TOHOKU UNIVERSITY Researchers - Yusuke Wakabayashi

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Yusuke Wakabayashi

Section

Graduate School of Science

Job title

Professor

Degree

博士（理学）（慶應義塾大学）
修士（理学）（慶應義塾大学）

researchmap

https://researchmap.jp/y_waka

J-GLOBAL ID

200901055101546087

e-Rad No.

40334205

ORCID

https://orcid.org/0000-0003-3107-0338

Profile

I'm working on structural condensed matter physics. Origins of various properties of materials are examined from atomic arrangements, which are clarified by synchrotron x-ray diffraction. This approach to the condensed matter physics provides a bridging viewpoint between microscopic phenomena and macroscopic properties. I've studied various transition metal oxides, organic semiconductors, alloys, f-electron systems in the forms of single crystals, epitaxial films, or interfaces. Technically, I'm interested in superlattice reflections, diffuse scatterings, and surface scatterings.

Condensed matter physics based on structural information, this is what I'm interested in.

Research History 7

2019/04 - Present

Tohoku University　Graduate School of Science　Professor
2008/12 - 2019/03

Osaka university　School of Engineering Science　Associate Professor
2007/04 - 2008/11

Institute of Materials Structure Science　Assistant professor
2002/03 - 2007/03

Institute of Materials Structure Science　Research associate
2005/04 - 2006/03

Brookhaven National Laboratory　research collaborator
2001/04 - 2002/02

Chiba University　Graduate School of Science and Technology　Research associate
2000 - 2001

学振 DC2

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Education 3

Keio University　Graduate School of Science and Technology　Physics

1998/04 - 2001/03
Keio University　Graduate School of Science and Technology　Physics

1996/04 - 1998/03
Keio University　Faculty of Science and Technology　Physics

1992/04 - 1996/03

Committee Memberships 14

高エネルギー加速器研究機構 PF計画推進委員会 (委員)　他大学共同利用機関委員等

2024/05 - Present
International conference on surface x-ray and neutron scattering　International Advisory Committee

2016/07 - Present
日本放射光学会評議員　国内外学会役員等

2024/10 - 2026/09
PF-UA 戦略・将来計画担当幹事　他大学共同利用機関委員等

2021/04 - 2024/03
Japanese Society for Synchrotron Radiation Research　Editor in chief

2021/10 - 2023/09
Japanese Society for Synchrotron Radiation Research　Councilor

2021/10 - 2023/09
東京大学物性研究所共同利用施設専門委員会委員　他大学共同利用機関委員等

2021/04 - 2023/03
日本放射光学会　編集委員

2020/10 - 2022/09
SPRUC　利用委員長

2020/04 - 2022/03
日本放射光学会　評議員

2018/10 - 2020/09
SPRUC　利用幹事->企画幹事

2016/04 - 2020/03
Photon Factory Users' Association (PF-UA)　運営委員 (共同利用小委員会)

2015/04 - 2018/03
SPring-8協同体(SPRUC)　放射光科学将来ビジョン作業部会員

2013/04 - 2015/01
日本放射光学会　編集委員

2008/10 - 2010/09

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Professional Memberships 2

日本放射光学会
日本物理学会

Research Interests 3

Structural Materials Science
X-ray diffraction
Synchrotron Radiation

Research Areas 1

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

Awards 6

第22回論文賞

2017/03　日本物理学会
平成25年度文部科学大臣表彰若手科学者賞

2013/04　文部科学大臣
日本物理学会若手奨励賞(領域7)

2011/03　日本物理学会
Young scientist award of the Physical Society of Japan

2011
第12回日本放射光学会奨励賞

2008/01　日本放射光学会
藤原奨学基金藤原賞

2001/03　慶應義塾大学

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Papers 170

Structural, Photophysical, and Distributed Feedback Lasing Characteristics of Furan-Substituted Thiophene/Phenylene Co-Oligomer Single Crystals

Periyasamy Angamuthu Praveen, Thangavel Kanagasekaran, Chaoyan Ma, Masahiro Terada, Tienan Jin, Yusuke Wakabayashi, Hidekazu Shimotani

ACS Applied Materials & Interfaces　2025/07/02

DOI： 10.1021/acsami.5c05119 　
Non-destructive measurement of the charge transfer across LaMnO3/SrTiO3 interfaces

Shohei Miyagawa, Yuta Ishii, Masato Anada, Kazuki Nagai, Miho Kitamura, Hiroshi Kumigashira, Yusuke Wakabayashi

Journal of Applied Physics　2025/03/28

DOI： 10.1063/5.0258175 　
Nonferroelectric phase with loss of cycloidal magnetic structure in Tb_{0.515}Gd_{0.485}Mn_{2}O_{5}

Yuta Ishii, Terutoshi Sakakura, Yoshihisa Ishikawa, Ryoji Kiyanagi, Jana Lustikova, Takuya Aoyama, Kenya Ohgushi, Yusuke Wakabayashi, Hiroyuki Kimura, Yukio Noda

Physical Review B　110　(18)　2024/11/12
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevb.110.184404 　

ISSN： 2469-9950

eISSN： 2469-9969
(Proceedings) High-efficiency energy-domain multiline gamma-ray quasi-elastic scattering spectroscopy using triple absorbers Peer-reviewed

Ryoga Moroboshi, Masashi Kobayashi, Haruki Nishino, Toshiyuki Nishiyama Hiraki, Yoshiaki Honjo, Kazuo Kobayashi, Yasumasa Joti, Kyosuke Ozaki, Yasuhiko Imai, Mitsuhiro Yamaga, Tetsuya Abe, Nobumoto Nagasawa, Yoshitaka Yoda, Takaki Hatsui, Yusuke Wakabayashi, Makina Saito

Interactions　245　(1)　349　2024/11/04
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s10751-024-02186-4 　

eISSN： 3005-0731
Discovery of collective nonjumping motions leading to Johari–Goldstein process of stress relaxation in model ionic glass

Makina Saito, Takeaki Araki, Yohei Onodera, Koji Ohara, Makoto Seto, Yoshitaka Yoda, Yusuke Wakabayashi

Acta Materialia　120536-120536　2024/11
Publisher: Elsevier BV
DOI： 10.1016/j.actamat.2024.120536 　

ISSN： 1359-6454
Symmetry change in LaNiO3 films caused by epitaxial strain from LaAlO3, SrTiO3, and DyScO3 pseudocubic (001) surfaces

Fumiya Izumisawa, Yuta Ishii, Masatoshi Kimura, Takayoshi Katase, Toshio Kamiya, Jun-ichi Yamaura, Yusuke Wakabayashi

Journal of Applied Physics　2024/08/21

DOI： 10.1063/5.0221417 　
Optoelectronic Characteristics of Furan Substituted Thiophene/Phenylene Co-Oligomer Single Crystals for Organic Lasing

Praveen Periyasamy Angamuthu, Kanagasekaran Thangavel, Chaoyan Ma, Masahiro Terada, Tienan Jin, Yusuke Wakabayashi, Shimotani Hidekazu

Journal of Materials Chemistry C　2024/08
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d4tc03149k 　

ISSN： 2050-7526

eISSN： 2050-7534

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We design and synthesise an organic lasing system, 2,5‐bis(5‐{[1,1'‐biphenyl]‐4‐yl}thiophen‐2‐yl)furan, which has advanced optoelectronic properties. Grown as a single crystal, this monoclinic system exhibits typical H-aggregation and has a photoluminescence quantum...
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.
Broadband Quasielastic Scattering Spectroscopy Using a Multiline Frequency Comblike Spectrum in the Hard X-Ray Region

Makina Saito, Masashi Kobayashi, Haruki Nishino, Toshiyuki Nishiyama Hiraki, Yoshiaki Honjo, Kazuo Kobayashi, Yasumasa Joti, Kyosuke Ozaki, Yasuhiko Imai, Mitsuhiro Yamaga, Tetsuya Abe, Nobumoto Nagasawa, Yoshitaka Yoda, Ryo Mashita, Takaki Hatsui, Yusuke Wakabayashi

Physical Review Letters　132　(25)　2024/06/17
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevlett.132.256901 　

ISSN： 0031-9007

eISSN： 1079-7114
A Three‐Dimensionally Extended Metal–Organic Ladder Compound Exhibiting Proton Conduction

Hao Liang, Kazuya Otsubo, Yusuke Wakabayashi, Hajime Sagayama, Shogo Kawaguchi, Hiroshi Kitagawa

Angewandte Chemie　136　(14)　2024/02/28
Publisher: Wiley
DOI： 10.1002/ange.202400162 　

ISSN： 0044-8249

eISSN： 1521-3757

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Abstract Ladder systems situated in the dimensional crossover region have attracted much attention because their electronic states and physical properties depend strongly on the electronic correlations among the constituent legs. Generally, two‐/three‐legged transition metal‐oxide ladder compounds are studied as representative ladder systems, but two‐/three‐dimensional (2D/3D) extensions based on such ladder systems with a few numbers of legs are difficult because of the extreme synthesis conditions. Here, for the first time, we report the successful creation of a 3D extended two‐legged ladder compound, [Pt(en)(dpye)I]₂(NO₃)₄ ⋅ 2H₂O (en=ethylenediamine; dpye=1,2‐Di(4‐pyridyl)ethane), which is obtained by simple oxidative polymerization of a small Pt macrocyclic complex using elemental I₂. The unique 3D extended lattice consists of 1D mixed‐valence halogen‐bridged metal chains (⋅⋅⋅Pt−I−Pt−I⋅⋅⋅) and helically arranged macrocyclic units as the constituent legs and rungs, as confirmed by single‐crystal X‐ray diffraction. Diffuse X‐ray scattering analyses and optical measurements revealed that the out‐of‐phase mixed‐valence Pt²⁺/Pt⁴⁺ arrangement arises from the weak interchain correlation among adjacent legs. In addition, this compound shows an increase in proton conductivity by a factor of up to 1000, depending on humidity.
A Three‐Dimensionally Extended Metal–Organic Ladder Compound Exhibiting Proton Conduction Peer-reviewed

Hao Liang, Kazuya Otsubo, Yusuke Wakabayashi, Hajime Sagayama, Shogo Kawaguchi, Hiroshi Kitagawa

Angewandte Chemie International Edition　63　(14)　e202400162-1-5　2024/02/28
Publisher: Wiley
DOI： 10.1002/anie.202400162 　

ISSN： 1433-7851

eISSN： 1521-3773

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Abstract Ladder systems situated in the dimensional crossover region have attracted much attention because their electronic states and physical properties depend strongly on the electronic correlations among the constituent legs. Generally, two‐/three‐legged transition metal‐oxide ladder compounds are studied as representative ladder systems, but two‐/three‐dimensional (2D/3D) extensions based on such ladder systems with a few numbers of legs are difficult because of the extreme synthesis conditions. Here, for the first time, we report the successful creation of a 3D extended two‐legged ladder compound, [Pt(en)(dpye)I]₂(NO₃)₄ ⋅ 2H₂O (en=ethylenediamine; dpye=1,2‐Di(4‐pyridyl)ethane), which is obtained by simple oxidative polymerization of a small Pt macrocyclic complex using elemental I₂. The unique 3D extended lattice consists of 1D mixed‐valence halogen‐bridged metal chains (⋅⋅⋅Pt−I−Pt−I⋅⋅⋅) and helically arranged macrocyclic units as the constituent legs and rungs, as confirmed by single‐crystal X‐ray diffraction. Diffuse X‐ray scattering analyses and optical measurements revealed that the out‐of‐phase mixed‐valence Pt²⁺/Pt⁴⁺ arrangement arises from the weak interchain correlation among adjacent legs. In addition, this compound shows an increase in proton conductivity by a factor of up to 1000, depending on humidity.
Quantitative measurement of structural fluctuation at LaNiO3/LaAlO3 interfaces as a function of thickness Peer-reviewed

Kazuki Nagai, Masato Anada, Kazuhiro Kowa, Miho Kitamura, Hiroshi Kumigashira, Hiroo Tajiri, Yusuke Wakabayashi

Physical Review Materials　7　043604-1-9　2023/04/26

DOI： 10.1103/PhysRevMaterials.7.043604 　
Light-induced magnetization driven by interorbital charge motion in the spin-orbit assisted Mott insulator α−RuCl3

T. Amano, Y. Kawakami, H. Itoh, K. Konno, Y. Hasegawa, T. Aoyama, Y. Imai, K. Ohgushi, Y. Takeuchi, Y. Wakabayashi, K. Goto, Y. Nakamura, H. Kishida, K. Yonemitsu, S. Iwai

Physical Review Research　4　(3)　2022/08/19
Publisher: American Physical Society (APS)
DOI： 10.1103/PhysRevResearch.4.L032032 　

eISSN： 2643-1564
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
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-022-04933-5 　

ISSN： 2045-2322

eISSN： 2045-2322
Phonon dispersion of the organic semiconductor rubrene

Takada, K., Yoshimi, K., Tsutsui, S., Kimura, K., Hayashi, K., Hamada, I., Yanagisawa, S., Kasuya, N., Watanabe, S., Takeya, J., Wakabayashi, Y.

