRevB.88.220405 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  107. Uniaxial-Pressure Effects on Spin-Driven Lattice Distortions in Geometrically Frustrated Magnets CuFe1-xGaxO2 (x=0, 0.035) Peer-reviewed

    Taro Nakajima, Yusuke Iguchi, Hiromu Tamatsukuri, Setsuo Mitsuda, Yuichi Yamasaki, Hironori Nakao, Noriki Terada

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　82　(11)　2013/11

    DOI： 10.7566/JPSJ.82.114711 　

    ISSN： 0031-9015

  108. Extraordinarily large perpendicular magnetic anisotropy in epitaxially strained cobalt-ferrite CoxFe3-xO4(001) (x=0.75, 1.0) thin films Peer-reviewed

    Tomohiko Niizeki, Yuji Utsumi, Ryohei Aoyama, Hideto Yanagihara, Jun-ichiro Inoue, Yuichi Yamasaki, Hironori Nakao, Kazuyuki Koike, Eiji Kita

    APPLIED PHYSICS LETTERS　103　(16)　2013/10

    DOI： 10.1063/1.4824761 　

    ISSN： 0003-6951

    eISSN： 1077-3118

  109. Dopant-dependence on charge-orbital order in impurity doped layered manganites Peer-reviewed

    Yuki Yamaki, Yuichi Yamasaki, Hironori Nakao, Youichi Murakami, Yoshio Kaneko, Yoshinori Tokura

    Journal of the Korean Physical Society　63　(3)　729-732　2013/08

    DOI： 10.3938/jkps.63.729 　

    ISSN： 0374-4884 1976-8524

  110. Terahertz magnetoelectric resonance enhanced by mutual coupling of electromagnons Peer-reviewed

    Y. Takahashi, Y. Yamasaki, Y. Tokura

    Physical Review Letters　111　(3)　2013/07/17

    DOI： 10.1103/PhysRevLett.111.037204 　

    ISSN： 0031-9007 1079-7114

  111. Spin-orbital superstructure in strained ferrimagnetic perovskite cobalt oxide Peer-reviewed

    J. Fujioka, Y. Yamasaki, H. Nakao, R. Kumai, Y. Murakami, M. Nakamura, M. Kawasaki, Y. Tokura

    Physical Review Letters　111　(2)　2013/07/09

    DOI： 10.1103/PhysRevLett.111.027206 　

    ISSN： 0031-9007 1079-7114

  112. X-ray photoinduced persistent and bidirectional phase transition enabled by impurity doping in layered manganite Peer-reviewed

    Y. Yamaki, Y. Yamasaki, H. Nakao, Y. Murakami, Y. Kaneko, Y. Tokura

    Physical Review B - Condensed Matter and Materials Physics　87　(8)　2013/02/28

    DOI： 10.1103/PhysRevB.87.081107 　

    ISSN： 1098-0121 1550-235X

  113. Enhanced ferromagnetic moment in Co-doped BiFeO3 thin films studied by soft x-ray circular dichroism

    Singh, V.R., Verma, V.K., Ishigami, K., Shibata, G., Yamazaki, Y., Fujimori, A., Takeda, Y., Okane, T., Saitoh, Y., Yamagami, H., Nakamura, Y., Azuma, M., Shimakawa, Y.

    Journal of Applied Physics　114　(10)　2013

    DOI： 10.1063/1.4821024 　

    ISSN： 0021-8979

  114. Diffractometer for small angle resonant soft X-ray scattering under magnetic field Peer-reviewed

    Yuichi Yamasaki, Takaaki Sudayama, Jun Okamoto, Hironori Nakao, Masato Kubota, Youichi Murakami

    Journal of Physics: Conference Series　425　(13)　2013

    DOI： 10.1088/1742-6596/425/13/132012 　

    ISSN： 1742-6596 1742-6588

    eISSN： 1742-6596

  115. Pseudogap-related charge dynamics in the layered nickelate R2-xSrxNiO4 (x similar to 1) Peer-reviewed

    M. Uchida, Y. Yamasaki, Y. Kaneko, K. Ishizaka, J. Okamoto, H. Nakao, Y. Murakami, Y. Tokura

    PHYSICAL REVIEW B　86　(16)　2012/10

    DOI： 10.1103/PhysRevB.86.165126 　

    ISSN： 1098-0121

  116. High-temperature thermoelectric properties of the double-perovskite ruthenium oxide (Sr1-xLax)(2)ErRuO6 Peer-reviewed

    Ryohei Takahashi, Ryuji Okazaki, Yukio Yasui, Ichiro Terasaki, Takaaki Sudayama, Hironori Nakao, Yuichi Yamasaki, Jun Okamoto, Youichi Murakami, Yoshinori Kitajima

    JOURNAL OF APPLIED PHYSICS　112　(7)　2012/10

    DOI： 10.1063/1.4757632 　

    ISSN： 0021-8979

  117. Orbital states of V trimers in BaV10O15 detected by resonant x-ray scattering Peer-reviewed

    K. Takubo, T. Kanzaki, Y. Yamasaki, H. Nakao, Y. Murakami, T. Oguchi, T. Katsufuji

    PHYSICAL REVIEW B　86　(8)　2012/08

    DOI： 10.1103/PhysRevB.86.085141 　

    ISSN： 1098-0121

  118. REXS contribution to electronic ordering investigation in solids Peer-reviewed

    T. A. W. Beale, G. Beutier, S. R. Bland, A. Bombardi, L. Bouchenoire, O. Bunau, S. Di Matteo, J. Fernandez-Rodriguez, J. E. Hamann-Borrero, J. Herrero-Martin, V. L. R. Jacques, R. D. Johnson, A. Juhin, T. Matsumura, C. Mazzoli, A. M. Mulders, H. Nakao, J. Okamoto, S. Partzsch, A. J. Princep, V. Scagnoli, J. Strempfer, C. Vecchini, Y. Wakabayashi, H. C. Walker, D. Wermeille, Y. Yamasaki

    EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS　208　(1)　89-98　2012/06

    DOI： 10.1140/epjst/e2012-01609-0 　

    ISSN： 1951-6355

  119. Ferromagnetism of cobalt-doped anatase TiO 2 studied by bulk- and surface-sensitive soft x-ray magnetic circular dichroism

    Singh, V.R., Ishigami, K., Verma, V.K., Shibata, G., Yamazaki, Y., Kataoka, T., Fujimori, A., Chang, F.-H., Huang, D.-J., Lin, H.-J., Chen, C.T., Yamada, Y., Fukumura, T., Kawasaki, M.

    Applied Physics Letters　100　(24)　2012

    DOI： 10.1063/1.4729123 　

    ISSN： 0003-6951

  120. 27aYH-2 Small Angle Resonant Soft X-ray Magnetic Scattering in (Fe,Co)Si Peer-reviewed

    Yamasaki Y., Tokura Y., Nakao H., Okamoto J., Murakami Y., Kubota M., Yu X. Z., Shibata K., Kanazawa N., Onose Y.

    Meeting Abstracts of the Physical Society of Japan　67　(0)　691-691　2012

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.67.1.3.0_691_3 　

    ISSN： 1342-8349

  121. Origin of the Large Polarization in Multiferroic YMnO3 Thin Films Revealed by Soft- and Hard-X-Ray Diffraction Peer-reviewed

    H. Wadati, J. Okamoto, M. Garganourakis, V. Scagnoli, U. Staub, Y. Yamasaki, H. Nakao, Y. Murakami, M. Mochizuki, M. Nakamura, M. Kawasaki, Y. Tokura

    PHYSICAL REVIEW LETTERS　108　(4)　2012/01

    DOI： 10.1103/PhysRevLett.108.047203 　

    ISSN： 0031-9007

  122. Nature of the coexisting phase in YMnO3 thin films revealed by soft and hard x-ray diffraction studies Peer-reviewed

    H. Wadati, J. Okamoto, M. Garganourakis, V. Scagnoli, U. Staub, Y. Yamasaki, H. Nakao, Y. Murakami, M. Nakamura, M. Kawasaki, Y. Tokura

    Phys. Rev. Lett.　108　047203　2012/01

    DOI： 10.1103/PhysRevLett.108.047203 　

  123. X-ray induced insulator-metal transition in a thin film of electron-doped VO2 Peer-reviewed

    K. Shibuya, D. Okuyama, R. Kumai, Y. Yamasaki, H. Nakao, Y. Murakami, Y. Taguchi, T. Arima, M. Kawasaki, Y. Tokura

    PHYSICAL REVIEW B　84　(16)　2011/10

    DOI： 10.1103/PhysRevB.84.165108 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  124. Effects of cation-size variance on spin and orbital orders in Eu1-x(La0.254Y0.746)(x) VO3 Peer-reviewed

    R. Fukuta, S. Miyasaka, K. Hemmi, S. Tajima, D. Kawana, K. Ikeuchi, Y. Yamasaki, A. Nakao, H. Nakao, Y. Murakami, K. Iwasa

    PHYSICAL REVIEW B　84　(14)　2011/10

    DOI： 10.1103/PhysRevB.84.140409 　

    ISSN： 1098-0121

  125. Bulk and surface magnetization of Co atoms in rutile Ti 1-xCoxO2-δ thin films revealed by x-ray magnetic circular dichroism

    Singh, V.R., Sakamoto, Y., Kataoka, T., Kobayashi, M., Yamazaki, Y., Fujimori, A., Chang, F.-H., Huang, D.-J., Lin, H.-J., Chen, C.T., Toyosaki, H., Fukumura, T., Kawasaki, M.