Physical Review B　105　(20)　2022
Publisher: American Physical Society (APS)
DOI： 10.1103/PhysRevB.105.205205 　

ISSN： 2469-9969 2469-9950

eISSN： 2469-9969
Local polarization and valence distribution in LaNiO3 / LaMnO3 heterostructures

Masato Anada, Satoshi Sakaguchi, Kazuki Nagai, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Yusuke Wakabayashi

Physical Review B　104　(8)　2021/08/09

DOI： 10.1103/PhysRevB.104.085111 　

ISSN： 2469-9950

eISSN： 2469-9969
Spin reorientation in tetragonally distorted spinel oxide NiCo2O4 epitaxial films

Hiroki Koizumi, Ikumi Suzuki, Daisuke Kan, Jun-ichiro Inoue, Yusuke Wakabayashi, Yuichi Shimakawa, Hideto Yanagihara

Physical Review B　2021/07/20

DOI： 10.1103/PhysRevB.104.014422 　
Erratum: Robust surface structure analysis with reliable uncertainty estimation using the exchange Monte Carlo method. Corrigendum (J. Appl. Cryst. (2020) 53 (387–392) DOI: 10.1107/S1600576720001314)

Kazuki, N., Anada, M., Ohno, Y.N., Okadae, M., Wakabayashi, Y.

Journal of Applied Crystallography　54　1023-1023　2021

DOI： 10.1107/S1600576721004520 　

ISSN： 1600-5767 0021-8898
Metallic ground states of undoped Ti2O3 films induced by elongated c-axis lattice constant

K. Yoshimatsu, N. Hasegawa, Y. Nambu, Y. Ishii, Y. Wakabayashi, H. Kumigashira

Scientific Reports　10　(1)　2020/12
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-020-79182-5 　

eISSN： 2045-2322
Multiple magnetic order parameters coexisting in multiferroic hexaferrites resolved by soft x rays

Hiroki Ueda, Yoshikazu Tanaka, Yusuke Wakabayashi, Junto Tsurumi, Jun Takeya, Tsuyoshi Kimura

Journal of Applied Physics　128　(17)　2020/11/07

DOI： 10.1063/5.0029010 　

ISSN： 0021-8979

eISSN： 1089-7550
Structure of quasi-free-standing graphene on the SiC (0001) surface prepared by the rapid cooling method Peer-reviewed

Tatsuya Sumi, Kazuki Nagai, Jianfeng Bao, Tomo-o Terasawa, Wataru Norimatsu, Michiko Kusunoki, Yusuke Wakabayashi

Applied Physics Letters　117　(14)　2020/10/05

DOI： 10.1063/5.0021071 　

ISSN： 0003-6951

eISSN： 1077-3118
Direct Evidence of Simultaneous Reversal of Ferrimagnetically Coupled Sm 4f and Mn 3d Angular Momenta in SmMnO3

J.-S. Jung, T. Nakamura, Y. Wakabayashi, T. Kimura

Journal of the Korean Physical Society　76　(10)　904-910　2020/05
Publisher: Korean Physical Society
DOI： 10.3938/jkps.76.904 　

ISSN： 0374-4884

eISSN： 1976-8524
Robust surface structure analysis with reliable uncertainty estimation using the exchange Monte Carlo method International-journal Peer-reviewed

Nagai, K., Anada, M., Nakanishi-Ohno, Y., Okada, M., Wakabayashi, Y.

Journal of Applied Crystallography　53　387-392　2020/04

DOI： 10.1107/S1600576720001314 　

ISSN： 1600-5767 0021-8898
Tuning of ferrimagnetism and perpendicular magnetic anisotropy in NiCo2O4 epitaxial films by the cation distribution Peer-reviewed

Yufan Shen, Daisuke Kan, Zhenhong Tan, Yusuke Wakabayashi, Yuichi Shimakawa

Physical Review B　2020/03/11

DOI： 10.1103/PhysRevB.101.094412 　
Early stages of iron anodic oxidation: Defective growth and density increase of oxide layer Peer-reviewed

Hiromasa Fujii, Yusuke Wakabayashi, Takashi Doi

Physical Review Materials　2020/03/03

DOI： 10.1103/PhysRevMaterials.4.033401 　
Sub-molecular structural relaxation at a physisorbed interface with monolayer organic single-crystal semiconductors Peer-reviewed

Yamamura, A., Fujii, H., Ogasawara, H., Nordlund, D., Takahashi, O., Kishi, Y., Ishii, H., Kobayashi, N., Niitsu, N., Blülle, B., Okamoto, T., Wakabayashi, Y., Watanabe, S., Takeya, J.

Communications Physics　3　(1)　2020/01/23

DOI： 10.1038/s42005-020-0285-7 　
Kinetics of iron passivation studied by sub-second resolution realtime X-ray reflectivity technique Peer-reviewed

Fujii, H., Wakabayashi, Y., Doi, T.

Journal of the Electrochemical Society　166　(8)　E212-E216　2019

DOI： 10.1149/2.0161908jes 　

ISSN： 1945-7111 0013-4651
Insights into magnetoelectric coupling mechanism of the room-temperature multiferroic S r3 C o2 F e24 O41 from domain observation Peer-reviewed

Ueda, H., Tanaka, Y., Wakabayashi, Y., Kimura, T.

Physical Review B　100　(9)　2019

DOI： 10.1103/PhysRevB.100.094444 　
Correlations between oxygen octahedral distortions and magnetic and transport properties in strained La0.5 Sr0.5Co O3 thin films Peer-reviewed

Heo, Y., Kan, D., Anada, M., Wakabayashi, Y., Tajiri, H., Shimakawa, Y.

Physical Review B　99　(17)　2019

DOI： 10.1103/PhysRevB.99.174420 　
Surface/interface holography

Wolfgang Voegeli, Yusuke Wakabayashi

3d Local Structure And Functionality Design Of Materials　57-73　2018/12/21
Publisher: World Scientific Publishing Co.
DOI： 10.1142/9789813273672_0004 　
Surface Structure of Organic Semiconductor [n]Phenacene Single Crystals Peer-reviewed

Yusuke Wakabayashi, Masanari Nakamura, Kaori Sasaki, Takahiro Maeda, Yuutaro Kishi, Hiroyuki Ishii, Nobuhiko Kobayashi, Susumu Yanagisawa, Yuma Shimo, Yoshihiro Kubozono

Journal of the American Chemical Society　140　(43)　14046-14049　2018/10/31
Publisher: American Chemical Society ({ACS})
DOI： 10.1021/jacs.8b08811 　
Spin-orbital entangled liquid state in the copper oxide Ba<inf>3</inf>CuSb<inf>2</inf>O<inf>9</inf> Peer-reviewed

Man, H., Halim, M., Sawa, H., Hagiwara, M., Wakabayashi, Y., Nakatsuji, S.

Journal of Physics Condensed Matter　30　(44)　2018

DOI： 10.1088/1361-648X/aae106 　
Observation of collinear antiferromagnetic domains making use of the circular dichroic charge-magnetic interference effect of resonant x-ray diffraction Peer-reviewed

Ueda, H., Tanaka, Y., Wakabayashi, Y., Kimura, T.

Physical Review B　98　(13)　2018

DOI： 10.1103/PhysRevB.98.134415 　
Structural Switching of Self-Assembled Monolayer by External Electric Field Peer-reviewed

Fujii, Hiromasa, Sasaki, Kaori, Wakabayashi, Yusuke, Tajiri, Hiroo, Miwa, Kazumoto, Ono, Shimpei, Nouchi, Ryo

E-Journal of Surface Science and Nanotechnology　16　2018

DOI： 10.1380/ejssnt.2018.76 　
Spatial coherence of the insulating phase in quasi-two-dimensional LaNiO3 films Peer-reviewed

Anada, Masato, Kowa, Kazuhiro, Maeda, Hiroki, Sakai, Enju, Kitamura, Miho, Kumigashira, Hiroshi, Sakata, Osami, Nakanishi-Ohno, Yoshinori, Okada, Masato, Kimura, Tsuyoshi, Wakabayashi, Yusuke

Physical Review B　98　(1)　2018

DOI： 10.1103/PhysRevB.98.014105 　
Soft x-ray resonant diffraction study of magnetic structure in magnetoelectric Y-type hexaferrite Peer-reviewed

Ueda, H., Tanaka, Y., Wakabayashi, Y., Kimura, T.

Physica B-Condensed Matter　536　118-121　2018

DOI： 10.1016/j.physb.2017.09.061 　
Oxygen octahedral distortions in compressively strained SrRuO3 epitaxial thin films Peer-reviewed

Kan, Daisuke, Anada, Masato, Wakabayashi, Yusuke, Tajiri, Hiroo, Shimakawa, Yuichi

Journal of Applied Physics　123　(23)　2018

DOI： 10.1063/1.5036748 　
Observation of Structure of Surfaces and Interfaces by Synchrotron X-ray Diffraction: Atomic-Scale Imaging and Time-Resolved Measurements Peer-reviewed

Wakabayashi, Yusuke, Shirasawa, Tetsuroh, Voegeli, Wolfgang, Takahashi, Toshio

Journal of the Physical Society of Japan　87　(6)　2018

DOI： 10.7566/JPSJ.87.061010 　
Nondestructive Method for the Determination of the Electric Polarization Orientation in Thin Films: Illustration on Gallium Ferrite Thin Films Peer-reviewed

Lefevre, Chistophe, Demchenko, Anna, Bouillet, Corinne, Luysberg, Martina, Devaux, Xavier, Roulland, Francois, Versini, Gilles, Barre, Sophie, Wakabayashi, Yusuke, Boudet, Nathalie, Leuvrey, Cedric, Acosta, Manuel, Meny, Christian, Martin, Elodie, Grenier, Stephane, Favre-Nicolin, Vincent, Viart, Nathalie

Small Methods　1　(12)　2017

DOI： 10.1002/smtd.201700258 　
Bayesian inference of metal oxide ultrathin film structure based on crystal truncation rod measurements Peer-reviewed

Anada, Masato, Nakanishi-Ohno, Yoshinori, Okada, Masato, Kimura, Tsuyoshi, Wakabayashi, Yusuke

Journal of Applied Crystallography　50　1611-1616　2017

DOI： 10.1107/S1600576717013292 　
The first study of antiferromagnetic eosphorite-childrenite series (Mn1-xFex)AlP(OH)(2)H2O (x=0.5) Peer-reviewed

Behal, D., Roeska, B., Park, S. -H., Pedersen, B., Benka, G., Pfleiderer, Ch., Wakabayashi, Y., Kimura, T.

Journal of Magnetism and Magnetic Materials　428　17-27　2017

DOI： 10.1016/j.jmmm.2016.12.013 　

ISSN： 0304-8853
Structural deformation of the S=1 kagome-lattice compound KV3Ge2O9 Peer-reviewed

Takagi, Eigo, Aoyama, Takuya, Hara, Shigeo, Sato, Hirohiko, Kimura, Tsuyoshi, Wakabayashi, Yusuke

Physical Review B　95　(10)　2017

DOI： 10.1103/PhysRevB.95.104416 　

ISSN： 2469-9950
Chemical and orbital fluctuations in Ba₃CuSb₂O₉ Peer-reviewed

Y. Wakabayashi, D. Nakajima, Y. Ishiguro, K. Kimura, T. Kimura, S. Tsutsui, A. Q. R. Baron, K. Hayashi, N. Happo, S. Hosokawa, K. Ohwada, S. Nakatsuji

Physical Review B　93　245117-1-13　2016/06/07

DOI： 10.1103/PhysRevB.93.245117 　

ISSN： 2469-9969
19pAQ-4 Magnetic structure and effect of external field on its complex domain structure in magnetoelectric (Ba,Sr)_2(Co,Zn)_2(Fe,Al)_<12>O_<22>

Ueda H., Tanaka Y., Oura M., Ohta K., Wakabayashi Y., Kimura T.

Meeting Abstracts of the Physical Society of Japan　71　2672-2672　2016
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.71.1.0_2672 　

ISSN： 2189-079X
21aBB-10 X-ray reflectometry study of a self-assembled monolayer in electric fields

Sasaki K., Nouchi R., Tajiri H., Miwa K., Ono S., Kimura T., Wakabayashi Y.

Meeting Abstracts of the Physical Society of Japan　71　1890-1890　2016
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.71.1.0_1890 　

ISSN： 2189-079X
Structure model construction of perovskite oxide interfaces based on reverse Monte-Carlo analysis of CTR scattering

Anada Masato, Nakanishi-Ohno Yoshinori, Okada Masato, Kimura Tsuyoshi, Wakabayashi Yusuke

Meeting Abstracts of the Physical Society of Japan　71　2502-2502　2016
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.71.2.0_2502 　
Quadrupole moments in chiral material DyFe3(BO3)(4) observed by resonant x-ray diffraction Peer-reviewed

Nakajima, Hiroshi, Usui, Tomoyasu, Joly, Yves, Suzuki, Motohiro, Wakabayashi, Yusuke, Kimura, Tsuyoshi, Tanaka, Yoshikazu

Physical Review B　93　(14)　2016

DOI： 10.1103/PhysRevB.93.144116 　

ISSN： 2469-9950
Microscopic Observation of Degradation of LaNiO3 Ultrathin Films Caused by Air Exposure Peer-reviewed

Wakabayashi, Yusuke, Maeda, Hiroki, Kimura, Tsuyoshi, Sakata, Osami, Sakai, Enju, Kumigashira, Hiroshi

E-Journal of Surface Science and Nanotechnology　14　14-16　2016

DOI： 10.1380/ejssnt.2016.14 　

ISSN： 1348-0391
Magnetic structure and effect of magnetic field on its domain structure in magnetoelectric Ba1.3Sr0.7CoZnFe11AlO22 Peer-reviewed

Ueda, H., Tanaka, Y., Nakajima, H., Mori, S., Ohta, K., Haruki, K., Hirose, S., Wakabayashi, Y., Kimura, T.

Applied Physics Letters　109　(18)　182902　2016

DOI： 10.1063/1.4966623 　
Interfacially engineered oxygen octahedral rotations and their impact on strain relief in coherently grown SrRuO3 films Peer-reviewed

Kan, Daisuke, Wakabayashi, Yusuke, Tajiri, Hiroo, Shimakawa, Yuichi

Physical Review B　94　(2)　2016

DOI： 10.1103/PhysRevB.94.024112 　

ISSN： 2469-9950
Dynamical Response of the Electric Double Layer Structure of the DEME-TFSI Ionic Liquid to Potential Changes Observed by Time-Resolved X-ray Reflectivity Peer-reviewed

Voegeli, Wolfgang, Arakawa, Etsuo, Matsushita, Tadashi, Sakata, Osami, Wakabayashi, Yusuke

Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics　230　(4)　577-585　2016

DOI： 10.1515/zpch-2015-0669 　

ISSN： 0942-9352
Direct Estimation of the Surface Location of Immobilized Functional Groups for Concerted Catalysis Using a Probe Molecule Peer-reviewed

Noda, Hiroto, Motokura, Ken, Wakabayashi, Yusuke, Sasaki, Kaori, Tajiri, Hiroo, Miyaji, Akimitsu, Yamaguchi, Sho, Baba, Toshihide

Chemistry-a European Journal　22　(15)　5113-5117　2016

DOI： 10.1002/chem.201600263 　

ISSN： 0947-6539
Determination of the cationic distribution in oxidic thin films by resonant X-ray diffraction: the magnetoelectric compound Ga2-xFexO3 Peer-reviewed

Lefevre, Christophe, Thomasson, Alexandre, Roulland, Francois, Favre-Nicolin, Vincent, Joly, Yves, Wakabayashi, Yusuke, Versini, Gilles, Barre, Sophie, Leuvrey, Cedric, Demchenko, Anna, Boudet, Nathalie, Viart, Nathalie

Journal of Applied Crystallography　49　1308-1314　2016

DOI： 10.1107/S1600576716010001 　

ISSN： 1600-5767
Confirmation of no Structural and Chemical Changes in Curie Temperature Variable Co Ultrathin Films by Electric Field Peer-reviewed

Wakabayashi, Yusuke, Fujii, Hiromasa, Kimura, Tsuyoshi, Sakata, Osami, Tajiri, Hiroo, Koyama, Tomohiro, Chiba, Daichi

Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics　230　(4)　569-575　2016

DOI： 10.1515/zpch-2015-0648 　

ISSN： 0942-9352
Chemical and orbital fluctuations in Ba3CuSb2O9 Peer-reviewed

Wakabayashi, Yusuke, Nakajima, Daisuke, Ishiguro, Yuki, Kimura, Kenta, Kimura, Tsuyoshi, Tsutsui, Satoshi, Baron, Alfred Q. R., Hayashi, Kouichi, Happo, Naohisa, Hosokawa, Shinya, Ohwada, Kenji, Nakatsuji, Satoru

Physical Review B　93　(24)　2016

DOI： 10.1103/PhysRevB.93.245117 　

ISSN： 2469-9950
19aPS-59 Low-temperature structure of honeycomb Ising cobaltate Ba_3Co_2O_6(CO_3)_<0.7>

Anada Masato, Shimizu Yasuhiro, Kobayashi Yoshiaki, Itoh Masayuki, Kimura Tsuyoshi, Wakabayashi Yusuke

Meeting Abstracts of the Physical Society of Japan　70　2151-2151　2015
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.70.2.0_2151 　

ISSN： 2189-079X
22pCJ-3 X-ray CTR study of anomalous properties exhibited by transition metal oxide surfaces

Wakabayashi Y.

Meeting Abstracts of the Physical Society of Japan　70　2745-2746　2015
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.70.1.0_2745 　

ISSN： 2189-079X
21aCP-4 Excitation-photon-energy selectivity of photoconversions in halogen-bridged Pd-chain compounds : Mott insulator to metal or charge-density-wave state

Matsuzaki H., Terashige T., Miyamoto T., Okamoto H., Kumagai S., Takaishi S., Yamashita M., Iwano K., Takahashi R., Wakabayashi Y.

Meeting Abstracts of the Physical Society of Japan　70　1433-1433　2015
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.70.1.0_1433 　

ISSN： 2189-079X
Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal Peer-reviewed

Katayama, Naoyuki, Kimura, Kenta, Han, Yibo, Nasu, Joji, Drichko, Natalia, Nakanishi, Yoshiki, Halim, Mario, Ishiguro, Yuki, Satake, Ryuta, Nishibori, Eiji, Yoshizawa, Masahito, Nakano, Takehito, Nozue, Yasuo, Wakabayashi, Yusuke, Ishihara, Sumio, Hagiwara, Masayuki, Sawa, Hiroshi, Nakatsuji, Satoru

Proceedings of the National Academy of Sciences of the United States of America　112　(30)　9305-9309　2015

DOI： 10.1073/pnas.1508941112 　

ISSN： 0027-8424
The effect of field cooling on a spin-chiral domain structure in a magnetoelectric helimagnet Ba0.5Sr1.5Zn2Fe12O22 Peer-reviewed

Hiraoka, Y., Tanaka, Y., Oura, M., Wakabayashi, Y., Kimura, T.

Journal of Magnetism and Magnetic Materials　384　160-165　2015

DOI： 10.1016/j.jmmm.2015.02.028 　
Si Doping Effect on the Structure of Multiferroic Mn2Ge1-xSixO4 Peer-reviewed

Hiromasa Fujii, Takashi Honda, Tsuyoshi Kimura, Yusuke Wakabayashi

JPS Conf. Proc. 1, 012085 (2014)　2014
Publisher: Journal of the Physical Society of Japan
DOI： 10.7566/JPSCP.1.012085 　
Pressure effect on magnetism and multiferroicity in Mn2GeO4 Peer-reviewed

Honda, T., Aoyama, T., White, J. S., Straessle, Th, Keller, L., Kenzelmann, M., Honda, F., Miyake, A., Shimizu, K., Wakabayashi, Y., Kimura, T.

Physical Review B　89　(10)　104405　2014

DOI： 10.1103/PhysRevB.89.104405 　
Large surface relaxation in the organic semiconductor tetracene Peer-reviewed

Morisaki, Hazuki, Koretsune, Takashi, Hotta, Chisa, Takeya, Jun, Kimura, Tsuyoshi, Wakabayashi, Yusuke

Nature Communications　5　2014

DOI： 10.1038/ncomms6400 　
Observation of quadrupole helix chirality and its domain structure in DyFe3(BO3)(4) Peer-reviewed

Usui, T., Tanaka, Y., Nakajima, H., Taguchi, M., Chainani, A., Oura, M., Shin, S., Katayama, N., Sawa, H., Wakabayashi, Y., Kimura, T.

Nature Materials　13　(6)　611-618　2014

DOI： 10.1038/NMAT3942 　
Magnetoelectric effect in FeSb2O4 single crystals Peer-reviewed

Iyama, Ayato, Wakabayashi, Yusuke, Hanasaki, Noriaki, Kimura, Tsuyoshi

Japanese Journal of Applied Physics　53　(5)　2014

DOI： 10.7567/JJAP.53.05FB02 　

ISSN： 0021-4922
Excitation-Photon-Energy Selectivity of Photoconversions in Halogen-Bridged Pd-Chain Compounds: Mott Insulator to Metal or Charge-Density-Wave State Peer-reviewed

Matsuzaki, H., Iwata, M., Miyamoto, T., Terashige, T., Iwano, K., Takaishi, S., Takamura, M., Kumagai, S., Yamashita, M., Takahashi, R., Wakabayashi, Y., Okamoto, H.

Physical Review Letters　113　(9)　2014

DOI： 10.1103/PhysRevLett.113.096403 　

ISSN： 0031-9007
Dynamical spin-orbital correlation in the frustrated magnet Ba3CuSb2O9 Peer-reviewed

Yuki Ishiguro, Kenta Kimura, Satoru Nakatsuji, Satoshi Tsutsui, Alfred Q. R. Baron, Tsuyoshi Kimura, Yusuke Wakabayashi

NATURE COMMUNICATIONS　4　2013/06

DOI： 10.1038/ncomms3022 　

ISSN： 2041-1723
Structure Analysis of Transition Metal Oxide Ultrathinfilms by Means of Surface X-ray Diffraction Technique

Wakabayashi Yusuke

Bulletin of the Japan Institute of Metals　52　(12)　554-557　2013
Publisher: The Japan Institute of Metals and Materials
DOI： 10.2320/materia.52.554 　

ISSN： 1340-2625
Picoscale electron density analysis of organic crystals Peer-reviewed

Wakabayashi, Y.

Fundamentals of Picoscience　2013
Publisher: Fundamentals of Picoscience
DOI： 10.1201/b15523 　
Refinement of Crystal Structure of a Magnetoelectric U-Type Hexaferrite Sr4Co2Fe36O60 Peer-reviewed

Honda, Takashi, Hiraoka, Yuji, Wakabayashi, Yusuke, Kimura, Tsuyoshi

Journal of the Physical Society of Japan　82　(2)　2013

DOI： 10.7566/JPSJ.82.025003 　
Valence ordering in the intermediate-valence magnet YbPd Peer-reviewed

Takahashi, Ryo, Honda, Takashi, Miyake, Atsushi, Kagayama, Tomoko, Shimizu, Katsuya, Ebihara, Takao, Kimura, Tsuyoshi, Wakabayashi, Yusuke

Physical Review B　88　(5)　54109　2013

DOI： 10.1103/PhysRevB.88.054109 　
Structural investigation of magnetocapacitive SmMnO<inf>3</inf> Peer-reviewed

Maeda, H., Ishiguro, Y., Honda, T., Jung, J.-S., Michimura, S., Inami, T., Kimura, T., Wakabayashi, Y.

Journal of the Ceramic Society of Japan　121　(1411)　265-267　2013

DOI： 10.2109/jcersj2.121.265 　

ISSN： 1882-0743
Smallest optical gap for quasi-one-dimensional iodo-bridged platinum compounds Peer-reviewed

Shin, Minseob, Takaishi, Shinya, Kumagai, Shohei, Ueda, Yutaro, Breedlove, Brian K., Matsuzaki, Hiroyuki, Okamoto, Hiroshi, Wakabayashi, Yusuke, Yamashita, Masahiro

Dalton Transactions　42　(18)　6277-6280　2013

DOI： 10.1039/c3dt32890b 　

ISSN： 1477-9226
Interplay between Charge and Magnetic Orderings in YbPd Peer-reviewed

Miyake, Atsushi, Kasano, Kazuki, Kagayama, Tomoko, Shimzu, Katsuya, Takahashi, Ryo, Wakabayashi, Yusuke, Kimura, Tsuyoshi, Ebihara, Takao

Journal of the Physical Society of Japan　82　(8)　84706　2013

DOI： 10.7566/JPSJ.82.084706 　
Structure and Magnetic Phase Diagrams of Multiferroic Mn2GeO4 Peer-reviewed

Honda, Takashi, Ishiguro, Yuki, Nakamura, Hiroyuki, Wakabayashi, Yusuke, Kimura, Tsuyoshi

Journal of the Physical Society of Japan　81　(10)　2012

DOI： 10.1143/JPSJ.81.103703 　
Lattice distortion accompanied by magnetization reversal in A-type antiferromagnetic manganites Peer-reviewed

Jung, Jong-Suck, Iyama, Ayato, Nakamura, Hiroyuki, Wakabayashi, Yusuke, Kimura, Tsuyoshi

Physical Review B　85　(17)　2012

DOI： 10.1103/PhysRevB.85.174414 　
External electric field dependence of the structure of the electric double layer at an ionic liquid/Au interface Peer-reviewed

Yamamoto, Ryosuke, Morisaki, Hazuki, Sakata, Osami, Shimotani, Hidekazu, Yuan, Hongtao, Iwasa, Yoshihiro, Kimura, Tsuyoshi, Wakabayashi, Yusuke

Applied Physics Letters　101　(5)　2012

DOI： 10.1063/1.4742920 　
REXS contribution to electronic ordering investigation in solids Peer-reviewed

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

European Physical Journal-Special Topics　208　(1)　89-98　2012

DOI： 10.1140/epjst/e2012-01609-0 　

ISSN： 1951-6355
Bottom-up realization of a porous metal-organic nanotubular assembly Peer-reviewed

Kazuya Otsubo, Yusuke Wakabayashi, Jun Ohara, Shoji Yamamoto, Hiroyuki Matsuzaki, Hiroshi Okamoto, Kiyofumi Nitta, Tomoya Uruga, Hiroshi Kitagawa

NATURE MATERIALS　10　(4)　291-295　2011/04

DOI： 10.1038/NMAT2963 　

ISSN： 1476-1122
Magnetic Ordering in Relation to the Room-Temperature Magnetoelectric Effect of Sr3Co2Fe24O41 Peer-reviewed

Minoru Soda, Taishi Ishikura, Hiroyuki Nakamura, Yusuke Wakabayashi, Tsuyoshi Kimura

PHYSICAL REVIEW LETTERS　106　(8)　2011/02

DOI： 10.1103/PhysRevLett.106.087201 　

ISSN： 0031-9007

eISSN： 1079-7114
Magnetic and magnetoelectric properties of Ba(2-x)Sr(x)Ni(2)Fe(12)O(22) single crystals with Y-type hexaferrite structure Peer-reviewed

Hiraoka, Yuji, Nakamura, Hiroyuki, Soda, Minoru, Wakabayashi, Yusuke, Kimura, Tsuyoshi

Journal of Applied Physics　110　(3)　2011

DOI： 10.1063/1.3622332 　

ISSN： 0021-8979
Magnetism and magnetoelectricity of a U-type hexaferrite Sr(4)Co(2)Fe(36)O(60) Peer-reviewed

Okumura, K., Ishikura, T., Soda, M., Asaka, T., Nakamura, H., Wakabayashi, Y., Kimura, T.