    Journal of Physics Condensed Matter　23　(17)　2011

    DOI： 10.1088/0953-8984/23/17/176001 　

    ISSN： 0953-8984 1361-648X

  126. Growth temperature dependence of the LaAlO3/SrTiO3 interfacial structure Peer-reviewed

    Yusuke Wakabayashi, Yoshihiro Yamasaki, Christopher Bell, Yasuyuki Hikita, Harold Y. Hwang, Tsuyoshi Kimura

    Journal of Physics: Conference Series　320　4　2011

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/1742-6596/320/1/012074 　

    ISSN： 1742-6596 1742-6588

  127. Critical competition between two distinct orbital-spin ordered states in perovskite vanadates Peer-reviewed

    J. Fujioka, T. Yasue, S. Miyasaka, Y. Yamasaki, T. Arima, H. Sagayama, T. Inami, K. Ishii, Y. Tokura

    PHYSICAL REVIEW B　82　(14)　2010/10

    DOI： 10.1103/PhysRevB.82.144425 　

    ISSN： 1098-0121

  128. Excess-electron induced polarization and magnetoelectric effect in yttrium iron garnet Peer-reviewed

    Y. Kohara, Y. Yamasaki, Y. Onose, Y. Tokura

    PHYSICAL REVIEW B　82　(10)　2010/09

    DOI： 10.1103/PhysRevB.82.104419 　

    ISSN： 1098-0121

  129. Observation of Spin Helicity Using Nonresonant Circularly Polarized X-ray Diffraction Analysis Peer-reviewed

    Hajime Sagayama, Nobuyuki Abe, Kouji Taniguchi, Taka-hisa Arima, Yuichi Yamasaki, Daisuke Okuyama, Yoshinori Tokura, Souichiro Sakai, Takeshi Morita, Takashi Komesu, Hiroyuki Ohsumi, Masaki Takata

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　79　(4)　2010/04

    DOI： 10.1143/JPSJ.79.043711 　

    ISSN： 0031-9015

  130. Observation of Spin Helicity Using Nonresonant Circularly Polarized X-ray Diffraction Analysis Peer-reviewed

    Hajime Sagayama, Nobuyuki Abe, Kouji Taniguchi, Taka-hisa Arima, Yuichi Yamasaki, Daisuke Okuyama, Yoshinori Tokura, Souichiro Sakai, Takeshi Morita, Takashi Komesu, Hiroyuki Ohsumi, Masaki Takata

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　79　(4)　043711　2010/04

    DOI： 10.1143/JPSJ.79.043711 　

    ISSN： 0031-9015

  131. Far-infrared optical study of electromagnons and their coupling to optical phonons in Eu1-xYxMnO3 (x=0.1, 0.2, 0.3, 0.4, and 0.45) Peer-reviewed

    Y. Takahashi, Y. Yamasaki, N. Kida, Y. Kaneko, T. Arima, R. Shimano, Y. Tokura

    PHYSICAL REVIEW B　79　(21)　2009/06

    DOI： 10.1103/PhysRevB.79.214431 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  132. Electrically driven spin excitation at THz frequencies in bc and ab spiral spin phases of perovskite manganites Peer-reviewed

    N. Kida, Y. Yamasaki, J. P. He, Y. Kaneko, Y. Ikebe, Y. Takahashi, R. Shimano, T. Arima, N. Nagaosa, Y. Tokura

    LXIII YAMADA CONFERENCE ON PHOTO-INDUCED PHASE TRANSITION AND COOPERATIVE PHENOMENA (PIPT3)　148　12038　2009

    DOI： 10.1088/1742-6596/148/1/012038 　

    ISSN： 1742-6588

  133. Evidence for an Electric-Dipole Active Continuum Band of Spin Excitations in Multiferroic TbMnO(3) Peer-reviewed

    Y. Takahashi, N. Kida, Y. Yamasaki, J. Fujioka, T. Arima, R. Shimano, S. Miyahara, M. Mochizuki, N. Furukawa, Y. Tokura

    PHYSICAL REVIEW LETTERS　101　(18)　2008/10

    DOI： 10.1103/PhysRevLett.101.187201 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  134. Electric control of spin helicity in a magnetic ferroelectric (vol 98, art no 147204, 2007) Peer-reviewed

    Y. Yamasaki, H. Sagayama, T. Goto, M. Matsuura, K. Hirota, T. Arima, Y. Tokura

    PHYSICAL REVIEW LETTERS　100　(21)　2008/05

    DOI： 10.1103/PhysRevLett.100.219902 　

    ISSN： 0031-9007

  135. Correlation between spin helicity and an electric polarization vector in quantum-spin chain magnet LiCu(2)O(2) Peer-reviewed

    S. Seki, Y. Yamasaki, M. Soda, M. Matsuura, K. Hirota, Y. Tokura

    PHYSICAL REVIEW LETTERS　100　(12)　2008/03

    DOI： 10.1103/PhysRevLett.100.127201 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  136. Magnetic reversal of the ferroelectric polarization in a multiferroic spinel oxide Peer-reviewed

    Y Yamasaki, S Miyasaka, Y Kaneko, JP He, T Arima, Y Tokura

    PHYSICAL REVIEW LETTERS　96　(20)　2006/05

    DOI： 10.1103/PhysRevLett.96.207204 　

    ISSN： 0031-9007

  137. Change in Lattice Modulation upon Colossal Magnetoelectric Transition in GdMnO3 and TbMnO3 Peer-reviewed

    T. Arima, T. Goto, Y. Yamasaki, S. Miyasaka, K. Ishii, M. Tsubota, T. Inami, Y. Murakami, Y. Tokura

    Physical Review B　72　100102　2005/09

    DOI： 10.1103/PhysRevB.72.100102 　

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    加藤大武, 高橋英史, 高橋英史, 奥山大輔, 山崎裕一, 石渡晋太郎, 石渡晋太郎

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    鬼頭俊介, 福田光, 上田健太郎, 金子良夫, 原武史, 澤博, 山崎裕一, 中尾裕則, 十倉好紀, 十倉好紀, 有場孝尚, 有場孝尚

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    KEK Progress Report (Web)　(2022-5)　2022

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    映像情報メディア学会技術報告 = ITE technical report　45　(11)　17-20　2021/03

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    Hironori Nakao, Yuichi Yamasaki, Masaichiro Mizumaki, Chihiro Tabata, Masako Sakamaki, Kenta Amemiya

    AIP Conference Proceedings　2054　2019/01/15

    DOI： 10.1063/1.5084666 　

    ISSN： 0094-243X

  15. (A,A’)2/3La1/3FeO3(A,A’:Ca,Sr,Ba)におけるスピン・電荷秩序に対する格子歪みの影響

    小野瀬雅穂, 高橋英史, 佐賀山基, 山崎裕一, 十倉好紀, 十倉好紀, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　74　(1)　2019

    ISSN： 2189-079X

  16. フェムト秒時間分解X線回折によるLaCoO3薄膜の電子-格子相関ダイナミクスの直接観測

    深谷亮, 山崎裕一, 中尾裕則, 野澤俊介, 田端千紘, LEE Sunghee, 佐藤篤志, LETRUN Romain, 片山哲夫, 大和田成起, 富樫格, 矢橋牧名, 藤岡淳, 藤岡淳, 十倉好紀, 十倉好紀, 足立伸一

    日本物理学会講演概要集(CD-ROM)　74　(1)　2019

    ISSN： 2189-079X

  17. 時間分解共鳴軟X線散乱によるLaCoO3薄膜の光誘起磁気・軌道秩序ダイナミクスの観測

    深谷亮, 山崎裕一, 田端千紘, 山本航平, 山本航平, 横山優一, 横山優一, 平田靖透, 平田靖透, PONTIUS Niko, SCHUESSLER‐LANGEHEINE Christian, 中尾裕則, 野澤俊介, 足立純一, 一柳光平, 福本恵紀, 藤岡淳, 和達大樹, 和達大樹, 十倉好紀, 十倉好紀, 足立伸一

    日本物理学会講演概要集(CD-ROM)　73　(1)　ROMBUNNO.24pK502‐7-1532　2018/03/23

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.73.1.0_1532 　

    ISSN： 2189-079X

  18. 反強磁性多層ディラック電子系EuMnBi2の磁気構造

    増田英俊, 酒井英明, 酒井英明, 高橋英史, 山崎裕一, 山崎裕一, 山崎裕一, 中尾朗子, 茂吉武人, 中尾裕則, 村上洋一, 有馬孝尚, 有馬孝尚, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　73　(1)　ROMBUNNO.23aK504‐6　2018/03/23

    ISSN： 2189-079X

  19. ペロブスカイト型酸化物Sr1-xLaxFeO3における多彩なスピン・電荷秩序相の全貌

    小野瀬雅穂, 高橋英史, 佐賀山基, 山崎裕一, 十倉好紀, 十倉好紀, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　73　(2)　2018

    ISSN： 2189-079X

  20. 擬1次元Cu2+‐O鎖をもつ新規ペロブスカイト型銅酸化物PrCuO3の高圧合成

    伊藤雅春, 高橋英史, 酒井英明, 酒井英明, 酒井英明, 越智正之, 酒井志朗, 有田亮太郎, 藤岡淳, 藤岡淳, 横山優一, 和達大樹, 佐賀山基, 山崎裕一, 草野圭弘, 十倉好紀, 十倉好紀, 石渡晋太郎, 石渡晋太郎

    高圧討論会講演要旨集　58th　12　2017/10/25

    ISSN： 0917-6373

  21. Cu2OSeO3における一軸応力によるカイラルソリトン格子の発現とスキルミオン格子の変形

    岡村嘉大, 山崎裕一, 山崎裕一, 森川大輔, 本田孝志, UKLEEV Victor, 中尾裕則, 村上洋一, 柴田基洋, 賀川史敬, 関真一郎, 有馬孝尚, 有馬孝尚, 十倉好紀, 十倉好紀

    日本物理学会講演概要集(CD-ROM)　72　(2)　ROMBUNNO.23pE26‐1-878　2017/09/25

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.72.2.0_878 　

    ISSN： 2189-079X

    eISSN： 2189-0803

  22. 共鳴軟X線非弾性散乱で観測したLaCoO3薄膜におけるdd励起の分散

    横山優一, 横山優一, 山崎裕一, 平田靖透, 平田靖透, 田久保耕, 宮脇淳, 原田慈久, 藤岡淳, 中村優男, 川崎雅司, 川崎雅司, 十倉好紀, 十倉好紀, 和達大樹, 和達大樹

    日本物理学会講演概要集(CD-ROM)　72　(2)　ROMBUNNO.23pPSA‐20-1223　2017/09/25

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.72.2.0_1223 　

    ISSN： 2189-079X

    eISSN： 2189-0803

  23. 新規ペロブスカイト型コバルト酸化物Sr1-xCaxCoO3の構造と物性

    小坂雄大, 高橋英史, 佐賀山基, 山崎裕一, 三宅厚志, 徳永将史, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　72　(2)　ROMBUNNO.22pF11‐6　2017/09/25

    ISSN： 2189-079X

  24. XAFSで観測した新奇ペロブスカイト型銅酸化物La1-xPrxCuO3の電子構造

    横山優一, 横山優一, 平田靖透, 平田靖透, 山崎裕一, 山崎裕一, 山本航平, 山本航平, 田久保耕, 伊奈稔哲, 水牧仁一朗, 伊藤雅春, 高橋英史, 酒井英明, 石渡晋太郎, 石渡晋太郎, 和達大樹, 和達大樹

    日本物理学会講演概要集(CD-ROM)　72　(1)　ROMBUNNO.18pL22‐7-2202　2017/03/21

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.72.1.0_2202 　

    ISSN： 2189-079X

    eISSN： 2189-0803

  25. 擬1次元Cu‐O鎖をもつ新規ペロブスカイトPrCuO3に対するLa置換効果および圧力効果

    伊藤雅春, 高橋英史, 藤岡淳, 酒井英明, 酒井英明, 佐賀山基, 山崎裕一, 山崎裕一, 草野圭弘, 横山優一, 田久保耕, 平田靖透, 和達大樹, 寺倉千恵子, 越智正之, 酒井志朗, 有田亮太郎, 十倉好紀, 十倉好紀, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　72　(1)　ROMBUNNO.18pL22‐6　2017/03/21