Applied Physics Letters　98　(21)　2011

DOI： 10.1063/1.3593371 　

ISSN： 0003-6951
Surface melting of electronic order in La0.5Sr1.5MnO4 Peer-reviewed

Wilkins, S. B., Liu, X., Wakabayashi, Y., Kim, J. -W., Ryan, P. J., Zheng, H., Mitchell, J. F., Hill, J. P.

Physical Review B　84　(16)　2011

DOI： 10.1103/PhysRevB.84.165103 　
Interfacial Structure of Manganite Superlattice Peer-reviewed

Yamasaki, Yoshihiro, Okuyama, Daisuke, Nakamura, Masao, Arima, Taka-hisa, Kawasaki, Masashi, Tokura, Yoshinori, Kimura, Tsuyoshi, Wakabayashi, Yusuke

Journal of the Physical Society of Japan　80　(7)　73601　2011

DOI： 10.1143/JPSJ.80.073601 　
Superparamagnetism Induced by Polar Nanoregions in Relaxor Ferroelectric (1-x)BiFeO3-xBaTiO(3) Peer-reviewed

Soda, M, Matsuura, M, Wakabayashi, Y, Hirota, K

Journal of the Physical Society of Japan　80　(4)　43705　2011

DOI： 10.1143/JPSJ.80.043705 　
Structural Comparison of n-Type and p-Type LaAlO(3)/SrTiO(3) Interfaces Peer-reviewed

Yamamoto, Ryosuke, Bell, Christopher, Hikita, Yasuyuki, Hwang, Harold Y., Nakamura, Hiroyuki, Kimura, Tsuyoshi, Wakabayashi, Yusuke

Physical Review Letters　107　(3)　2011

DOI： 10.1103/PhysRevLett.107.036104 　
Spin-chiral domains in Ba(0.5)Sr(1.5)Zn(2)Fe(12)O(22) observed by scanning resonant x-ray microdiffraction Peer-reviewed

Hiraoka, Y., Tanaka, Y., Kojima, T., Takata, Y., Oura, M., Senba, Y., Ohashi, H., Wakabayashi, Y., Shin, S., Kimura, T.

Physical Review B　84　(6)　2011

DOI： 10.1103/PhysRevB.84.064418 　
Near-surface structural study of transition metal oxides to understand their electronic properties Peer-reviewed

Wakabayashi, Yusuke

Journal of Physics-Condensed Matter　23　(48)　2011

DOI： 10.1088/0953-8984/23/48/483001 　

ISSN： 0953-8984
Magnetism in Triangular Lattice System LuFeCoO(4) having Relaxor Property Peer-reviewed

Minoru Soda, Takuya Aoyama, Yusuke Wakabayashi, Kazuma Hirota

INTERNATIONAL CONFERENCE ON FRUSTRATION IN CONDENSED MATTER (ICFCM)　320　2011

DOI： 10.1088/1742-6596/320/1/012084 　

ISSN： 1742-6588
Interface structure of the rubrene crystal field effect transistor Peer-reviewed

Wakabayashi, Yusuke, Takeya, Jun, Kimura, Tsuyoshi

Journal of Applied Physics　110　(10)　2011

DOI： 10.1063/1.3661523 　

ISSN： 0021-8979
Growth Temperature Dependence of the LaAlO(3)/SrTiO(3) Interfacial Structure Peer-reviewed

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

INTERNATIONAL CONFERENCE ON FRUSTRATION IN CONDENSED MATTER (ICFCM)　320　2011

DOI： 10.1088/1742-6596/320/1/012074 　

ISSN： 1742-6588
Antiferroelectric Lattice Distortion Induced by Ferro-quadrupolar Order in DyVO_4

KISHIMOTO Kazumasa, WAKABAYASHI Yusuke, KIMURA Tsuyoshi

X-RAYS　52　(5)　239-245　2010/10/31
Publisher: The Crystallographic Society of Japan
DOI： 10.5940/jcrsj.52.239 　

ISSN： 0369-4585

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The term "multiferroics" was originally coined for materials in which multiple ferroic orders, such as ferromagnetic, ferroelectric, and ferroelastic orders, coexist simultaneously. In recent years, some classes of multiferroics where magnetic and ferroelectric orders coexist have been attracting much attention from both fundamental and technological points of view because the coupling between these two ferroic orders produces intriguing magnetoelectric and magnetodielectric phenomena. Here, we focus on a rare-earth zircon, DyVO₄, which exhibits distinct magnetodielectric phenomena owing to another type of ferroic coupling. This compound combines two ferroic orders: "antiferroelectric order" and "quadrupolar order". We discuss the effect of quadrupolar order (Jahn-Teller effect) on magnetic and dielectric properties in DyVO₄ in which the quadrupolar order of Dy 4f electrons induces the antiferroelectric order related to lattice distortion aroung V sites.
Sub-Å resolution electron density analysis of the surface of organic rubrene crystals Peer-reviewed

Yusuke Wakabayashi, Jun Takeya, Tsuyoshi Kimura

Physical Review Letters　104　(6)　2010/02/12

DOI： 10.1103/PhysRevLett.104.066103 　

ISSN： 0031-9007

eISSN： 1079-7114
Magnetocapacitive effects in the Neel N-type ferrimagnet SmMnO(3) Peer-reviewed

Jung, Jong-Suck, Iyama, Ayato, Nakamura, Hiroyuki, Mizumaki, Masaichiro, Kawamura, Naomi, Wakabayashi, Yusuke, Kimura, Tsuyoshi

Physical Review B　82　(21)　2010

DOI： 10.1103/PhysRevB.82.212403 　
Antiferroelectric lattice distortion induced by ferroquadrupolar order in DyVO4 Peer-reviewed

Kishimoto, K, Ishikura, T, Nakamura, H, Wakabayashi, Y, Kimura, T

Physical Review B　82　(1)　2010

DOI： 10.1103/PhysRevB.82.012103 　
Magnetically Tunable Metal-Insulator Superlattices Peer-reviewed

Nakamura, Masao, Okuyama, Daisuke, Lee, Jong Seok, Arima, Taka-hisa, Wakabayashi, Yusuke, Kumai, Reiji, Kawasaki, Masashi, Tokura, Yoshinori

Advanced Materials　22　(4)　2010

DOI： 10.1002/adma.200902734 　
Little volume change in orbital ordering transition in manganite thin films Peer-reviewed

Wakabayashi, Yusuke, Sawa, Hiroshi, Takubo, Naoko, Nakamura, Masao, Ogimoto, Yasushi, Miyano, Kenjiro, Bruckel, T, Schweika, W, Tonnerre, JM

Polarized Neutrons and Synchrotron X-Rays For Magnetism Conference 2009　211　2010

DOI： 10.1088/1742-6596/211/1/012004 　
Interface structure of an epitaxial iron silicide on Si(111) studied with X-Ray diffraction Peer-reviewed

Tetsuroh Shirasawa, Kouji Sekiguchi, Yusaku Iwasawa, Wolfgang Voegeli, Toshio Takahashi, Ken Hattori, Azusa N. Hattori, Hiroshi Daimon, Yusuke Wakabayashi

e-Journal of Surface Science and Nanotechnology　7　513-517　2009/04/11

DOI： 10.1380/ejssnt.2009.513 　

ISSN： 1348-0391

eISSN： 1348-0391
Crystal Structure and Valence Distribution of [(LaMnO3)(m)(SrMnO3)(m)](n) Artificial Superlattices Peer-reviewed

Hironori Nakao, Jun Nishimura, Youichi Murakami, Akira Ohtomo, Tomoteru Fukumura, Masashi Kawasaki, Takashi Koida, Yusuke Wakabayashi, Hiroshi Sawa

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　78　(2)　2009/02

DOI： 10.1143/JPSJ.78.024602 　

ISSN： 0031-9015
Lattice Distortion Coupled with Magnetic Ordering in a Triangular Lattice Antiferromagnet CuCrO(2) Peer-reviewed

Kimura, Kenta, Otani, Tsuyoshi, Nakamura, Hiroyuki, Wakabayashi, Yusuke, Kimura, Tsuyoshi

Journal of the Physical Society of Japan　78　(11)　113710　2009

DOI： 10.1143/JPSJ.78.113710 　
Anomalous induction of ferroelectric polarization by magnetization reversal in the phase-separated multiferroic manganite Eu(0.8)Y(0.2)MnO(3) Peer-reviewed

Danjoh, S., Jung, J. -S., Nakamura, H., Wakabayashi, Y., Kimura, T.

Physical Review B　80　(18)　2009

DOI： 10.1103/PhysRevB.80.180408 　
Epitaxial-strain effect on charge/orbital order in Pr0.5Ca0.5MnO3 films Peer-reviewed

Okuyama, D, Nakamura, M, Wakabayashi, Y, Itoh, H, Kumai, R, Yamada, H, Taguchi, Y, Arima, T, Kawasaki, M, Tokura, Y

Applied Physics Letters　95　(15)　2009

DOI： 10.1063/1.3246158 　
Size of orbital-ordering domain controlled by the itinerancy of the 3d electrons in a manganite thin film Peer-reviewed

Wakabayashi, Y, Sagayama, H, Arima, T, Nakamura, M, Ogimoto, Y, Kubo, Y, Miyano, K, Sawa, H

Physical Review B　79　(22)　2009

DOI： 10.1103/PhysRevB.79.220403 　
Structural study on Pr-0.55(Ca1-ySry)(0.45)MnO3 thin films on perovskite (011) substrate Peer-reviewed

Wakabayashi, Y, Takubo, N, Miyano, K, Sawa, H

European Physical Journal-Special Topics　167　67-71　2009

DOI： 10.1140/epjst/e2009-00938-3 　

ISSN： 1951-6355
Structure and Magnetic Properties of γ-Fe_2O_3 Epitaxial Thin Films Grown by Pure-Ozone-Assisted MBE Technique

YANAGIHARA,H, WAKABAYASHI,Y

Magnetics Japan　3　(4)　180-186　2008/04
Publisher: 日本磁気学会
ISSN： 1880-7208
Orbital ordering structures in (Nd,Pr)(0.5)Sr0.5MnO3 manganite thin films on perovskite (011) substrates Peer-reviewed

Wakabayashi, Y, Bizen, D, Kubo, Y, Nakao, H, Murakami, Y, Nakamura, M, Ogimoto, Y, Miyano, K, Sawa, H

Journal of the Physical Society of Japan　77　(1)　2008

DOI： 10.1143/JPSJ.77.014712 　
Lattice modulation in YMn2O5 and TbMn2O5 studied by using synchrotron radiation X-rays Peer-reviewed

Y. Noda, H. Kimura, Y. Kamada, Y. Ishikawa, S. Kobayashi, Y. Wakabayashi, H. Sawa, N. Ikeda, K. Kohn

JOURNAL OF THE KOREAN PHYSICAL SOCIETY　51　(2)　828-831　2007/08

ISSN： 0374-4884
Relation between superconductivity and superstructure in Ce2RhIn8 Peer-reviewed

Masahito Koeda, Tetsuya Fujiwara, Masato Hedo, Yoshiya Uwatoko, Hajime Sagayama, Yusuke Wakabayashi, Hiroshi Sawa

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　310　(2)　E31-E32　2007/03

DOI： 10.1016/j.jmmm.2006.10.073 　

ISSN： 0304-8853
Charge ordering in alpha-(BEDT-TTF)(2)I-3 by synchrotron x-ray diffraction Peer-reviewed

Kakiuchi, T, Wakabayashi, Y, Sawa, H, Takahashi, T, Nakamura, T

Journal of the Physical Society of Japan　76　(11)　2007

DOI： 10.1143/JPSJ.76.113702 　
Wigner crystallization in (DI-DCNQI)(2)Ag detected by synchrotron radiation X-ray diffraction Peer-reviewed

Kakiuchi, T, Wakabayashi, Y, Sawa, H, Itou, T, Kanoda, K

Physical Review Letters　98　(6)　2007

DOI： 10.1103/PhysRevLett.98.066402 　
Surface effects on the orbital order in the single-layered manganite La0.5Sr1.5MnO4 Peer-reviewed

Wakabayashi, Y, Upton, MH, Grenier, S, Hill, JP, Nelson, CS, Kim, JW, Ryan, PJ, Goldman, AI, Zheng, H, Mitchell, JF

Nature Materials　6　(12)　2007

DOI： 10.1038/nmat2061 　
Lattice modulation in YMn2O5 and TbMn2O5 studied by using synchrotron radiation X-rays Peer-reviewed

Noda, Y., Kimura, H., Kamada, Y., Ishikawa, Y., Kobayashi, S., Wakabayashi, Y., Sawa, H., Ikeda, N., Kohn, K.