    ISSN： 2189-079X

  26. Novel development of resonant soft X-ray scattering

    30　(1)　3-12　2017/01

    Publisher: 日本放射光学会

    ISSN： 0914-9287

  27. 高分解能軟X線発光分光で観測したLaCoO3薄膜のスピン状態とエピタキシャル歪みの関係

    横山優一, 横山優一, 平田靖透, 平田靖透, 山本航平, 山本航平, 田久保耕, 宮脇淳, 原田慈久, 朝倉大輔, 池永英司, 山崎裕一, 山崎裕一, 藤岡淳, 中村優男, 白木将, 一杉太郎, 一杉太郎, 吉松公平, 大友明, 近松彰, 長谷川哲也, 田口宗孝, 田中新, 川崎雅司, 川崎雅司, 十倉好紀, 十倉好紀, 和達大樹, 和達大樹

    日本放射光学会年会・放射光科学合同シンポジウム(Web)　30th　2017

  28. 時間分解X線回折によるLaCoO3薄膜の光誘起構造ダイナミクス

    深谷亮, 山崎裕一, 山崎裕一, 中尾裕則, 野澤俊介, 一柳光平, 藤岡淳, 十倉好紀, 十倉好紀, 足立伸一

    KEK Progress Report (Web)　(2016-8)　ROMBUNNO.343 (WEB ONLY)　2017/01

    ISSN： 1344-6320

  29. Photoinduced dynamics of structure and orbital order in LaCoO3 thin film by time-resolved x-ray diffraction

    Fukaya R, Yamasaki Y, Nakao H, Nozawa S, Ichiyanagi K, Fujioka J, Tokura Y, Adachi S

    Meeting Abstracts of the Physical Society of Japan　72　(0)　1467-1467　2017

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.72.1.0_1467 　

    More details Close

    &lt;p&gt;薄膜化によるエピタキシャル歪により低温で強磁性を示すLaCoO_3_において、放射光X線パルスを利用したピコ秒時間分解X線回折測定を行い、光励起に伴う過渡的な構造変化及び軌道秩序変化を観測した。軌道秩序化による格子歪で生じるブラッグ反射回折点の分裂が光照射後に解消され、軌道秩序由来の超格子反射強度も減少した。これらの結果から、光励起で軌道秩序が融解し、構造相転移が生じていることが示唆された。&lt;/p&gt;

  30. 軟X線小角散乱を用いたマルチフェロイックCu2OSeO3における電場誘起スキルミオンらせん磁性転移の観測

    岡村嘉大, 山崎裕一, 山崎裕一, 森川大輔, 本田孝志, 中尾裕則, 村上洋一, 関真一郎, 賀川史敬, 有馬孝尚, 有馬孝尚, 十倉好紀, 十倉好紀

    KEK Progress Report (Web)　(2016-8)　ROMBUNNO.170 (WEB ONLY)　2017/01

    ISSN： 1344-6320

  31. XAFSで観測した新奇ペロブスカイト型銅酸化物La1-xPrxCuO3の電子構造

    横山優一, 横山優一, 平田靖透, 平田靖透, 山崎裕一, 山崎裕一, 山本航平, 山本航平, 田久保耕, 伊奈稔哲, 水牧仁一朗, 伊藤雅春, 高橋英史, 酒井英明, 石渡晋太郎, 石渡晋太郎, 和達大樹, 和達大樹

    KEK Progress Report (Web)　72.1　(2017-10)　ROMBUNNO.197 (WEB ONLY)-2202　2017

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.72.1.0_2202 　

    ISSN： 1344-6320

    eISSN： 2189-0803

  32. 新規ペロブスカイト型コバルト酸化物CaCoO3の構造と物性

    高橋英史, 小坂雄大, 佐賀山基, 山崎裕一, 山崎裕一, 石渡晋太郎, 石渡晋太郎

    KEK Progress Report (Web)　(2017-10)　ROMBUNNO.234 (WEB ONLY)　2017

    ISSN： 1344-6320

  33. 反強磁性多層ディラック電子系EuMnBi2における軟X線磁気共鳴散乱の観測

    増田英俊, 酒井英明, 山崎裕一, 山崎裕一, 中尾裕則, 村上洋一, 有馬孝尚, 有馬孝尚, 十倉好紀, 十倉好紀, 石渡晋太郎, 石渡晋太郎

    KEK Progress Report (Web)　(2016-8)　ROMBUNNO.306 (WEB ONLY)　2017/01

    ISSN： 1344-6320

  34. 層状反強磁性体EuMnBi2におけるディラック電子の量子化ホール抵抗の観測

    増田英俊, 酒井英明, 酒井英明, 徳永将史, 山崎裕一, 山崎裕一, 三宅厚志, 塩貝純一, 中村慎太郎, 淡路智, 塚崎敦, 中尾裕則, 村上洋一, 有馬孝尚, 有馬孝尚, 十倉好紀, 十倉好紀, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　71　(1)　ROMBUNNO.21ABN‐9-2195　2016/03/22

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.71.1.0_2195 　

    ISSN： 2189-079X

  35. α‐EuP3単結晶の高圧合成と特異な磁気輸送特性

    野本敦朗, 高橋英史, 増田英俊, 酒井英明, 酒井英明, 山崎裕一, 山崎裕一, 中尾裕則, 村上洋一, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　71　(1)　ROMBUNNO.21ABN‐11-2197　2016/03/22

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.71.1.0_2197 　

    ISSN： 2189-079X

  36. 擬1次元構造を有する新奇ペロブスカイト型銅酸化物の高圧合成と物性

    伊藤雅春, 酒井英明, 酒井英明, 藤岡淳, 高橋英史, 佐賀山基, 山崎裕一, 山崎裕一, 草野圭弘, 横山優一, 田久保耕, 平田靖透, 和達大樹, 十倉好紀, 十倉好紀, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　71　(1)　ROMBUNNO.22ABD‐8-2347　2016/03/22

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.71.1.0_2347 　

    ISSN： 2189-079X

  37. 共鳴軟X線小角散乱を用いたカイラルソリトン格子の磁場応答の観測

    本田孝志, 山崎裕一, 山崎裕一, 中尾裕則, 村上洋一, 小椋隆弘, 高阪勇輔, 高阪勇輔, 秋光純

    化合物新磁性材料専門研究会資料　(15)　22　2016/03/04

  38. 共鳴X線散乱でみたLa1/3Sr2/3FeO3の磁気秩序の膜厚依存

    山本航平, 山本航平, 平田靖透, 平田靖透, 堀尾眞史, 横山優一, 横山優一, 田久保耕, 簑原誠人, 組頭広志, 山崎裕一, 山崎裕一, 中尾裕則, 村上洋一, 藤森淳, 和達大樹, 和達大樹

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　63　2016/01/09

  39. 軟X線発光分光で見たエピタキシャル歪みとLaCoO3薄膜のスピン状態の関係

    横山優一, 横山優一, 平田靖透, 平田靖透, 山本航平, 山本航平, 田久保耕, 朝倉大輔, 山崎裕一, 山崎裕一, 藤岡淳, 中村優男, 川崎雅司, 川崎雅司, 十倉好紀, 十倉好紀, 和達大樹, 和達大樹

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　57　2016/01/09

  40. 共鳴軟X線小角散乱によるB20型構造FeGeにおけるスキルミオン格子の観測

    山崎裕一, 山崎裕一, 森川大輔, 本田孝志, 中尾裕則, 村上洋一, 金澤直也, 川崎雅司, 川崎雅司, 有馬孝尚, 有馬孝尚, 十倉好紀, 十倉好紀

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　62　2016/01/09

  41. 共鳴軟X線小角散乱を用いたマルチフェロイクスCu2OSeO3におけるスキルミオンダイナミクスの観測

    岡村嘉大, 山崎裕一, 山崎裕一, 森川大輔, 本田孝志, 中尾裕則, 村上洋一, 関真一郎, 賀川史敬, 有馬孝尚, 有馬孝尚, 十倉好紀, 十倉好紀

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　63　2016/01/09

  42. マルチフェロイクスBiFeO3における共鳴軟X線小角散乱

    山崎裕一, 山崎裕一, 本田孝志, 中尾裕則, 村上洋一, 伊藤利充, 牛山智晴, 富岡泰秀, 有馬孝尚, 有馬孝尚, 十倉好紀, 十倉好紀

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　87　2016/01/09

  43. カイラルソリトン格子CrNb3S6における特異的磁場応答

    本田孝志, 山崎裕一, 山崎裕一, 中尾裕則, 村上洋一, 小椋隆弘, 高阪勇輔, 秋光純, 秋光純

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　29th　63　2016/01/09

  44. 高分解能軟X線発光分光で観測したLaCoO3薄膜のスピン状態とエピタキシャル歪みの関係

    横山優一, 横山優一, 平田靖透, 平田靖透, 山本航平, 山本航平, 田久保耕, 宮脇淳, 原田慈久, 朝倉大輔, 池永英司, 山崎裕一, 山崎裕一, 藤岡淳, 中村優男, 白木將, 一杉太郎, 一杉太郎, 吉松公平, 大友明, 近松彰, 長谷川哲也, 田口宗孝, 田中新, 川崎雅司, 川崎雅司, 十倉好紀, 十倉好紀, 和達大樹, 和達大樹

    日本物理学会講演概要集(CD-ROM)　71　(2)　2016

    ISSN： 2189-079X

  45. 21pPSA-30 Photoinduced electron-lattice dynamics in LaCoO_3 thin films

    Fukaya R, Yamasaki Y, Nakao H, Nozawa S, Ichiyanagi K, Fujioka J, Tokura Y, Adachi S

    Meeting Abstracts of the Physical Society of Japan　71　(0)　1590-1590　2016

    Publisher: 一般社団法人 日本物理学会

    DOI： 10.11316/jpsgaiyo.71.1.0_1590 　

    ISSN： 2189-079X

  46. Thickness dependence of charge and magnetic orderings in La1/3Sr2/3FeO3 thin films studied by soft and hard x-ray

    Yamamoto K, Hirata Y, Horio M, Yokoyama Y, Takubo K, Minohara M, Kumigashira H, Yamasaki Y, Nakao H, Murakami Y, Fujimori A, Wadati H

    Meeting Abstracts of the Physical Society of Japan　71　(0)　2288-2288　2016

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.71.2.0_2288 　

    More details Close

    &lt;p&gt;La_1/3_Sr_2/3_FeO_3_薄膜は特徴的な電荷、磁気秩序を示すことが知られている。電荷秩序に対して硬X線散乱、磁気秩序に対して共鳴軟X線散乱を適用してピーク強度の温度変化、相関長を調べた。さらにすれすれ入射を用いて表面での磁気秩序の相関長を得た。その結果、面直方向、面内方向ともにその相関長は膜厚に比例して減少する傾向が見られた。表面近傍における転移温度は薄膜の転移温度と違いは見られなかった。&lt;/p&gt;

  47. 磁気渦を押すだけで生成•消去できる新手法を発見 -超省電力型の磁気メモリデバイス実現へ-

    新居陽一, 岩佐義宏, 中島多朗, 有馬孝尚, 吉川明子, 田口康二郎, 山﨑裕一, 十倉好紀, 大石一城, 鈴木淳市

    プレス発表：科学新聞　2015/11

  48. 中性子小角散乱を用いたカイラル磁性体MnSiの磁気秩序に対する一軸応力効果の研究

    中島多朗, 新居陽一, 吉川明子, 山崎裕一, 山崎裕一, 大石一城, 鈴木淳市, 田口康二郎, 岩佐義宏, 岩佐義宏, 十倉好紀, 十倉好紀, 有馬孝尚, 有馬孝尚