Journal of the Korean Physical Society　51　(2)　828-831　2007
X-ray investigation of cleavage plane of single layered manganite La0.5Sr1.5MnO4 Peer-reviewed

Wakabayashi, Y, Upton, MH, Grenier, S, Hill, JP, Nelson, CS, Zheng, H, Mitchell, JF

Thin Solid Films　515　(14)　5741-5743　2007

DOI： 10.1016/j.tsf.2006.12.124 　

ISSN： 0040-6090

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The top layer of a cleaved surface of the single layered manganite La0.5Sr1.5MnO4 is measured with crystal truncation rod scattering. Knowledge of the surface structure of strongly correlated electron systems is needed for nano-science and device application of such systems. The result shows that the cleaved surface is terminated by La/Sr layer and has little surface roughness. ? 2006 Elsevier B.V. All rights reserved.
Orbital ordering and the dilute effect in copper fluoride Peer-reviewed

Tatami, N., Ando, Y., Niioka, S., Kira, H., Onodera, M., Nakao, H., Iwasa, K., Murakami, Y., Kakiuchi, T., Wakabayashi, Y., Sawa, H., Itoh, S.

Journal of Magnetism and Magnetic Materials　310　(2)　787-789　2007

DOI： 10.1016/j.jmmm.2006.10.181 　

ISSN： 0304-8853
Orbital ordered structure of a manganite thin film observed by K-edge resonant X-ray scattering Peer-reviewed

Y. Wakabayashi, D. Bizen, H. Nakao, Y. Murakami, M. Nakamura, Y. Ogimoto, K. Miyano, H. Sawa

SYNCHROTRON RADIATION INSTRUMENTATION, PTS 1 AND 2　879　1711-+　2007

DOI： 10.1063/1.2436399 　

ISSN： 0094-243X
Direct observation of a gas molecule (H-2, Ar) swallowed by C-60 Peer-reviewed

H. Sawa, T. Kakiuchi, Y. Wakabayashi, Y. Murata, M. Murata, K. Komatsu, K. Yakigaya, H. Takagi, N. Dragoe

SYNCHROTRON RADIATION INSTRUMENTATION, PTS 1 AND 2　879　1419-+　2007

DOI： 10.1063/1.2436331 　

ISSN： 0094-243X
Halogen-Bridged Two-Leg Ladder PtII-PtIV Mixed-Valence Complexes: Syntheses, Structures and Optical Peer-reviewed

M. Yamashita, D. Kawakami, S. Matsunaga, S. Takaishi, T. Kajiwara, H. Miyasaka, K. Sugiura, H. Matsuzaki, H. Kishida, H. Okamoto, Y. Wakabayashi, H. Sawa

Angew. Chem. Int. Ed.,　45　7214-7217　2006/04
Two types of multistack structures in MgB2-type superconductor CaAlSi Peer-reviewed

H Sagayama, Y Wakabayashi, H Sawa, T Kamiyama, A Hoshikawa, S Harjo, K Uozato, AK Ghosh, M Tokunaga, T Tamegai

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　75　(4)　2006/04

DOI： 10.1143/JPSJ.75.043713 　

ISSN： 0031-9015
Iron vacancy ordered gamma-Fe2O3(001) epitaxial films: The crystal structure and electrical resistivity Peer-reviewed

Yanagihara, H, Hasegawa, M, Kita, E, Wakabayashi, Y, Sawa, H, Siratori, K

Journal of the Physical Society of Japan　75　(5)　2006

DOI： 10.1143/JPSJ.75.054708 　
Dynamical valence fluctuation at the charge-density-wave phase boundary in iodide-bridged Pt compound [Pt(chxn)(2)I]I-2 Peer-reviewed

Takaishi, S, Kawakami, D, Yamashita, M, Sasaki, M, Kajiwara, T, Miyasaka, H, Sugiura, K, Wakabayashi, Y, Sawa, H, Matsuzaki, H, Kishida, H, Okamoto, H, Watanabe, H, Tanaka, H, Marumoto, K, Ito, H, Kuroda, S

Journal of the American Chemical Society　128　(19)　2006

DOI： 10.1021/ja060193b 　
Most stable metallic phase of the mixed-valence MMX-chain, Pt-2(dtp)(4)I (dtp=C2H5CS2-), in purely d-electronic conductors based on the transition-metal complex Peer-reviewed

Otsubo, K, Kobayashi, A, Kitagawa, H, Hedo, M, Uwatoko, Y, Sagayama, H, Wakabayashi, Y, Sawa, H

Journal of the American Chemical Society　128　(25)　2006

DOI： 10.1021/ja061871x 　
Intrinsic colossal magnetoresistance effect in thin-film Pr0.5Sr0.5MnO3 through dimensionality switching Peer-reviewed

Uozu, Y, Wakabayashi, Y, Ogimoto, Y, Takubo, N, Tamaru, H, Nagaosa, N, Miyano, K

Physical Review Letters　97　(3)　2006

DOI： 10.1103/PhysRevLett.97.037202 　
Pressure-induced metal-semiconductor-metal transitions in an MMX-chain complex, Pt-2(C2H5CS2)(4)I Peer-reviewed

Kobayashi, Atsushi, Tokunaga, Aya, Ikeda, Ryuichi, Sagayama, Hajime, Wakabayashi, Yusuke, Sawa, Hiroshi, Hedo, Masato, Uwatoko, Yoshiya, Kitagawa, Hiroshi

European Journal of Inorganic Chemistry　(18)　2006

DOI： 10.1002/ejic.200600506 　
Novel orbital ordering induced by anisotropic stress in a manganite thin film Peer-reviewed

Wakabayashi, Y, Bizen, D, Nakao, H, Murakami, Y, Nakamura, M, Ogimoto, Y, Miyano, K, Sawa, H

Physical Review Letters　96　(1)　2006

DOI： 10.1103/PhysRevLett.96.017202 　
Direct determination of low-dimensional structures: Synchrotron X-ray scattering on one-dimensional charge-ordered MMX-chain complexes Peer-reviewed

Wakabayashi, Y, Kobayashi, A, Sawa, H, Ohsumi, H, Ikeda, N, Kitagawa, H

Journal of the American Chemical Society　128　(20)　2006

DOI： 10.1021/ja060111j 　
Halogen-bridged Pt-II/Pt-IV mixed-valence ladder compounds Peer-reviewed

Kawakami, D, Yamashita, M, Matsunaga, S, Takaishi, S, Kajiwara, T, Miyasaka, H, Sugiura, K, Matsuzaki, H, Okamoto, H, Wakabayashi, Y, Sawa, H

Angewandte Chemie-International Edition　45　(43)　7214-7217　2006

DOI： 10.1002/anie.200602987 　
Role of frustration in quasi 1D conductor-Charge ordering and/or CDW in (R-1,R-2-DCNQI)(2)M (M=Ag, Li, Cu) system Peer-reviewed

Sawa, H, Wakabayashi, Y, Tazaki, R, Kakiuchi, T, Kanoda, K, Kato, R

Journal of Low Temperature Physics　142　(3-4)　355-360　2006

DOI： 10.1007/s10909-006-9118-7 　

ISSN： 0022-2291

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Synchrotron X-ray high-resolution measurements have been performed to investigate the nature of the insulating state of a quarter-filled quasi-one-dimensional conductor (DI-DCNQI) 2Ag and the π-d interacted conductor (DBr-DCNQI) 2Cu. The two-fold structure in the ground state of (DI-DCNQI) 2Ag system consists of not only charge ordering columns but also monotonic charge dimerized columns caused by frustration among DCNQI columns. On the other hand, Cu salt in the insulating phase realizes a commensurate structure where the Cu charge ordering is coupled with the 3c-CDW in the insulator phase. The frustration among charged columns is restrained by the charge ordering of the Cu ions. ? Springer Science+Business Media, Inc. 2007.
Relation between ferroelectric and antiferromagnetic order in RMn2O5 Peer-reviewed

Noda, Yukio, Kimura, Hiroyuki, Kamada, Youichi, Osawa, Toshihiro, Fukuda, Yosikazu, Ishikawa, Yoshihisa, Kobayashi, Satoru, Wakabayashi, Yusuke, Sawa, Hiroshi, Ikeda, Naoshi, Kohn, Kay

Physica B-Condensed Matter　385　119-122　2006

DOI： 10.1016/j.physb.2006.05.179 　

ISSN： 0921-4526

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RMn2 O5 (R = Y and rare earth) shows successive magnetic and ferroelectric phase transitions at about 45, 40, 39, 20 and 10 K. We have reinvestigated the magnetic structure of YMn2 O5 at the commensurate phase (T = 25 K) using a single crystal four-circle diffractometer in order to discuss the mechanism of magnetoelectric interaction and the origin of ferroelectricity. We also observed the lattice modulation vectors (qL) to compare the magnetic propagation vectors (qM) by synchrotron X-ray diffraction. Improved magnetic structure data are compared with the theory recently proposed. ? 2006 Elsevier B.V. All rights reserved.
Halogen-bridged Pt-II/Pt-IV mixed-valence ladder compounds Peer-reviewed

Daisuke Kawakami, Masahiro Yamashita, Satoshi Matsunaga, Shinya Takaishi, Takashi Kajiwara, Hitoshi Miyasaka, Ken-ichi Sugiura, Hiroyuki Matsuzaki, Hiroshi Okamoto, Yusuke Wakabayashi, Hiroshi Sawa

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　45　(43)　7214-7217　2006

DOI： 10.1002/anie.200602987 　

ISSN： 1433-7851
Field-induced antiferroquadrupolar order in TbB2C2 observed by resonant X-ray scattering Peer-reviewed

Okuyama, D, Matsumura, T, Nakao, H, Murakami, Y, Wakabayashi, Y, Tobo, A, Onodera, H

Physica B-Condensed Matter　378-80　488-489　2006

DOI： 10.1016/j.physb.2006.01.211 　

ISSN： 0921-4526

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We have investigated the field-induced coexistent phase of antiferroquadrupolar (AFQ) and antiferromagnetic order in TbB2 C2 by resonant X-ray scattering. Incident energy dependences of forbidden and superlattice reflections show that the field-induced AFQ order in TbB2 C2 is structurally the same one as in the AFQ-ordered phase of DyB2 C2 and HoB2 C2 at zero magnetic field. ? 2006 Elsevier B.V. All rights reserved.
Correlation of the superconductivity with the multi-stack structure in MgB2-type superconductor CaAlSi Peer-reviewed

Sagayama, Hajime, Wakabayashi, Yusuke, Sawa, Hiroshi, Kamiyama, Takashi, Hoshikawa, Akinori, Harjo, Stefanus, Uosato, Kentaro, Ghosh, Ajay K., Tokunaga, Masashi, Tamegai, Tsuyoshi, Takano, Y, Hershfield, SP, Hirschfeld, PJ, Goldman, AM

Low Temperature Physics, Pts A and B　850　643-+　2006

DOI： 10.1063/1.2354874 　
Resonant X-ray scattering on antiferroquadrupolar ordering compound Dy0.8Gd0.2B2C2 Peer-reviewed

Sakata, M, Tobo, A, Matsumura, T, Okuyama, D, Murakami, Y, Wakabayashi, Y, Sawa, H, Ohoyama, K, Onodera, H

Physica B-Condensed Matter　359　950-952　2005

DOI： 10.1016/j.physb.2005.01.273 　

ISSN： 0921-4526

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Gd substitution in DyB2C2 enhances the antiferromagnetic (AFM) interaction and weakens the antiferroquadrupolar (AFQ) interaction. In Dy0.8Gd0.2B2C2, two successive transitions occur. By performing resonant X-ray scattering measurements, we confirmed the AFQ ordering temperature TQ=18.0K and the N?el temperature TN=19.5K; TN is higher than TQ in Dy 0.8Gd0.2B2C2, in contrast to DyB2C2. There exists an AFM phase between TQ and TN, and the magnetic structure is described by k=[100]. This kind of AFM phase is also observed in HoB2C2 and TbB2C2, although the magnetic structures of these compounds are long-periodic ones. ? 2005 Elsevier B.V. All rights reserved.
Resonant and non-resonant x-ray scattering from GdB6 Peer-reviewed