    日本物理学会講演概要集(CD-ROM)　70　(2)　ROMBUNNO.16ACD-6-1659　2015/09/24

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.2.0_1659 　

    ISSN： 2189-079X

  49. 共鳴軟X線小角散乱による磁気スキルミオン格子の観測

    山崎裕一, 山崎裕一, 森川大輔, 本田孝志, 中尾裕則, 村上洋一, 金澤直也, 川崎雅司, 川崎雅司, 有馬孝尚, 有馬孝尚, 十倉好紀, 十倉好紀

    日本物理学会講演概要集(CD-ROM)　70　(2)　ROMBUNNO.17ACH-2　2015/09/24

    ISSN： 2189-079X

  50. カイラルソリトン格子における磁場減少過程の特異的挙動の観測

    本田孝志, 山崎裕一, 山崎裕一, 中尾裕則, 村上洋一, 小椋隆弘, 高阪勇輔, 高阪勇輔, 秋光純

    日本物理学会講演概要集(CD-ROM)　70　(2)　ROMBUNNO.16ACD-4-1657　2015/09/24

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.2.0_1657 　

    ISSN： 2189-079X

  51. 多層ディラック電子系EuMnBi2におけるX線磁気共鳴散乱による巨大な層間磁気抵抗の起源探求

    増田英俊, 酒井英明, 酒井英明, 三宅厚志, 徳永将史, 山崎裕一, 山崎裕一, 中尾裕則, 村上洋一, 有馬孝尚, 十倉好紀, 十倉好紀, 石渡晋太郎, 石渡晋太郎

    日本物理学会講演概要集(CD-ROM)　70　(2)　ROMBUNNO.17ADC-9-1797　2015/09/24

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.2.0_1797 　

    ISSN： 2189-079X

  52. X-ray study of metal-insulator transitions induced by W doping and photoirradiation in VO2 films

    D. Okuyama, K. Shibuya, R. Kumai, T. Suzuki, Y. Yamasaki, H. Nakao, Y. Murakami, M. Kawasaki, Y. Taguchi, Y. Tokura, T. Arima

    Physical Review B - Condensed Matter and Materials Physics　91　(6)　2015/02/03

    Publisher: American Physical Society

    DOI： 10.1103/PhysRevB.91.064101 　

    ISSN： 1550-235X 1098-0121

  53. MnSiにおける磁気スキルミオン相の一軸応力制御―J‐PARC大観における一軸応力下中性子小角散乱―

    中島多朗, 新居陽一, 吉川明子, 山崎裕一, 山崎裕一, 大石一城, 鈴木淳市, 田口康二郎, 岩佐義宏, 岩佐義宏, 十倉好紀, 十倉好紀, 有馬孝尚, 有馬孝尚

    日本中性子科学会年会講演概要集　15th　15　2015

  54. 共鳴軟X線小角散乱による磁気スキルミオン格子の観測

    山崎裕一, 森川大輔, 本田孝志, 中尾裕則, 岡本淳, 須田山貴亮, 村上洋一, 金澤直也, 川崎雅司, 有馬孝尚, 十倉好紀

    物構研サイエンスフェスタ要旨集　3rd　39　2015

  55. 19aCD-2 Resonant soft X-ray diffraction study of the thickness-dependent magnetic ordering in La_<1/3>Sr_<2/3>FeO_3 thin films

    Yamamoto K, Hirata Y, Horio M, Yokoyama Y, Takubo K, Minohara M, Kumigashira H, Yamamsaki Y, Nakao H, Murakami Y, Fujimori A, Wadati H

    Meeting Abstracts of the Physical Society of Japan　70　(0)　2064-2064　2015

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.2.0_2064 　

    ISSN： 2189-079X

  56. 19pCF-6 Ultrafast melting of magnetic ordering in La_<1/3>Sr_<2/3>FeO_3 thin films observed by time-resolved resonant soft x-ray scattering

    Wadati H, Tsuyama T, Ito S, Pontius N, Schussler-Langeheine C, Matsuda I, Minohara M, Kumigashira H, Yamasaki Y, Nakao H, Murakami Y

    Meeting Abstracts of the Physical Society of Japan　70　(0)　1368-1368　2015

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.2.0_1368 　

    ISSN： 2189-079X

  57. 7pBG-1 Spin and orbital ordering in LaCoO_3 thin film observed by grazing-incidence resonant soft x-ray scattering

    Yamasaki Y., Fujioka J., Doi A., Nakao H., Okamoto J., Sudayama T., Murakami Y., Nakamura M., Kawasaki M., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　69　(2)　337-337　2014/08/22

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  58. 8pBK-7 X-ray study of the origin of W-doping induced metal-insulator transition in (V, W)O_2 thin-film

    Okuyama D., Shibuya K., Kumai R., Yamasaki Y., Nakao H., Murakami Y., Taguchi Y., Kawasaki M., Arima T., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　69　(2)　394-394　2014/08/22

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  59. 10aBD-12 Yb valence state of Yb_5Ge_4 studied by Diffraction Anomalous Fine Structure (DAFS)

    Michimura S., Machida A., Kirigane T., Kosaka M., Katano S., Inami T., Yamazaki Y., Nakao H.

    Meeting abstracts of the Physical Society of Japan　69　(2)　450-450　2014/08/22

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  60. 7aBD-5 Comparison of RSXS magnetic scattering and μSR in short-range magnetic correlation of La_<2-x>Sr_xNiO_4 (x=0.4〜1)

    Kojima K. M., Yamasaki Y., Miyazaki M., Hiraishi M., Yamauchi Ichihiro, Koda A., Kadono R., Uchida M., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　69　(2)　319-319　2014/08/22

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  61. 29pAY-9 X-ray Induced Phase Transition in a Multiferroic Manganite Gd_<0.5>Tb_<0.5>MnO_3

    Yamasaki Yuichi, Nakao Hironori, Murakami Youichi, Tokura Yoshinori

    Meeting abstracts of the Physical Society of Japan　69　(1)　532-532　2014/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  62. 30pCE-3 Correlation between crystallographic and resistivity anisotropy in a parent compound of Fe-chalcogenide superconductor FeTe

    Nakajima T., Machida T., Morohoshi D., Kariya H., Yamasaki Y., Nakao H., Takeya H., Mochiku T., Ooi S., Mizuguchi Y., Takano Y., Hirata K., Mitsuda S., Sakata H.

    Meeting abstracts of the Physical Society of Japan　69　(1)　676-676　2014/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  63. 28aPS-129 New Imcommensurate Magnetic Phase in MnCr_2O_4

    Kousaka Y., Yoshii T., Tomiyasu K., Kumai R., Yamasaki Y., Nakao H., Campo J., Andre G., Akimitsu J.

    Meeting abstracts of the Physical Society of Japan　69　(1)　622-622　2014/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  64. 微弱信号検出における実験室とKEK-PFとのコラボ:有機結晶における放射線損傷の克服

    野上由夫, 近藤隆祐, 中尾朗子, 小林賢介, 熊井玲児, 山崎裕一, 中尾裕則

    物構研サイエンスフェスタ要旨集　2013　2014

  65. Sm VO3の軌道秩序に対するSm及びVサイトの乱れの効果

    佐々木直哉, 逸見和宏, 福田龍一郎, 宮坂茂樹, 田島節子, 山崎裕一, 中尾朗子, 中尾裕則, 熊井玲児, 村上洋一

    物構研サイエンスフェスタ要旨集　2013　2014

  66. Development of an in-vacuum diffractometer for resonant soft X-ray scattering

    H. Nakao, Y. Yamasaki, J. Okamoto, T. Sudayama, Y. Takahashi, K. Kobayashi, R. Kumai, Y. Murakami

    1ST CONFERENCE ON LIGHT AND PARTICLE BEAMS IN MATERIALS SCIENCE 2013 (LPBMS2013)　502　2014

    DOI： 10.1088/1742-6596/502/1/012015 　

    ISSN： 1742-6588

  67. Molecular electronic states in charge transfer complex studied by x-ray absorption spectroscopy

    Y. Takahashi, H. Nakao, R. Kumai, S. Ishibashi, S. Horiuchi, M. Kohyama, K. Kobayashi, Y. Yamasaki, J. Okamoto, T. Sudayama, Y. Murakami, Y. Tokura

    Journal of Physics: Conference Series　502　(1)　2014

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/1742-6596/502/1/012036 　

    ISSN： 1742-6596 1742-6588

  68. X-ray diffraction measurements on frustrated magnets CuFe_<1-x>Ga_xO_2(x=0,0.035)under uniaxial pressure

    Nakajima Taro, Iguchi Yusuke, Tamatsukuri Hiromu, Mitsuda Setsuo, Yamasaki Yuichi, Nakao Hironori, Terada Noriki

    Meeting abstracts of the Physical Society of Japan　68　(2)　359-359　2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  69. Antiferromagnetic order of the Co^<2+> high-spin state with a large orbital moment in La_<1.5>Ca_<0.5> CoO_4

    Okamoto J., Nakao H., Yamasaki Y., Wadati H., Tanaka A., Kubota M., Murakami Y., Horigane K., Yamada K.

    Meeting abstracts of the Physical Society of Japan　68　(2)　483-483　2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  70. X-ray absorption study of LaCo_<1-x>Rh_xO_3 II

    Sudayama T., Yamasaki Y., Okamoto Y., Nakao H., Murakami Y., Asai S., Furuta N., Okazaki R., Yasui R., Terasaki I.

    Meeting abstracts of the Physical Society of Japan　68　(2)　482-482　2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  71. Artificial superlattice Mn thin films with the large magneto-resistance studied by resonant soft x-ray scattering under magnetic field

    Sudayama T., Yamasaki Y., Okamoto J., Nakao H., Murakami Y., Kubota M., Yamada H., Sawa A.

    Meeting abstracts of the Physical Society of Japan　68　(2)　538-538　2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  72. O 1s and Cr_2p XAS study of the electronic structures in Na_<1-x>Ca_xCr_2O_4

    Okamoto J., Takahashi Y., Sudayama T., Yamasaki Y., Nakao H., Sakurai H., Kao Ting-Hui, Yang Hung-Duen

    Meeting abstracts of the Physical Society of Japan　68　(2)　532-532　2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  73. Uniaxial pressure effect of in-plane electric registivity in parent material of iron-chalcogenide superconductor

    Morohoshi D., Kariya H., Machida T., Nakajima T., Takeya H., Mochiku T., Ooi S., Mizuguchi Y., Takano Y., Hirata K., Yamasaki Y., Nakao H., Mitsuda S., Sakata H.