Kuwahara, K, Yamamoto, R, Kohgi, M, Nakao, H, Ishii, K, Iwasa, K, Murakami, Y, Kunii, S, Sagayama, H, Wakabayashi, Y, Sawa, H

Physica B-Condensed Matter　359　965-967　2005

DOI： 10.1016/j.physb.2005.01.278 　

ISSN： 0921-4526

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We have performed resonant and non-resonant X-ray scattering on GdB6 to investigate the two successive phase transitions at TN=?15K and T*=?10K. Below TN, new superlattice reflection at the wave vector [141412], which is the same wave vector determined by the epithermal neutron diffraction, has been observed by X-ray scattering. In the temperature region between T* and TN, it was confirmed by the polarization analyses that the superlattice reflection is due to magnetic X-ray scattering. On the other hand, interestingly, the superlattice reflection below T* is mainly due to Thomson scattering. Unlike behavior expected from usual magnetoelastic effects, the wave vector of the lattice distortion is identical to that of the magnetic structure below T*. ? 2005 Elsevier B.V. All rights reserved.
Periodic arrangement of quadrupolar moments induced by the antiferromagnetic order in TbB2C2: Observation by resonant X-ray scattering Peer-reviewed

Okuyama, D, Matsumura, T, Nakao, H, Murakami, Y, Onodera, H, Tobo, A, Wakabayashi, Y, Sawa, H

Journal of the Physical Society of Japan　74　(5)　1566-1571　2005

DOI： 10.1143/JPSJ.74.1566 　

ISSN： 0031-9015

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We have investigated the antiferromagnetic ground state, phase IV, of TbB2C2 by resonant X-ray scattering to study the background of its anomalous magnetic structure. Polarization analysis was carried out to clarify the origin of the superlattice and forbidden reflections that appear below the N?el temperature. We observed magnetic reflections of (1 0 0.5) and (0 0 0.5), consistently with the neutron diffraction experiment by Kaneko et al. In addition, we have detected the (1 0 0) forbidden reflection in the unrotated σ-σ′ channel, which was not observed by neutron diffraction. From the detailed analysis of the resonant X-ray scattering, we conclude that this reflection originates from the ordering of the quadrupolar moment that accompany the canted antiferromagnetic structure of TbB2C2 because of the strong spin-orbit coupling. No lattice distortion was detected. ?2005 The Physical Society of Japan.
Multipole tensor analysis of the resonant X-ray scattering by quadrupolar and magnetic order in DyB2C2 Peer-reviewed

Matsumura, T, Okuyama, D, Oumi, N, Hirotai, K, Nakao, H, Murakami, Y, Wakabayashi, Y

Journal of the Physical Society of Japan　74　(5)　1500-1507　2005

DOI： 10.1143/JPSJ.74.1500 　

ISSN： 0031-9015

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Resonant x-ray scattering (RXS) experiment has been performed for the (3 0 1.5) superlattice reflection in the antiferroquadrupolar and antiferromagnetic phase of DyB2C2. Azimuthal-angle dependence of the resonance enhanced intensities for both dipolar (E1) and quadrupolar (E2) resonant processes has been measured precisely with polarization analysis. Every scattering channel exhibits distinctive azimuthal dependence, differently from the symmetric reflection at (0 0 0.5) which was studied previously. We have analyzed the results using a theory developed by Lovesey et al. [J. Phys.: Condens. Matter 8 (1996) 10983], which directly connects atomic tensors with the cross-section of RXS. The fitting results indicate that the azimuthal dependences can be explained well by the atomic tensors up to rank 2. Rank 4 tensor is not reflected in the RXS data. In addition, the coupling scheme among the 4f quadrupolar moment, 5d ortital, and the lattice has been determined from the interference among the Thomson scattering from the lattice distortion and the resonant scatterings of E1 and E2 processes. It has also been established from the RXS of the (3 0 1.5) reflection that the canting of the 4f quadrupolar moments exists up to TQ. We also discuss a possible wavefunction of the ground state and the existence of the rank 4 moment. ?2005 The Physical Society of Japan.
Floating single hydrogen molecule in an open-cage fullerene Peer-reviewed

Sawa, H, Wakabayashi, Y, Murata, Y, Murata, M, Komatsu, K

Angewandte Chemie-International Edition　44　(13)　1981-1983　2005

DOI： 10.1002/anie.200462850 　

ISSN： 1433-7851

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(Figure Presented) Open-mouthed fullerene swallows H2 whole: Direct observation of a H2 molecule that is fully encapsulated by a derivative of an aza-thia open-cage fullerene (see model) is achieved by synchrotron X-ray diffraction analysis of single crystals. A 3D electron-density map obtained by the maximum entropy method shows a single H2 molecule (red) floating in the center of a hollow cavity in the open-cage fullerene molecule (yellow). ? 2005 Wiley-VCH Verlag GmbH & Co. KGaA.
d-f Coulomb and quadrupole-strain interactions in DyB2C2 observed by resonant x-ray scattering Peer-reviewed

Matsumura, T, Okuyama, D, Oumi, N, Hirota, K, Nakao, H, Murakami, Y, Wakabayashi, Y

Physical Review B　71　(1)　2005

DOI： 10.1103/PhysRevB.71.012405 　

ISSN： 1098-0121

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Experimental evidence of the d-f Coulomb interaction responsible for the resonant x-ray scattering (RXS) from antiferroquadrupolar order in DyB 2C 2 is presented. The energy dependences of the RXS intensity with polarization analysis are analyzed by considering the interference between the resonances of dipolar (E1) and quadrupolar (E2) transition processes. It is found that the structure factors for the E1 and E2 processes have the same sign for σ-π′ but the opposite sign for σ-σ′ channel. This result, when compared to the calculated structure factors, means that the quadrupolar moments of the 4f and 5d shells have opposite signs to each other. Interference between nonresonant Thomson scattering from the lattice distortion and resonant scatterings is also studied, revealing the relation between the displacements of the B and C atoms and the charge distributions of the 4f and 5d shells. ?2005 The American Physical Society.
Lack of influence of anisotropic electron clouds on resonant x-ray scattering from manganite thin films Peer-reviewed

Wakabayashi, Y, Sawa, H, Nakamura, M, Izumi, M, Miyano, K

Physical Review B　69　(14)　2004

DOI： 10.1103/PhysRevB.69.144414 　
Resonant magnetic X-ray scattering from antiferromagnetic order in GdAs Peer-reviewed

Okuyama, D, Matsumura, T, Murakami, Y, Wakabayashi, Y, Sawa, H, Li, DX

Physica B-Condensed Matter　345　(1-4)　63-65　2004

DOI： 10.1016/j.physb.2003.11.021 　

ISSN： 0921-4526

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X-ray magnetic scattering experiment has been performed on the antiferromagnetic order in GdAs. The superlattice reflections with 〈1/21/21/2〉-type propagation vector appear below TN. The energy spectra around the L3 absorption edge of Gd exhibit asymmetric interference structures. From the analysis of the spectrum, with the knowledge of the magnetic structure, it is estimated that the 5d spins are oppositely polarized to the 4f moment. The critical exponent β = 0.31±0.06 has been deduced from the temperature dependence of the intensity. ? 2003 Elsevier B.V. All rights reserved.
Relative contributions of lattice distortion and Coulomb interaction to resonant X-ray scattering in manganites Peer-reviewed

Nakamura, M, Izumi, M, Ogawa, N, Ohsumi, H, Wakabayashi, Y, Miyano, K

Journal of the Physical Society of Japan　73　(10)　2802-2806　2004

DOI： 10.1143/JPSJ.73.2802 　

ISSN： 0031-9015

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We investigated the origin of the energy splitting observed in the resonant x-ray scattering (RXS) in manganites. Using thin film samples with controlled lattice parameters and orbital states at a fixed orbital filling, we estimated that the contribution of the interatomic Coulomb interaction relative to the Jahn-Teller mechanism is insignificant and at most 0.27. This indicates that RXS probes mainly Jahn-Teller distortion in manganites. ? 2004 The Physical Society of Japan.
Resonant X-ray study on the bi-layered perovskite Mn oxide LaSr2Mn2O7 Peer-reviewed

Wakabayashi, Y, Murakami, Y, Koyama, I, Kimura, T, Tokura, Y, Moritomo, Y, Endoh, Y, Hirota, K

Journal of the Physical Society of Japan　72　(3)　618-626　2003

DOI： 10.1143/JPSJ.72.618 　

ISSN： 0031-9015

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Charge and orbital ordering behaviors in the half doped bi-layered compound LaSr2Mn2O7 have been studied by resonant and non-resonant x-ray scattering. Three different order parameters, which correspond to the A-type antiferromagnetism, charge ordering and orbital ordering, were observed by measuring the magnetostriction and the superlattice peaks characterized by wavevectors (1/2 1/2 0) and (1/4 1/4 0), respectively. The superlattice reflections indicating the charge and orbital ordered states were observed below 210 K. Both the intensities reach a maximum at 160 K on cooling and become very weak below 100 K. The peak width of the charge ordered state agrees with that of the orbital ordered state at all temperatures studied. These results indicate that both the states originate from a single phase and that the charge/orbital ordered islands with definite interfaces disperse in the A-type antiferromagnetic phase. The dimensionality of the charge/orbital ordered phase is discussed using this model. ?2003 The Physical Society of Japan.
Resonant X-ray scattering study on the filled skutterudite PrFe4P12 Peer-reviewed

Ishii, K, Inami, T, Murakami, Y, Hao, L, Iwasa, K, Kohgi, M, Aoki, Y, Sugawara, H, Sato, H, Imada, S, Nakao, H, Sawa, H, Wakabayashi, Y

Physica B-Condensed Matter　329　467-468　2003

DOI： 10.1016/S0921-4526(02)02037-9 　

ISSN： 0921-4526

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Resonant X-ray scattering study was carried out to investigate an anomalous ordered state (TA = 6.5 K.) in the filled skutterudite PrFe4P12. At the Pr-LIII absorption edge, we observed resonant features in h + k + l = odd reflections, which are forbidden in the BCC structure above TA. Because these reflections contain the difference of anomalous scattering factor between two Pr atoms in the BCC unit cell, and the ordered state is attributed to the ordering of two different electronic states of Pr. ? 2002 Elsevier Science B.V. All rights reserved.
Resonant X-ray scattering in perovskite manganite superlattice - Observation of "orbital superlattice" Peer-reviewed

Kiyama, T, Wakabayashi, Y, Nakao, H, Ohsumi, H, Murakami, Y, Izumi, M, Kawasaki, M, Tokura, Y

Journal of the Physical Society of Japan　72　(4)　785-788　2003

DOI： 10.1143/JPSJ.72.785 　

ISSN： 0031-9015

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We report the results of resonant X-ray scattering (RXS) measurement of superlattices which consist of La0.45Sr0.55MnO3 and La0.60Sr0.40MnO3 multilayers. An interference technique made it possible to observe RXS reflections from ferro-type orbital ordering in the superlattices. RXS can reveal the local circumstances around specific atoms in materials regulated atomically. In this experiment, we observed that the superlattice is actually composed of two kinds of layers with different lattice distortion states, presenting "orbital superlattices", in which layers with different orbital states are stacked alternately in an atomic scale. ?2003 The Physical Society of Japan.
Low-temperature zigzag charge-ordering structure of alpha '-NaV2O5 Peer-reviewed

Sawa, H, Wakabayashi, Y, Ninomiya, E, Ohama, T, Nakao, H, Murakami, Y, Ohwada, K, Fujii, Y, Noda, Y, Isobe, M, Ueda, Y

Physica B-Condensed Matter　329　878-879　2003

DOI： 10.1016/S0921-4526(02)02547-4 　

ISSN： 0921-4526

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The low-temperature (LT) superstructure of NaV2O5 was determined by synchrotron radiation X-ray diffraction. Below the phase transition temperature at 34 K, the LT structure is monoclinic. It was determined that the LT structure is (a - b) × 2b × 4c with the space group A112, where a, b and c represent the high-temperature orthorhombic unit cell. The valence estimation of V ions shows that the V sites are clearly separated into two groups of V4+ and V5+ with a zigzag charge-ordering pattern. ? 2003 Elsevier Science B.V. All rights reserved.
Experimental elucidation: Microscopic mechanism of resonant X-ray scattering in manganite films Peer-reviewed

Ohsumi, H, Murakami, Y, Kiyama, T, Nakao, H, Kubota, M, Wakabayashi, Y, Konishi, Y, Izumi, M, Kawasaki, M, Tokura, Y

Journal of the Physical Society of Japan　72　(5)　1006-1009　2003

DOI： 10.1143/JPSJ.72.1006 　

ISSN： 0031-9015

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Resonant X-ray scattering experiments have been performed on perovskite manganite La0.5Sr0.5MnO3 thin films, which are grown on three distinct perovskite substrates with a coherent epitaxial strain and have a forced ferro-type orbital ordering of Mn 3d orbitals. Using an interference technique, we have successfully observed the resonant X-ray scattering signal from the system having the ferro-type orbital ordering and also revealed the energy scheme of Mn 4p bands. For the forced ferro-type orbital ordering system, the present results evidence that the resonant X-ray scattering signal originates from the band structure effect due to the Jahn-Teller distortion of a MnO6 octahedron, and not from the Coulomb interaction between 3d and 4p electrons. ? 2003 The Physical Society of Japan.
Charge and orbital ordered states in Nd1-xSr1+xMnO4 (x=0.67,0.75) Peer-reviewed