    Meeting abstracts of the Physical Society of Japan　68　(2)　527-527　2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  74. Colossal dynamical magnetoelectric effect of electromagnons in multiferroic materials

    Takahashi Y., Yamasaki Y., Kaneko Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　68　(2)　648-648　2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  75. Magnetic structures of SrIrO_3/SrTiO_3 superlattice thin films studied by resonant x-ray magnetic diffraction

    Yamamura S, Wadati H, Ishii K, Yamasaki Y, Nakao H, Murakami Y, Matsuno J, Takagi H

    Meeting abstracts of the Physical Society of Japan　68　(2)　550-550　2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  76. マルチフェロイック物質におけるエレクトロマグノンの巨大な動的電気磁気効果

    高橋陽太郎, 山崎裕一, 金子良夫, 十倉好紀

    日本物理学会講演概要集　68　(1)　808　2013/03/05

    ISSN： 1342-8349

  77. 共鳴軟X線散乱でみた有機導体β‐(ET)2PF6の電荷秩序状態

    小林賢介, 中尾裕則, 中尾裕則, 熊井玲児, 熊井玲児, 中尾朗子, 岡本淳, 須田山貴亮, 山崎裕一, 高橋由香利, 高橋由香利, 村上洋一, 十倉好紀, 十倉好紀, 森初果

    日本物理学会講演概要集　68　(1)　910　2013/03/05

    ISSN： 1342-8349

  78. ペロブスカイト型LaCoO3薄膜における歪み誘起フェリ磁性とスピン・軌道秩序の観測

    藤岡淳, 山崎裕一, 中尾裕則, 熊井玲児, 村上洋一, 中村優男, 川崎雅司, 川崎雅司, 十倉好紀, 十倉好紀

    日本物理学会講演概要集　68　(1)　657　2013/03/05

    ISSN： 1342-8349

  79. 電子型強誘電性を示すTTF‐CAの分子の電子状態の研究

    高橋由香利, 高橋由香利, 中尾裕則, 中尾裕則, 熊井玲児, 熊井玲児, 熊井玲児, 石橋章司, 石橋章司, 堀内佐智雄, 堀内佐智雄, 香山正憲, 小林賢介, 山崎裕一, 岡本淳, 須田山貴亮, 村上洋一, 十倉好紀, 十倉好紀, 十倉好紀

    日本物理学会講演概要集　68　(1)　937　2013/03/05

    ISSN： 1342-8349

  80. LaCoO3薄膜におけるスピン状態秩序の観測

    山崎裕一, 藤岡淳, 須田山貴亮, 岡本淳, 中尾裕則, 熊井玲児, 村上洋一, 中村優男, 川崎雅司, 川崎雅司, 十倉好紀, 十倉好紀

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　26th　108　2013/01/12

  81. 有機強誘電体TTF‐CAの中性‐イオン性転移における電子状態の観測

    高橋由香利, 高橋由香利, 中尾裕則, 中尾裕則, 小林賢介, 熊井玲児, 熊井玲児, 熊井玲児, 山崎裕一, 岡本淳, 村上洋一, 堀内佐智雄, 堀内佐智雄, 石橋章司, 石橋章司, 十倉好紀, 十倉好紀, 十倉好紀

    日本放射光学会年会・放射光科学合同シンポジウム予稿集　26th　130　2013/01/12

  82. X-ray induced structural phase transition accompanying insulator-metal transition in W-doped VO_2 thin-film Invited Peer-reviewed

    OKUYAMA Daisuke, SHIBUYA Keisuke, KUMAI Reiji, YAMASAKI Yuichi, NAKAO Hironori, MURAKAMI Youichi, TAGUCHI Yasujiro, ARIMA Takahisa, KAWASAKI Masashi, TOKURA Yoshinori

    26　(6)　309-316　2013

    Publisher: 日本放射光学会

    ISSN： 0914-9287

  83. 21aPSB-8 Resonant soft x-ray scattering study of [(LaMnO_3)_3/(SrMnO_3)_3]

    Sudayama T., Okamoto J., Yamasaki Y., Nakao H., Murakami Y., Kubota M., Yamada H., Sawa A.

    Meeting abstracts of the Physical Society of Japan　67　(2)　588-588　2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  84. 20pFG-1 Dopant-dependence of x-ray photo-induced phase transition in La_<0.5>Sr_<1.5>MnO_4

    Yamaki Y., Yamasaki Y., Nakao H., Murakami Y., Kaneko Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　67　(2)　543-543　2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  85. 21pGB-2 Disappearance of magnetism at high doping regime (x〜1) of La_<2-x>Sr_xNiO_4 and its magnetic phase diagram

    Kojima K. M., Yamasaki Y., Miyazaki M., Hiraishi M., Koda A., Kadono R., Uchida M., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　67　(2)　608-608　2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  86. 20aFG-10 Two dimensional quantum critical phenomenon in three dimensional perovskite-type vanadium oxide (La_<0.254>Y_<0.746>)_<1-x>Ca_xVO_3

    Hemmi K., Sasaki N., Fukuta R., Miyasaka S., Tajima S., Honda F., Takeuchi T., Onuki Y., Yamasaki Y., Nakao H., Kumai R., Murakami Y.

    Meeting abstracts of the Physical Society of Japan　67　(2)　498-498　2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  87. TTF‐CAの中性・イオン性転移における分子の電子状態の直接観測

    中尾裕則, 中尾裕則, 中尾裕則, 高橋由香利, 高橋由香利, 高橋由香利, 小林賢介, 小林賢介, 熊井玲児, 熊井玲児, 熊井玲児, 山崎裕一, 山崎裕一, 岡本淳, 岡本淳, 須田山貴亮, 須田山貴亮, 北島義典, 村上洋一, 村上洋一, 堀内佐智雄, 堀内佐智雄, 十倉好紀, 十倉好紀, 十倉好紀

    日本物理学会講演概要集　67　(2)　800-800　2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  88. 3次元ペロブスカイト(La0.254Y0.746)1-xCaxVO3におけるモット転移近傍の2次元的量子臨界現象

    逸見和宏, 佐々木直哉, 福田龍一郎, 宮坂茂樹, 田島節子, 本多史憲, 竹内徹也, 大貫惇睦, 山崎裕一, 中尾裕則, 熊井玲児, 村上洋一

    日本物理学会講演概要集　67　(2)　498　2012/08/24

    ISSN： 1342-8349

  89. SmVO3の軌道秩序に対するSm及びVサイトの乱れの効果

    佐々木直哉, 逸見和宏, 福田龍一郎, 宮坂茂樹, 田島節子, 山崎裕一, 中尾朗子, 中尾裕則, 熊井玲児, 村上洋一

    日本物理学会講演概要集　67　(2)　591-591　2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  90. 25aPS-42 Study of magnetism in manganite superlattice by resonant soft x-ray scattering

    Kubota M., Yamada H., Okamoto J., Yamasaki Y., Nakao H., Murakami Y., Sawa A.

    Meeting abstracts of the Physical Society of Japan　67　(1)　602-602　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  91. 24aYF-8 X-ray induced phase transition in impurity-doped manganite

    Yamaki Y., Yamasaki Y., Nakao H., Murakami Y., Kaneko Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　67　(1)　550-550　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  92. 24pYF-1 Hard and soft x-ray diffraction studies of DyMnO_3 thin films

    Wadati H., Matsuda T., Scagnoli V., Huang S.W., Staub U., Okamoto J., Yamasaki Y., Nakao H., Murakami Y., Nakamura M., Kawasaki M., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　67　(1)　563-563　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  93. 25aYD-7 X-ray absorption study of LaCo_<1-x>Rh_xO_3

    Sudayama T., Kobayashi K., Yamasaki Y., Okamoto J., Nakao H., Murakami Y., Kitajima Y., Asai S., Furuta N., Okazaki R., Yasui Y., Terasaki I.

    Meeting abstracts of the Physical Society of Japan　67　(1)　590-590　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  94. 共鳴X線散乱によるURu2Si2の隠れた秩序状態の解明

    網塚浩, 田端千紘, 門別翔太, 柳澤達也, 横山淳, 桑原慶太郎, 須田山貴亮, 岡本淳, 山崎裕一, 中尾裕則, 村上洋一

    PFシンポジウム要旨集　29th　49　2012

  95. ペロブスカイト型バナジウム酸化物の磁気・軌道秩序に対するランダムネス効果

    宮坂茂樹, 福田龍一郎, 逸見和宏, 佐々木直哉, 田島節子, 川名大地, 池内和彦, 山崎裕一, 中尾朗子, 中尾裕則, 熊井玲児, 村上洋一, 岩佐和晃

    PFシンポジウム要旨集　29th　48　2012

  96. Impurity effect on orbital ordering and magnetic property in La 0.5Sr1.5MnO4

    Y. Yamaki, H. Nakao, Y. Yamasaki, Y. Murakami, Y. Kaneko, Y. Tokura

    Journal of Physics: Conference Series　400　(4)　2012

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/1742-6596/400/4/042071 　

    ISSN： 1742-6596 1742-6588

  97. Effects of cation-size variance on spin and orbital orders in Eu1-x(La0.254Y0.746)(x) VO3 Peer-reviewed

    R. Fukuta, S. Miyasaka, K. Hemmi, S. Tajima, D. Kawana, K. Ikeuchi, Y. Yamasaki, A. Nakao, H. Nakao, Y. Murakami, K. Iwasa

    PHYSICAL REVIEW B　84　(14)　140409　2011/10

    DOI： 10.1103/PhysRevB.84.140409 　

    ISSN： 1098-0121

  98. 21aGB-4 Dopant-dependence on charge/orbital ordering in La_<0.5>Sr_<1.5>MnO_4

    Yamaki Y., Nakao H., Yamasaki Y., Murakami Y., Kaneko Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　66　(2)　452-452　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  99. 21aGD-1 Randomness and Cr substitution effects on spin/orbital order in perovskite RVO_3

    Fukuta R., Henmi K., Sasaki N., Miyasaka S., Tajima S., Kawana D., Ikeuchi K., Yamasaki Y., Nakao A., Nakao H., Murakami Y., Iwasa K.

    Meeting abstracts of the Physical Society of Japan　66　(2)　457-457　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  100. 21aGB-8 Hard and soft x-ray diffraction studies studies of YMnO_3 thin films

    Wadati H., Okamoto J., Garganourakis M., Scagnoli V., Staub U., Yamasaki Y., Nakao H., Murakami Y., Nakamura M., Kawasaki M., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　66　(2)　453-453　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  101. 24pGE-5 X-ray absorption spectroscopy on R_<2-x>Sr_xNiO_4 (0.3≦x≦1.1) single crystals

    Uchida M., Yamasaki Y., Okamoto J., Kaneko Y., Nakao H., Murakami Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　66　(2)　653-653　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  102. 27pED-7 Interface structure of Mn-oxide film observed by surface x-ray diffraction technique

    Yamasaki Y., Wakabayashi Y., Okuyama D., Arima T., Nakamura M., Kawasaki M., Tokura Y., Kimura T.