Nakao, H, Satoh, T, Satoh, J, Murakami, Y, Kubota, M, Wakabayashi, Y, Sawa, H, Kimura, T, Tokura, Y

Physica B-Condensed Matter　329　809-810　2003

DOI： 10.1016/S0921-4526(02)02574-7 　

ISSN： 0921-4526

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The charge and orbital ordered states in the single-layered manganite crystals, Nd1-xSr1-xMnO4 (x = 0.67, 0.75), have been investigated. We have observed the superlattice spots with modulation wave vector, q = (δ, δ, 0), δ = 1/8, 1/4 [?1/6,1/3] in x = 0.75[0.67] by resonant and non-resonant X-ray scattering. These results show that not only the atomic displacement pattern but also the charge-orbital structure has the unit cell of 4√2a × √2a × c [3√2a × √2a × c]. ? 2003 Elsevier Science B.V. All rights reserved.
A small-angle X-ray study on polymer films containing crystalline particles of fatty acid Peer-reviewed

Sakamoto, Y, Hane, S, Ogaguchi, K, Wakabayashi, Y, Tsutsui, K, Wakabayashi, N

Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers　42　(9A)　5735-5740　2003

DOI： 10.1143/JJAP.42.5735 　

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Small-angle and wide angle X-ray scattering studies were carried out on polymer thin films containing microcrystalline behenic acid. Measurements were made on samples in various optical states prepared by appropriate heat treatment. The results were consistent with the picture which presupposes the existence of voids around the crystallites when the composite film is in the opaque state. It was found that, upon cooling, molten behenic acid crystallizes in B or E polymorph, but not in C polymorph. It was concluded that the crystallization temperature for the C form is very low for small particles (0.2-2 μm) so that the molten BA, upon cooling, becomes unstable due to the formation of the crystalline state of the B form at a temperature above the crystallization temperature of the C-form.
Process of charge- and orbital-ordering in layered Mn oxides Peer-reviewed

Wakabayashi, Y.

Journal of the Crystallographic Society of Japan　44　(5)　295-301　2002

DOI： 10.5940/jcrsj.44.295 　
Resonant X-ray studies of the quadrupolar orderings in RB<inf>2</inf>C <inf>2</inf> (R=Dy, Ho) Peer-reviewed

Matsumura, T., Oumi, N., Hirota, K., Nakao, H., Wakabayashi, Y., Murakami, Y.

Journal of the Physical Society of Japan　71　(SUPPL.)　91-93　2002
Quantitative determination of the atomic scattering tensor in orbitally ordered YTiO<inf>3</inf> by using a resonant x-ray scattering technique Peer-reviewed

Nakao, H., Wakabayashi, Y., Kiyama, T., Murakami, Y., Zimmermann, M.V., Hill, J.P., Gibbs, D., Ishihara, S., Taguchi, Y., Tokura, Y.

Physical Review B - Condensed Matter and Materials Physics　66　(18)　2002

DOI： 10.1103/PhysRevB.66.184419 　

ISSN： 2469-9950
Observation of the antiferroquadrupolar order in DyB<inf>2</inf>C<inf>2</inf> by resonant x-ray scattering Peer-reviewed

Matsumura, T., Oumi, N., Hirota, K., Nakao, H., Murakami, Y., Wakabayashi, Y., Arima, T., Ishihara, S., Endoh, Y.

Physical Review B - Condensed Matter and Materials Physics　65　(9)　2002

DOI： 10.1103/PhysRevB.65.094420 　

ISSN： 1098-0121
Observation of antiferroquadrupole ordering in CeB<inf>6</inf> by using Resonant X-ray scattering technique Peer-reviewed

Nakao, H., Magishi, K.-I., Wakabayashi, Y., Murakami, Y., Koyama, K., Hirota, K., Endoh, Y., Kunii, S.

Journal of the Physical Society of Japan　71　(SUPPL.)　103-105　2002
Orbital and charge ordering in La1+xSr1+xMnO4 (0.4 < x <0.5) Peer-reviewed

Y. Wakabayashi, Y. Murakami, Y. Moritomo, I. Koyama, H. Nakao, T. Kiyama, T. Kimura, Y. Tokura, N. Wakabayashi

J. Phys. Soc. Jpn　70　1194 - 1197　2001/01
Resonant x-ray-scattering study of octahedral tilt ordering in LaMnO<inf>3</inf> and Pr<inf>1-x</inf>Ca<inf>x</inf>MnO<inf>3</inf> Peer-reviewed

Zimmermann, M.V., Nelson, C.S., Kim, Y.-J., Hill, J.P., Gibbs, D., Nakao, H., Wakabayashi, Y., Murakami, Y., Tokura, Y., Tomioka, Y., Arima, T., Kao, C.-C., Casa, D., Venkataraman, C., Gog, T.

Physical Review B - Condensed Matter and Materials Physics　64　(6)　064411　2001

DOI： 10.1103/PhysRevB.64.064411 　

ISSN： 2469-9950
Magnetic structure of beta-MnO2: X-ray magnetic scattering study Peer-reviewed

Sato, H, Wakiya, K, Enoki, T, Kiyama, T, Wakabayashi, Y, Nakao, H, Murakami, Y

Journal of the Physical Society of Japan　70　(1)　37-40　2001

DOI： 10.1143/JPSJ.70.37 　

ISSN： 0031-9015
Antiferro-quadrupole ordering of CeB6 studied by resonant X-ray scattering Peer-reviewed

Nakao, H, Magishi, K, Wakabayashi, Y, Murakami, Y, Kayama, K, Hirota, K, Endoh, Y, Kunii, S

Journal of the Physical Society of Japan　70　(7)　1857-1860　2001

DOI： 10.1143/JPSJ.70.1857 　

ISSN： 0031-9015
"Devil's staircase"-type phase transition in NaV<inf>2</inf>O<inf>5</inf> under high pressure Peer-reviewed

Ohwada, K., Fujii, Y., Takesue, N., Isobe, M., Ueda, Y., Nakao, H., Wakabayashi, Y., Murakami, Y., Ito, K., Amemiya, Y., Fujihisa, H., Aoki, K., Shobu, T., Noda, Y., Ikeda, N.

Physical Review Letters　87　(8)　2001

DOI： 10.1103/PhysRevLett.87.086402 　

ISSN： 0031-9007
Time dynamics of photogrowth and decay of long-lived midgap states in an MX chain compound

Noritaka Kuroda, Masato Nishida, Yoshinori Tabata, Yusuke Wakabayashi, Kazuo Sasaki

Physical Review B - Condensed Matter and Materials Physics　61　(17)　11217-11220　2000
Publisher: American Physical Society
ISSN： 0163-1829
Orbital and charge ordering in LaSr2Mn2O7 observed by resonant X-ray scattering Peer-reviewed

Wakabayashi, Y, Murakami, Y, Koyama, I, Kimura, T, Tokura, Y, Moritomo, Y, Hirota, K, Endoh, Y

Journal of the Physical Society of Japan　69　(9)　2731 - 2734　2000/01

DOI： 10.1143/JPSJ.69.2731 　
Transport properties and magnetism of β-MnO<inf>2</inf> Peer-reviewed

Sato, H., Enoki, T., Wakiya, K., Isobe, M., Ueda, Y., Kiyama, T., Wakabayashi, Y., Nakao, H., Murakami, Y., Murakami, Y.

Materials Research Society Symposium-Proceedings　602　17-22　2000
Time dynamics of photogrowth and decay of long-lived midgap states in an MX chain compound Peer-reviewed

Kuroda, N, Nishida, M, Tabata, Y, Wakabayashi, Y, Sasaki, K

Physical Review B　61　(17)　11217-11220　2000

DOI： 10.1103/PhysRevB.61.11217 　

ISSN： 1098-0121
Synchrotron x-ray-diffraction study of orbital ordering in YVO3 Peer-reviewed

Noguchi, M, Nakazawa, A, Oka, S, Arima, T, Wakabayashi, Y, Nakao, H, Murakami, Y

Physical Review B　62　(14)　R9271-R9274　2000

DOI： 10.1103/PhysRevB.62.R9271 　

ISSN： 1098-0121
Pressure-induced phase transition in NaV2O5 at low temperature Peer-reviewed

Ohwada, K, Nakao, H, Nakatogawa, H, Takesue, N, Fujii, Y, Isobe, M, Ueda, Y, Wakabayashi, Y, Murakami, Y

Journal of the Physical Society of Japan　69　(3)　639-642　2000

DOI： 10.1143/JPSJ.69.639 　

ISSN： 0031-9015
Direct observation of antiferroquadrupolar ordering: Resonant X-ray scattering study of DyB2C2 Peer-reviewed

Hirota, K, Oumi, N, Matsumura, T, Nakao, H, Wakabayashi, Y, Murakami, Y, Endoh, Y

Physical Review Letters　84　(12)　2706-2709　2000

DOI： 10.1103/PhysRevLett.84.2706 　

ISSN： 0031-9007
Spatial correlations in the valence of metal ions in Ni1-xPdx(chxn)2Br3

Yusuke Wakabayashi, Nobuyoshi Wakabayashi, Masahiro Yamashita, Toshio Manabe, Nobuyuki Matsushita

Journal of the Physical Society of Japan　68　(12)　3948-3952　1999
Publisher: Physical Society of Japan
DOI： 10.1143/JPSJ.68.3948 　

ISSN： 0031-9015
Charge ordering in La1-xSrxMnO3 (x similar to 0.12) Peer-reviewed

Inami, T, Ikeda, N, Murakami, Y, Koyama, I, Wakabayashi, Y, Yamada, Y

Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers　38　212-214　1999

ISSN： 0021-4922
Polarization-dependent resonant-x-ray diffraction in charge- and orbital-ordering phase of Nd1/2Sr1/2MnO3 Peer-reviewed

Nakamura, K, Arima, T, Nakazawa, A, Wakabayashi, Y, Murakami, Y

Physical Review B　60　(4)　2425-2428　1999

DOI： 10.1103/PhysRevB.60.2425 　

ISSN： 1098-0121
X-ray and optical study on the PtCl chain structure in [Pt(en)(2)][Pt(en)(2)Cl-2](BF4)(4) Peer-reviewed

Wakabayashi, Y, Wakabayashi, N, Kuroda, N, Nishida, M, Matsushita, N

Journal of the Physical Society of Japan　67　(1)　186-191　1998

DOI： 10.1143/JPSJ.67.186 　

ISSN： 0031-9015
Lattice modulation induced by magnetic order in DyZn2 Peer-reviewed

Wakabayashi, Y, Wakabayashi, N, Kitai, T

Journal of the Physical Society of Japan　67　(11)　3901-3905　1998

DOI： 10.1143/JPSJ.67.3901 　

ISSN： 0031-9015
Decay kinetics of long-lived photogenerated kinks in an MX chain compound Peer-reviewed

Kuroda, N, Wakabayashi, Y, Nishida, M, Wakabayashi, N, Yamashita, M, Matsushita, N

Physical Review Letters　79　(13)　2510-2513　1997

DOI： 10.1103/PhysRevLett.79.2510 　

ISSN： 0031-9007

Show all ︎Show first 5

Misc. 182

Recent Advances in Surface X-ray Diffraction Peer-reviewed

Yusuke WAKABAYASHI

Nihon Kessho Gakkaishi　64　(1)　26-32　2022/02/28
Publisher: The Crystallographic Society of Japan
DOI： 10.5940/jcrsj.64.26 　

ISSN： 0369-4585

eISSN： 1884-5576
高速X線反射率測定により錆の形成過程を解明

若林裕助, 藤井宏昌, 土井教史

アイソトープニュース　773　47-50　2021/02
フラストレート磁性体Ba₃CuSb₂O₉のスピンと軌道の相関

若林裕助

放射光 : 日本放射光学会誌　27　(3)　166-171　2014/05
Publisher: 日本放射光学会
ISSN： 0914-9287
Structure of molecules in the conduction layer of rubrene organic transistor

WAKABAYASHI Yusuke

24　(1)　19-23　2011/01/30
Publisher: 日本放射光学会
ISSN： 0914-9287
Conference report : The 11th International Conference on Surface X-ray and Neutron Scattering

WAKABAYASHI Yusuke

23　(6)　396-396　2010/11/30

ISSN： 0914-9287
Development and application of the resonant x-ray scattering on the observation of the orbital/charge ordering

WAKABAYASHI Yusuke

21　(2)　118-120　2008/03/31
Publisher: 日本放射光学会
ISSN： 0914-9287
Observation of a low-dimensional structure-Utilization of anomalous scattering in analysis of X-ray diffuse scattering

WAKABAYASHI Yusuke

20　(1)　26-32　2007/01/31
Publisher: 日本放射光学会
ISSN： 0914-9287
Raman scattering spectroscopy of α-RuCl₃ doped with ionic liquids