    Meeting abstracts of the Physical Society of Japan　66　(1)　635-635　2011/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  103. 26pEF-11 Spin-orbital order and randomness effect in perovskite type vanadium oxides II

    Fukuta R, Henmi K, Miyasaka S, Tajima S, Kawana D, Ikeuchi K, Yamasaki Y, Nakao A, Nakao H, Murakami Y, Iwasa K

    Meeting abstracts of the Physical Society of Japan　66　(1)　610-610　2011/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  104. 27pED-1 Large negative magnetoresistance in superlattice (LaMnO_3)_2(SrMnO_3)_2

    Nakao H, Yamada H, Iwasa K, Yamasaki Y, Murakami Y, Sawa A

    Meeting abstracts of the Physical Society of Japan　66　(1)　634-634　2011/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  105. 28pEF-6 Resonant X-ray Scattering of CB-type Charge Order in Nd_<2-x>Sr_xNiO_4

    Yamasaki Y, Uchida M, Nakao H, Murakami Y, Tokura Y

    Meeting abstracts of the Physical Society of Japan　66　(1)　685-685　2011/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  106. ペロブスカイト型V酸化物の磁気・軌道秩序とランダムネス効果 II

    福田龍一郎, 逸見和宏, 宮坂茂樹, 田島節子, 川名大地, 池内和彦, 山崎裕一, 中尾朗子, 中尾裕則, 村上洋一, 岩佐和晃

    日本物理学会講演概要集　66　(1)　2011

    ISSN： 1342-8349

  107. An x-ray induced insulator-metal transition in an oxide thin film Peer-reviewed

    K. Shibuya, D. Okuyama, R. Kumai, Y. Yamasaki, H. Nakao, Y. Murakami, Y. Taguchi, T. Arima, M. Kawasaki, Y. Tokura

    Phys. Rev. B　84　(16)　165108　2011

    DOI： 10.1103/PhysRevB.84.165108 　

    ISSN： 1098-0121

  108. Critical competition between two distinct orbital-spin ordered states in perovskite vanadates Peer-reviewed

    J. Fujioka, T. Yasue, S. Miyasaka, Y. Yamasaki, T. Arima, H. Sagayama, T. Inami, K. Ishii, Y. Tokura

    PHYSICAL REVIEW B　82　(14)　144425　2010/10

    DOI： 10.1103/PhysRevB.82.144425 　

    ISSN： 1098-0121

  109. Excess-electron induced polarization and magnetoelectric effect in yttrium iron garnet Peer-reviewed

    Y. Kohara, Y. Yamasaki, Y. Onose, Y. Tokura

    PHYSICAL REVIEW B　82　(10)　104419　2010/09

    DOI： 10.1103/PhysRevB.82.104419 　

    ISSN： 1098-0121

  110. 23aWJ-5 Substitution effect on charge/orbital ordering in La_<0.5>Sr_<1.5>Mn_<1-x>Ga_xO_4

    Yamaki Y, Nakao H, Yamasaki Y, Kira H, Murakami Y, Kaneko Y, Tokura Y

    Meeting abstracts of the Physical Society of Japan　65　(2)　455-455　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  111. 23pWB-5 Spin-orbital order and randomness effect in perovskite type vanadium oxides

    Fukuta R, Henmi K, Miyasaka S, Tajima S, Yamasaki Y, Nakao A, Nakao H, Murakami Y

    Meeting abstracts of the Physical Society of Japan　65　(2)　498-498　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  112. 23pWB-6 Resonant x-ray scattering of BaV_<10>O_<15>

    Takubo K, Kanzaki T, Kajita T, Yamasaki Y, Nakao H, Murakami Y, Katsufuji T

    Meeting abstracts of the Physical Society of Japan　65　(2)　498-498　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  113. 23pWB-9 Photoinduced persistent insulator-metal transition in W-doped VO_2 film

    Okuyama D, Shibuya K, Kumai R, Yamasaki Y, Nakao H, Murakami Y, Taguchi Y, Arima T, Kawasaki M, Tokura Y

    Meeting abstracts of the Physical Society of Japan　65　(2)　499-499　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  114. 24aWJ-7 Detection of Toroidal Moment by Resonant X-ray Anomalous Tensor Scattering (ATS) Method in Hematite Fe_2O_3

    Yamasaki Yuichi, Nakao Hironori, Murakami Youichi

    Meeting abstracts of the Physical Society of Japan　65　(2)　550-550　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  115. 24pWJ-9 Large negative magnetoresistance in superlattice(LaMnO_3)_2(SrMnO_3)_2 studied by a resonant x-ray scattering

    Nakao H, Yamada H, Yamasaki Y, Murakami Y, Sawa A

    Meeting abstracts of the Physical Society of Japan　65　(2)　574-574　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  116. 23aGA-2 Interface structure of Mn-oxides film observed by surface x-ray diffraction technique

    Yamasaki Y., Wakabayashi Y., Okuyama D., Arima T., Nakamura M., Kawasaki M., Tokura Y., Kimura T.

    Meeting abstracts of the Physical Society of Japan　65　(1)　662-662　2010/03/01

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  117. Lattice dynamics in the ab- and bc-spiral spin-ordered states of perovskite manganites Peer-reviewed

    J. S. Lee, N. Kida, Y. Yamasaki, R. Shimano, Y. Tokura

    PHYSICAL REVIEW B　80　(13)　134409　2009/10

    DOI： 10.1103/PhysRevB.80.134409 　

    ISSN： 1098-0121

  118. Novel Multiferroic State of Eu1-xYxMnO3 in High Magnetic Fields Peer-reviewed

    M. Tokunaga, Y. Yamasaki, Y. Onose, M. Mochizuki, N. Furukawa, Y. Tokura

    PHYSICAL REVIEW LETTERS　103　(18)　187202　2009/10

    DOI： 10.1103/PhysRevLett.103.187202 　

    ISSN： 0031-9007

  119. Quantum magnetoelectric effect in iron garnet Peer-reviewed

    Yuichi Yamasaki, Yuki Kohara, Yoshinori Tokura

    PHYSICAL REVIEW B　80　(14)　140412　2009/10

    DOI： 10.1103/PhysRevB.80.140412 　

    ISSN： 1098-0121

  120. Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites [Invited] Peer-reviewed

    N. Kida, Y. Takahashi, J. S. Lee, R. Shimano, Y. Yamasaki, Y. Kaneko, S. Miyahara, N. Furukawa, T. Arima, Y. Tokura

    JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS　26　(9)　A35-A51　2009/09

    DOI： 10.1364/JOSAB.26.000A35 　

    ISSN： 0740-3224

    eISSN： 1520-8540

  121. 27aRL-7 An observation of spin chirality using non-resonant circularly-polarized synchrotron radiatoin x-rays

    Sagayama H., Taniguchi K., Abe N., Arima T., Okuyama D., Yamasaki Y., Tokura Y., Sakai S., Morita T., Komesu H., Ohsumi H., Takata M.

    Meeting abstracts of the Physical Society of Japan　64　(2)　537-537　2009/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  122. 28pRL-5 Magnetically Tunable Quantum Paraelectricity inYIG

    Yamasaki Y., Kohara Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　64　(2)　571-571　2009/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  123. Far-infrared optical study of electromagnons and their coupling to optical phonons in Eu1-x Yx MnO3 (x=0.1, 0.2, 0.3, 0.4, and 0.45) Peer-reviewed

    Y. Takahashi, Y. Yamasaki, N. Kida, Y. Kaneko, T. Arima, R. Shimano, Y. Tokura

    Physical Review B - Condensed Matter and Materials Physics　79　(21)　214431　2009/06/24

    DOI： 10.1103/PhysRevB.79.214431 　

    ISSN： 1098-0121 1550-235X

  124. Unconventional Ferroelectric Transition in the Multiferroic Compound TbMnO3 Revealed by the Absence of an Anomaly in c-Polarized Phonon Dispersion Peer-reviewed

    R. Kajimoto, H. Sagayama, K. Sasai, T. Fukuda, S. Tsutsui, T. Arima, K. Hirota, Y. Mitsui, H. Yoshizawa, A. Q. R. Baron, Y. Yamasaki, Y. Tokura

    PHYSICAL REVIEW LETTERS　102　(24)　247602　2009/06

    DOI： 10.1103/PhysRevLett.102.247602 　

    ISSN： 0031-9007

  125. Systematics of electromagnons in the spiral spin-ordered states of RMnO3 Peer-reviewed

    J. S. Lee, N. Kida, S. Miyahara, Y. Takahashi, Y. Yamasaki, R. Shimano, N. Furukawa, Y. Tokura

    PHYSICAL REVIEW B　79　(18)　180403　2009/05

    DOI： 10.1103/PhysRevB.79.180403 　

    ISSN： 1098-0121

  126. 27aTA-6 Dielectric Relaxation Behavior in Multiferroic RMnO_3

    Yamasaki Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　64　(1)　519-519　2009/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  127. マルチフェロイックEu1-xYxMnO3における光の電場誘起による磁気励起の全体像

    高橋陽太郎, 山崎裕一, 貴田徳明, 金子良夫, 有馬孝尚, 島野亮, 十倉好紀

    日本物理学会講演概要集　64　(1)　519　2009/03/03

    ISSN： 1342-8349

  128. Electrically driven spin excitation at THz frequencies in bc and ab spiral spin phases of perovskite manganites Peer-reviewed

    N. Kida, Y. Yamasaki, J. P. He, Y. Kaneko, Y. Ikebe, Y. Takahashi, R. Shimano, T. Arima, N. Nagaosa, Y. Tokura

    LXIII YAMADA CONFERENCE ON PHOTO-INDUCED PHASE TRANSITION AND COOPERATIVE PHENOMENA (PIPT3)　148　012038　2009

    DOI： 10.1088/1742-6596/148/1/012038 　

    ISSN： 1742-6588

  129. High-Field Study of Multiferroic Properties in Orthorhombic Eu1-xYxMnO3 Peer-reviewed

    M. Tokunaga, I. Katakura, Y. Yamasaki, Y. Onose, Y. Tokura

    25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4　150　042212　2009

    DOI： 10.1088/1742-6596/150/4/042212 　

    ISSN： 1742-6588

  130. Electric-Dipole Active Two-Magnon Excitation in ab Spiral Spin Phase of a Ferroelectric Magnet Gd0.7Tb0.3MnO3 Peer-reviewed

    Noriaki Kida, Yuichi Yamasaki, Ryo Shimano, Taka-hisa Arima, Yoshinori Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　77　(12)　123704　2008/12

    DOI： 10.1143/JPSJ.77.123704 　

    ISSN： 0031-9015

  131. Evidence for an Electric-Dipole Active Continuum Band of Spin Excitations in Multiferroic TbMnO(3) Peer-reviewed

    Y. Takahashi, N. Kida, Y. Yamasaki, J. Fujioka, T. Arima, R. Shimano, S. Miyahara, M. Mochizuki, N. Furukawa, Y. Tokura

    PHYSICAL REVIEW LETTERS　101　(18)　187201　2008/10

    DOI： 10.1103/PhysRevLett.101.187201 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  132. Electrically driven spin excitation in the ferroelectric magnet DyMnO(3) Peer-reviewed

    N. Kida, Y. Ikebe, Y. Takahashi, J. P. He, Y. Kaneko, Y. Yamasaki, R. Shimano, T. Arima, N. Nagaosa, Y. Tokura

    PHYSICAL REVIEW B　78　(10)　104414　2008/09

    DOI： 10.1103/PhysRevB.78.104414 　

    ISSN： 1098-0121

    eISSN： 2469-9969

  133. 20aQA-9 Anisotropic Magnetocapacitance Effect in YIG

    Kohara Y., Yamasaki Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　63　(2)　435-435　2008/08/25

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  134. 20aQA-8 Magnetic and dielectric relaxation phenomena in YIG

    Yamasaki Y., Kohara Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　63　(2)　435-435　2008/08/25

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  135. 21aQA-12 Electric-dipole active two-magnon excitation in ab sprial spin phase of Gd_<0.7>Tb_<0.3>MnO_3

    Kida N., Yamasaki Y., Shimano R., Arima T., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　63　(2)　483-483　2008/08/25

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  136. TbMnO3における光の電場誘起による磁気励起の全貌

    高橋陽太郎, 山崎裕一, 藤岡淳, 貴田徳明, 有馬孝尚, 島野亮, 十倉好紀

    日本物理学会講演概要集　63　(2)　484　2008/08/25

    ISSN： 1342-8349

  137. Cycloidal spin order in the a-axis polarized ferroelectric phase of orthorhombic perovskite manganite Peer-reviewed

    Y. Yamasaki, H. Sagayama, N. Abe, T. Arima, K. Sasai, M. Matsuura, K. Hirota, D. Okuyama, Y. Noda, Y. Tokura

    PHYSICAL REVIEW LETTERS　101　(9)　097204　2008/08

    DOI： 10.1103/PhysRevLett.101.097204 　

    ISSN： 0031-9007

  138. Electric control of spin helicity in a magnetic ferroelectric (vol 98, art no 147204, 2007) Peer-reviewed

    Y. Yamasaki, H. Sagayama, T. Goto, M. Matsuura, K. Hirota, T. Arima, Y. Tokura

    PHYSICAL REVIEW LETTERS　100　(21)　219902(E)　2008/05

    DOI： 10.1103/PhysRevLett.100.219902 　

    ISSN： 0031-9007

  139. Correlation between spin helicity and an electric polarization vector in quantum-spin chain magnet LiCu(2)O(2) Peer-reviewed

    S. Seki, Y. Yamasaki, M. Soda, M. Matsuura, K. Hirota, Y. Tokura

    PHYSICAL REVIEW LETTERS　100　(12)　127201　2008/03

    DOI： 10.1103/PhysRevLett.100.127201 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  140. 23aYB-4 Magnetization and Electric Polarization of (Eu,Y)MnO_3 in pulsed magnetic fields

    Tokunaga M., Yamasaki Y., Onose Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　63　(1)　516-516　2008/02/29

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  141. 23aYB-1 Magnetic Structure in the Ferroelectric Phase (P||a) of Gd_<0.7>Tb_<0.3>MnO_3

    Meeting abstracts of the Physical Society of Japan　63　(1)　516-516　2008/02/29

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  142. 23pRH-9 Correlation between spin helicity and electric polarization vector in quantum-spin chain magnet LiCu_2O_2

    Seki S., Yamasaki Y., Soda M., Matsuura M., Hirota K., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　63　(1)　520-520　2008/02/29

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  143. THz・遠赤外分光によるマルチフェロイクス物質RMnO3におけるエレクトロマグノンの観測

    高橋陽太郎, 貴田徳明, 山崎裕一, 藤岡淳, 賀川史敬, 村川寛, 金子良夫, HE J. P, 有馬孝尚, 島野亮, 十倉好紀

    日本物理学会講演概要集　63　(1)　518　2008/02/29

    ISSN： 1342-8349

  144. 23pRH-3 Gamut of spin excitation driven by light at THz frequencies in a multiferroic DyMnO_3

    Kida N., Ikebe Y., Takahashi Y., He J.P., Kaneko Y., Yamasaki Y., Shimano R., Arima T., Nagaosa N., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　63　(1)　518-518　2008/02/29

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  145. Cycloidal Spin Order in (Gd,Tb)MnO3 with Electric Polarization along the a-Axis

    H. Sagayama, N. Abe, K. Taniguchi, T. Arima, Y. Noda, M. Soda, M. Matsuura, K. Hirota, Y. Yamasaki, D. Okuyama, Y. Tokura

    Activity Report on Neutron Scattering Research: Experimental Reports　15　519　2008

  146. Ferroelectric phase transitions of 3d-spin origin in Eu(1-x)Y(x)MnO(3) Peer-reviewed

    Y. Yamasaki, S. Miyasaka, T. Goto, H. Sagayama, T. Arima, Y. Tokura

    PHYSICAL REVIEW B　76　(18)　184418　2007/11

    DOI： 10.1103/PhysRevB.76.184418 　

    ISSN： 1098-0121

  147. Magnetic field switching between the two orbital-ordered states in DyVO3 Peer-reviewed

    S. Miyasaka, T. Yasue, J. Fujioka, Y. Yamasaki, Y. Okimoto, R. Kumai, T. Arima, Y. Tokura

    PHYSICAL REVIEW LETTERS　99　(21)　217201　2007/11

    DOI： 10.1103/PhysRevLett.99.217201 　

    ISSN： 0031-9007

  148. 21pWH-4 An observation of spin chirality in DyMnO_3 using circularly-polarized synchrotron radiation x-rays

    Sagayama H., Abe N., Yamasaki Y., Okuyama D., Sakai S., Ohsumi H., Arima T., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　62　(2)　555-555　2007/08/21

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  149. 21pWH-5 Inelastic X-ray Scattering Study of Multiferroic TbMnO_3

    Sagayama H., Kajimoto R., Sasai K., Fukuda T., Tsutsui S., Arima T., Hirota K., Yoshizawa H., Baron A. Q. R., Yamasaki Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　62　(2)　556-556　2007/08/21

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  150. 21pWH-9 Magnetic Ferroelectricity in Yttrium Iron Garnet

    Meeting abstracts of the Physical Society of Japan　62　(2)　557-557　2007/08/21

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  151. Electric control of spin helicity in a magnetic ferroelectric Peer-reviewed

    Y. Yamasaki, H. Sagayama, T. Goto, M. Matsuura, K. Hirota, T. Arima, Y. Tokura

    PHYSICAL REVIEW LETTERS　98　(14)　147204　2007/04

    DOI： 10.1103/PhysRevLett.98.147204 　

    ISSN： 0031-9007

  152. Impurity-doping-induced ferroelectricity in the frustrated antiferromagnet CuFeO2 Peer-reviewed

    S. Seki, Y. Yamasaki, Y. Shiomi, S. Iguchi, Y. Onose, Y. Tokura

    PHYSICAL REVIEW B　75　(10)　100403　2007/03

    DOI： 10.1103/PhysRevB.75.100403 　

    ISSN： 1098-0121

    eISSN： 2469-9969

  153. 18aWG-7 Magnetic excitation of multiferroic manganltes revealed by THz time-domain spectroscopy

    Kida N., Ikebe Y., Shimano R., Yamasaki Y., Arima T., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　62　(1)　490-490　2007/02/28

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  154. 18pWG-1 Magnetic Ferroelectricity in spinel chromites MCr_2O_4(M=Co,Fe,Mn)

    Yamasaki Y., Miyasaka S., Kaneko Y., He J. P., Arima T., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　62　(1)　501-501　2007/02/28

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  155. 20aWF-1 Impurity-doping induced ferroelectricity in frustrated antiferromagnet CuFeO_2

    Seki S., Yamasaki Y., Shiomi Y., Iguchi S., Onose Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　62　(1)　604-604　2007/02/28

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  156. 18aWG-1 Fe-doping-induced charge-orbital ordering in (La_<0.7>Pr_<0.3>)_<0.65>Ca_<0.35>MnO_3

    Sakai H, Ito K, Yamasaki Y, Iguchi S, Kumai R, Tokura Y

    Meeting abstracts of the Physical Society of Japan　62　(1-3)　489-489　2007/02/28

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.1103/PhysRevB.76.155112 　

    ISSN： 1342-8349

  157. Spin-lattice coupling in ferroelectric spiral magnets: Comparison between the cases of (Tb,Dy)MnO3 and CoCr2O4 Peer-reviewed

    Taka-hisa Arima, Yuichi Yamasaki, Takeshi Goto, Satoshi Iguchi, Kenya Ohgushi, Shigeki Miyasaka, Yoshinori Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　76　(2)　023602　2007/02

    DOI： 10.1143/JPSJ.76.023602 　

    ISSN： 0031-9015

  158. Magnetic Reversal of the Ferroelectric Polarization in a Spinel-type CoCr2O4

    Y. Yamasaki, T. Arima, Y. Tokura

    Solid State Physics　42　(1)　29-36　2007

  159. Magnetic Reversal of the Ferroelectric Polarization in a Multiferroic Spinel Oxide Peer-reviewed

    Yuichi Yamasaki, Takahisa Arima, Yoshinori Tokura

    Kotai Butsuri　42　(1)　29-36　2007

    Publisher: アグネ技術センタ-

    ISSN： 0454-4544

  160. 25aZQ-6 Magnetic Reversal of the Ferroelectric Polarization in CoCr_2O_4

    Yamasaki Y., Kaneko Y., He J.-P., Ohgushi K., Iguchi S., Miyasaka S., Arima T., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　61　(2)　492-492　2006/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  161. 23aZQ-2 A Control of the Spin Helicity in TbMnO_3 by Applying External Electric Fields

    Sagayama H., Yamasaki Y., Goto T., Matsuura M., Hirota K., Arima T., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　61　(2)　386-386　2006/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  162. 23pZR-14 Magnetic Field Effects on the Orbital Ordered State of RVO_3

    Yasue T, Miyasaka S, Fujioka J, Yamasaki Y, Kumai R, Sagayama H, Arima T, Inami T, Tokura Y

    Meeting abstracts of the Physical Society of Japan　61　(2-3)　405-405　2006/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  163. Magnetic reversal of the ferroelectric polarization in a multiferroic spinel oxide (vol 96, pg 207204, 2006)

    Y Yamasaki, S Miyasaka, Y Kaneko, JP He, T Arima, Y Tokura

    PHYSICAL REVIEW LETTERS　96　(24)　2006/06

    DOI： 10.1103/PhysRevLett.96.249902 　

    ISSN： 0031-9007

  164. Magnetic reversal of the ferroelectric polarization in a multiferroic spinel oxide Peer-reviewed

    Y Yamasaki, S Miyasaka, Y Kaneko, JP He, T Arima, Y Tokura

    PHYSICAL REVIEW LETTERS　96　(20)　207204　2006/05

    DOI： 10.1103/PhysRevLett.96.207204 　

    ISSN： 0031-9007

  165. 27aRA-3 Changes in lattice modulation on magnetic ferroelectric transition in perovskite-type RMnO_3

    Meeting abstracts of the Physical Society of Japan　61　(1-3)　505-505　2006/03/04

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  166. Anticorrelation between ferromagnetism and ferroelectricity in perovskite manganites Peer-reviewed

    T Goto, Y Yamasaki, H Watanabe, T Kimura, Y Tokura

    PHYSICAL REVIEW B　72　(22)　220403　2005/12

    DOI： 10.1103/PhysRevB.72.220403 　

    ISSN： 1098-0121

  167. Magnetic-field-induced transition in the lattice modulation of colossal magnetoelectric GdMnO3 and TbMnO3 compounds Peer-reviewed

    T Arima, T Goto, Y Yamasaki, S Miyasaka, K Ishii, M Tsubota, T Inami, Y Murakami, Y Tokura

    PHYSICAL REVIEW B　72　(10)　100102(R)　2005/09

    DOI： 10.1103/PhysRevB.72.100102 　

    ISSN： 1098-0121

  168. 20aYH-2 Changes in lattice and spin modulations with applicaiton of magnetic fields in perovskite-type magnetic ferroelectrics RMnO_3(R=Gd, Tb)

    Goto T., Arima T., Yamasaki Y., Miyasaka S., Ishii K., Tsubota M., Inami T., Murakami Y., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　60　(2)　423-423　2005/08/19

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  169. 20aYH-3 Control of magnetoelectric phase in perovskite Gd_<1-x>Tb_yMnO_3(0≦y≦1)

    Yamasaki Y., Goto T., Kimura T., Tokura Y.

    Meeting abstracts of the Physical Society of Japan　60　(2)　423-423　2005/08/19

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

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Research Projects 12

  1. Advancing X-ray-induced phase transition research through the simultaneous use of two synchrotron radiation beams

    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: High Energy Accelerator Research Organization

    2025/04/01 - 2029/03/31

  2. 材料デジタルツインで加速する磁性デバイス開発

    山崎 裕一

    Offer Organization: 科学技術振興機構

    Category: 戦略的な研究開発の推進/戦略的創造研究推進事業/CREST

    2024 - 2029

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    高度情報化社会に伴う消費電力の増大が社会課題となる中、省エネルギーな磁性デバイス材料の開発が注目されています。しかし、デバイスの微細化や高速化は材料開発における障壁となっています。本研究では、先端計測技術で磁性デバイスを高い時空間解像度で可視化し、シミュレーションで再構成する材料デジタルツインを構築します。これにより材料特性の起源を解明し、革新的な磁性デバイスの開発を加速させます。

  3. Pioneering a method for visualizing magnetically excited states by separating the angular momentum of spins and orbitals

    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: National Institute for Materials Science

    2024/04/01 - 2027/03/31

  4. Development of Extended Magnetic Multipole Observation Technique by Soft X-ray Absorption and Scattering

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Transformative Research Areas (A)

    Institution: National Institute for Materials Science

    2024/04/01 - 2026/03/31

  5. 極小磁気テクスチャの動的計測のための反射型コヒーレント回折イメージング法の開発

    中尾 裕則, 山崎 裕一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 挑戦的研究(開拓)

    Institution: 大学共同利用機関法人高エネルギー加速器研究機構

    2022/06/30 - 2026/03/31

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    近年、磁気スキルミオンや磁気カイラルソリトンといった幾何学的な特徴（トポロジー）を有する磁気テクスチャが盛んに研究されている。これまでに研究代表者らは、磁気テクスチャの磁性を担う3d・4f電子状態を直接観測可能な軟X線を利用した共鳴X線散乱法と光のコヒーレンスを利用したコヒーレント回折イメージング法を組み合わせた磁気イメージング手法を確立し、磁気テクスチャの実空間・動的計測を実現させてきた。しかしながら、トポロジー起源の巨大な物性応答や次世代スピントロニクスでの利用などの観点より、より小さな磁気テクスチャの物質開発が進んできている。そこで本研究課題では、これまでの手法を極小磁気テクスチャの観測が可能となる反射配置での高角散乱を利用した磁気イメージングへと昇華させ、極小磁気テクスチャの実環境下動的(オペランド)計測の実現に挑戦する。 構築した入射X線からコヒーレント光を切り出すための新たな照明光学系の試験を行ったところ、簡便な数ミクロンサイズの集光から、仮想光源を入れることによるサブミクロン集光が可能となった。このような光と開発してきた反射型コヒーレント回折イメージング用2軸回折計を組み合わせ走査型のドメイン観測が可能となった。さらに試料位置の温度ドリフトや振動の問題を回避するために開発した小型冷凍機を組み合わせることで、温度変化に伴い出現する秩序相のドメイン観測にも成功した。また、テスト実験を行うことで、回折実験での試料の走査法などの問題点もわかりつつあり、実験装置の利用展開と並行して、装置の改良も進めている。

  6. 新たなマルチスケール軟X線回折顕微鏡の開発とその利用研究

    中尾 裕則, 山崎 裕一, 水牧 仁一朗

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 大学共同利用機関法人高エネルギー加速器研究機構

    2020/04/01 - 2023/03/31

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    我々が開発・研究してきた軟X線を用いたコヒーレント回折イメージング（CDI）手法は、メゾスコピックスケールの磁気構造体の実空間イメージングが可能で、原理的に入射X線の波長程度までの高空間分解能での実空間イメージングが実現できる実験手法である。しかしながら観測領域・位置が、コヒーレントX線を切り出すピンホールのサイズ・位置でそれぞれ決まってしまうため、広い空間スケールでの観測が困難であった。そこで本研究では、このCDI手法に新たな視野可変機能を付加し、簡便な広視野観測から、高空間分解能での観測まで連続的に観測可能な「マルチスケール軟X線回折顕微鏡」へと発展させ、メゾスコピック構造が起源となる物性の解明を目指している。 これまでに我々はこの「マルチスケール軟X線回折顕微鏡」を建設し、メゾスコピック構造である磁気テクスチャの実空間観測、視野可変機能の実証実験に成功したところである。さらに、建設してきたマルチスケール軟X線回折顕微鏡の新たな利用展開として、試料からの逆空間（回折）信号とフレネルゾーンプレートからダイレクトビームの干渉を利用したインラインホログラフィによるイメージング手法にも挑戦した。その結果、フォーク型回折格子により生成した軟X線光渦の位相分布の直接的な観測に成功した。さらに、この結果から、本手法が物性の起源として最近注目されている磁気テクスチャの中のトポロジカル欠陥を敏感に捉えられること、その欠陥構造の特徴量であるトポロジカルナンバーを決定できることを明らかにした。

  7. Visualization of magnon motion by time-resolved coherent soft x-ray microscopy

    YAMASAKI Yuichi

    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: National Institute for Materials Science

    2019/04/01 - 2022/03/31

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    In this study, we combined a magnetic imaging technique with high temporal and spatial resolution using synchrotron soft X-rays and magnetic excitation by microwave irradiation to observe magnetic dynamics, such as the spatial propagation of magnons, which are spin-excited quasiparticles in magnetic materials. As a result, we succeeded in constructing a method to measure ferromagnetic resonance with a time resolution of 50 picoseconds and observed element-selective, spin- and orbital-separated ferromagnetic resonance. In soft X-ray microscopy, we developed a scanning transmission soft X-ray microscope that focuses soft X-rays to a few hundred nanometers using a Fresnel zone plate, and an in-line holography microscope that uses a two-dimensional detector to measure the interference between the transmitted light of focused soft X-rays and diffracted images of the sample.

  8. Development of a multi-scale X-ray structure analysis system for single nanocrystals

    Ohwada Kenji

    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: National Institutes for Quantum Science and Technology

    2019/04/01 - 2022/03/31

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    We have developed a multi-scale X-ray structure analysis system for a single nanocrystal. In particular, the Bragg-CDI method, which is the core technique, was introduced for the first time in Japan and opened to public use. This method enables visualization of the three-dimensional structure of a single nanocrystal from 40 nm to 500 nm, and achieved multi-scale structural analysis by combining it with precision powder X-ray structural analysis. This made it possible to have an essential discussion toward elucidating the size effect of nanocrystals. This method has been applied to other materials and is showing great progress. The development of this technique and its application to nanocrystals have been highly evaluated and awarded at academic meetings, and invited lectures have been or will be set at several academic meetings.

  9. Development of soft x-ray ultrafast magnetic imaging for revealing time- and space- resolved spin dynamics

    Wadati Hiroki

    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: University of Hyogo

    2019/04/01 - 2022/03/31

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    In this study, we aimed to establish a measurement to observe both space- and time-resolved spin dynamics for each element, and to elucidate the photo-excited spin states.To achieve this goal, we established time-resolved coherent resonant soft-X-ray small-angle scattering by using synchrotron radiation X-ray and X-ray free electron lasers (XFEL), and time-resolved magneto-optical Kerr microscopes by using ultrashort laser pulses in the laboratory. We succeeded in observing the ferromagnetic dynamics of iron-platinum thin films by XFEL, the antiferromagnetic dynamics of perovskite-type iron-oxide thin films by synchrotron radiation X-ray, and the space- and time- resolved spin dynamics of spinel-type oxide thin films by laboratory laser.

  10. スパース位相回復法によるコヒーレント軟X線オペランド計測

    山崎 裕一

    Offer Organization: 科学技術振興機構

    Category: 戦略的な研究開発の推進/戦略的創造研究推進事業/さきがけ

    2017 - 2020

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    X線回折顕微鏡は、試料からのコヒーレント回折像に反復的位相回復法を適用して試料像を再構成するX線イメージング手法です。本研究では、デバイスや機能性材料の特性を解明するためにコヒーレント軟X線回折を利用したオペランド計測手法を開発します。特性発現に関与する活性領域の情報を効率よく抽出するために、スパースモデリングに基づく位相回復アルゴリズムや機械学習による特徴量の抽出方法を創出していきます。

  11. Development of resonant soft x-ray small-angle scattering method for observing magnetic texture

    Yamasaki Yuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (A)

    2016/04/01 - 2019/03/31

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    The purpose of this study was to observe nanometer-scale vortex-like magnetic structures called magnetic skyrmions by means of resonant soft x-ray small-angle scattering. Resonant soft x-ray scattering is an element-selective method that can observe the magnetic state by using soft x-rays of energy corresponding to the absorption edge of the target element. Using this method, we observed how magnetic skyrmions are generated and annihilated by an application of external electric field, and how magnetic structures change from magnetic skyrmions to magnetic chiral soliton lattices by tensile strain from the substrate. We also succeeded in reconstructing a real space image element-selectively with a spatial resolution of several tens of nanometers by a phase retrieval algorithm from a diffraction pattern obtained using coherent soft x-rays.

  12. Toroidal moment observed by resonant x-ray diffraction

    YAMASAKI Yuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: High Energy Accelerator Research Organization

    2010 - 2011

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    We have investigated the spatial order of dipole moment without inversion symmetry, such as an electric polarization and a toroidal moment, by the resonant x-ray scattering at K pre-edge absorption which is sensitive to symmetry breaking.

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