上野優典, 中村優斗, 佐藤楓貴, 今野克哉, 青山拓也, 今井良宗, 大串研也, 若林裕助, 岩井伸一郎, 岸田英夫

日本物理学会講演概要集(CD-ROM)　78　(2)　2023

ISSN： 2189-079X
Superconducting transition temperature enhancement of TaC thin film induced by graphene growth and its mechanism

近藤大斗, 榊原涼太郎, 林直輝, 伊藤孝寛, 遠藤彰, 鈴木舞奈佳, 石井祐太, 若林裕助, 乗松航

応用物理学会秋季学術講演会講演予稿集(CD-ROM)　83rd　2022

ISSN： 2758-4704
Ultrafast magneto-optical responses of spin-orbit assisted Mott insulator α-RuCl₃: II

天野辰哉, 川上洋平, 伊藤弘毅, 今野克哉, 青山拓也, 今井良宗, 大串研也, 若林裕助, 後藤貫太, 中村優斗, 岸田英夫, 米満賢治, 岩井伸一郎

日本物理学会講演概要集(CD-ROM)　77　(2)　2022

ISSN： 2189-079X
Ultrafast magneto-optical responses of spin-orbit assisted Mott insulator α-RuCl₃

天野辰哉, 川上洋平, 伊藤弘毅, 今野克哉, 青山拓也, 今井良宗, 大串研也, 若林裕助, 後藤貫太, 中村優斗, 岸田英夫, 米満賢治, 岩井伸一郎

日本物理学会講演概要集(CD-ROM)　77　(1)　2022

ISSN： 2189-079X
Ultrafast spin dynamics of Kitaev spin liquid candidate α-RuCl₃: III

天野辰哉, 大橋拓純, 川上洋平, 伊藤弘毅, 今野克哉, 青山拓也, 今井良宗, 大串研也, 若林裕助, 後藤貫太, 中村優斗, 岸田英夫, 米満賢治, 岩井伸一郎

日本物理学会講演概要集(CD-ROM)　76　(1)　2021

ISSN： 2189-079X
Ultrafast spin dynamics of Kitaev spin liquid candidate α-RuCl₃: II

天野辰哉, 赤嶺勇人, 大橋拓純, 川上洋平, 伊藤弘毅, 今野克哉, 長谷川慶直, 佐々木宏也, 青山拓也, 今井良宗, 大串研也, 若林裕助, 米満賢治, 岩井伸一郎

日本物理学会講演概要集(CD-ROM)　75　(1)　2020

ISSN： 2189-079X
マルチフェロイック材料とその設計

木村剛, 上田大貴, 春木康平, 奥村幸司, 青山拓也, 若林裕助, 清水克哉, 廣瀬左京, 田中良和

日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM)　29th　2016
7pBG-7 Microscopic mechanism in huge variation of Laue fringe pattern in charge-/orbital-ordered superlattice and its internal structure

Okuyama D., Wakabayashi Y., Nakamura M., Kumai R., Nakao H., Murakami Y., Kawasaki M., Taguchi Y., Arima T., Tokura Y.

Meeting abstracts of the Physical Society of Japan　69　(2)　339-339　2014/08/22
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
7pBJ-9 Semiconducting behavior and magnetic properties of tetragonal Yb_2MgSi_2

Numakura R., Kosaka M., Michimura S., Katano S., Nakajima D., Nonaka R., Wakabayashi Y., Terashima T., Ohta H., Katori H. A.

Meeting abstracts of the Physical Society of Japan　69　(2)　342-342　2014/08/22
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
10aBH-8 External voltage control of LaAlO_3/SrTiO_3 interface structure

Fujii H., Minohara M., Bell C., Hikita Y., Hwang H. Y., Kimura T., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　69　(2)　454-454　2014/08/22
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
8aPS-87 Electrical resistivity of tetragonal R_2MgSi_2(R=Yb, Tm, Er)

Numakura R., Kosaka M., michimura S., Katano S., Nakajima D., Nonaka R., Wakabayashi Y., Terashima T., Ohta H., Katori H. A.

Meeting abstracts of the Physical Society of Japan　69　(2)　377-377　2014/08/22
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
10aBC-5 Low temperature structure of S=1 kagome antiferromagnet KV_3Ge_2O_9

Takagi E., Hara S., Sato H., Kimura T., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　69　(2)　312-312　2014/08/22
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aPS-21 Electric field dependence of structure of cobalt thin film

Fujii H., Chiba D., Koyama T., Sakata O., Kimura T., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　69　(1)　479-479　2014/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28aCM-4 Cu/Sb short range order in Ba_3CuSb_2O_9

Wakabayashi Y., Nakajima D., Kimura K., Kimura T., Nakatsuji S.

Meeting abstracts of the Physical Society of Japan　69　(1)　591-591　2014/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28aAL-4 Study of structural chirality in DyFe_3(BO_3)_4 with resonant circularly polarized x-ray diffraction : absorption-edge dependency

Nakajima H., Usui T., Tanaka Y., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　69　(1)　921-921　2014/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pEA-2 Time dependent study of electric double layer formation at an ionic liquid-gold interface

Wolfgang Voegeli, Arakawa E., Matsusita T., Sakata O., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　68　(2)　473-473　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Time dependent study of electric double layer formation at an ionic liquid - gold interface

Voegeli Wolfgang, Arakawa E., Matsushita T., Sakata O., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　68　(2)　745-745　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Study of chiral structures in RFe_3(BO_3)_4 with resonant circularly polarized X-ray diffraction

Nakajima H., Usui T., Tanaka Y., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　68　(2)　841-841　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Structural study of thickness-dependent conductor LaNiO_3 ultrathin films

Maeda H., Sakai E., Kumigashira H., Kimura K., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　68　(2)　577-577　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Polarized neutron scattering in electric and magnetic fields for multiferroic Mn_2GeO_4

Honda T., White S.J., Kenzelmann M., Chapon C.L., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　68　(2)　566-566　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aXP-5 Electron density analysis of the surface of organic tetracene crystals

Morisaki H., Miwa K., Takeya J., Kimura T., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　68　(1)　930-930　2013/03/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28pXU-1 Observation of Structural Chirality of the DyFe_3(BO_3)_4 by using Circularly polarized Resonant Soft X-ray Diffraction

Usui T., Tanaka Y., Nagai M., Ashida M., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　68　(1)　1042-1042　2013/03/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28pXT-5 Electronic states of organic interfaces

Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　68　(1)　955-955　2013/03/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
価数揺動物質YbPdの電荷秩序相転移に伴う構造変化

高橋亮, 本田孝志, 三宅厚志, 加賀山朋子, 清水克哉, 海老原孝雄, 木村剛, 若林裕助

日本物理学会講演概要集　68　(1)　669　2013/03/05

ISSN： 1342-8349
18aGA-6 Dynamics of Cu3d orbital in Ba_3CuSb_2O_9

Ishiguro Y., Tsutsui S., Baron A.Q., Kimura K., Nakatsuji S., Kimura T., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　67　(2)　448-448　2012/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
多成分磁気構造を持つマルチフェロイックMn₂GeO₄における電場下偏極中性子回折

本田孝志, WHITE J. S, KENZELMANN M, 若林裕助, 木村剛

日本物理学会講演概要集　67　(2)　487-487　2012/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aAF-2 Observation of spin-chiral domains in hexagonal ferrites Ba_<0.5>Sr_<1.5>A_2Fe_<12>O_<22> (A=Zn,Ni) by using resonant circularly polarized X-ray diffraction

Hiraoka Y., Tanaka Y., Shin S., Usui T., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　67　(1)　534-534　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pYF-1 Microscopic structure of electric double layer transistor : Voltage dependence of ionic liquid/Au(111) interfacial structure

Yamamoto R., Morisaki H., Sakata O., Shimotani H., Yuan H.T., Iwasa Y., Kimura T., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　67　(1)　643-643　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26pYF-8 X-ray diffuse scattering measurement of Ba_3CuSb_2O_9

Ishiguro Y., Kimura K., Nakatsuji S., Kimura T., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　67　(1)　672-672　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24pYF-3 Low-temperature in-field crystal structure of SmMnO_3 showing the coupling between magnetic and dielectric properties

Maeda H., Ishiguro Y., Jung Jong-Suck, Michimura S., Inami T., Kimura T., Wakabayashi 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
24pCF-10 Surface structure analysis of organic tetracene crystals

Morisaki H., Miwa K., Takeya J., Kimura T., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　67　(1)　881-881　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
ラウエフリンジの巨大な温度・磁場変化に現れるペロブスカイトマンガン酸化物超格子の界面電荷軌道秩序相

奥山大輔, 若林裕助, 中村優男, 熊井玲児, 中尾裕則, 村上洋一, 川崎雅司, 川崎雅司, 田口康二郎, 有馬孝尚, 十倉好紀, 十倉好紀, 十倉好紀

日本物理学会講演概要集　67　(1)　551-551　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pAF-4 Magnetoelectric effect of S=1/2 quasi-1D AFM SrCo_2V_2O_8

Usui T, Kida T, Hagiwara M, Wakabayashi Y, Kimura T

Meeting abstracts of the Physical Society of Japan　67　(1)　516-516　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
ラウエフリンジの巨大な温度/磁場変化を生ずるマンガン酸化物超格子の界面電荷軌道秩序相

奥山大輔, 若林裕助, 中村優男, 熊井玲児, 中尾裕則, 村上洋一, 川崎雅司, 川崎雅司, 田口康二郎, 有馬孝尚, 十倉好紀, 十倉好紀, 十倉好紀

PFシンポジウム要旨集　29th　46　2012
21pGB-2 Study of magneto-strictive effect in N-type ferrimagnet SmMnO_3

Jung J. -S., Iyama A., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　66　(2)　471-471　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
22pGK-13 Synthesis and Magnetoelectric Property of U-type Hexaferrite

Okumura K., Ishikura T., Nakamura H., Soda M., Asaka T., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　66　(2)　543-543　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
23aPS-134 Multiferroic properties and crystal structure in multiferroic compounds of RMn_2O_5(R=Sm, Gd)

Kimura H., Horio S., Fukunaga M., Noda Y., Wakabayashi Y., Nakao H., Murakami Y.

Meeting abstracts of the Physical Society of Japan　66　(2)　1005-1005　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
23aTE-10 Structural materials study on low-dimensionally ordered systems

Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　66　(2)　878-878　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
オリビン型Mn₂GeO₄における電気磁気特性の元素置換からのアプローチ

本田孝志, 木村健太, 石黒友貴, 中村浩之, 若林裕助, 中野岳仁, 野末泰夫, 木村剛

日本物理学会講演概要集　66　(2)　474-474　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28pEH-2 Molecular beam epitaxy of potassium tantalate

Nakamura H., Wakabayashi Y., Kimura T.

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
28pTB-4 Structural materials study on low-dimensionally ordered systems

Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　66　(1)　898-898　2011/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pEF-9 Neutron Diffraction Studies of U-type Hexaferrite with Magnetoelectric Effect

Soda Minoru, Okumura Koji, Wakabayashi Yusuke, Kimura Tsuyoshi

Meeting abstracts of the Physical Society of Japan　66　(1)　561-561　2011/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
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
オリビン型マンガン酸化物Mn₂GeO₄の電気磁気特性および置換効果

本田孝志, 木村健太, 石黒友貴, 中村浩之, 若林裕助, 中野岳仁, 野末泰夫, 木村剛

日本物理学会講演概要集　66　(1)　559-559　2011/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24pWJ-5 Element Specific Magnetometry with Hard-X-ray Magnetic Circular Dichroism Technique for SmMnO_3

Jung J.-S., Iyama A., Mizumaki M., Kawamura N., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　65　(2)　573-573　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24pWJ-4 Dynamical dielectric properties of A-type antiferromagnetic rare-earth manganites

Iyama A., Jung JongSuck, Yamaguchi Y., Nakano T., Nozue Y., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　65　(2)　573-573　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pWB-9 Interfacial structure of LaAlO_3 film grown on SrTiO_3 studied by surface X-ray scattering : substrate termination layer dependence

Yamamoto R., Wakabayashi Y., Kimura T., Bell C., Hikita Y., Hwang H. Y.

Meeting abstracts of the Physical Society of Japan　65　(2)　598-598　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pWB-8 Interfacial Structure of LaAlO_3 film grown on SrTiO_3 Studied by Surface X-ray Scattering : Growth Temperature Dependence

Wakabayashi Y., Yamasaki Y., Kimura T., Bell Chris, Hikita Y., Hwang Harold Y.

Meeting abstracts of the Physical Society of Japan　65　(2)　597-597　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
23pWY-5 Relationship between relaxer-like behavior and magnetic order in LuFeMO_4(M=Co and Mg)

Soda M., Aoyama T., Hirota K., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　65　(2)　889-889　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
オリビン型マンガン酸化物Mn₂GeO₄の単結晶作成及び磁気・電気特性

本田孝志, 木村健太, 石黒友貴, 中村浩之, 若林裕助, 木村剛

日本物理学会講演概要集　65　(2)　573-573　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24aPS-125 Lattice modulation of multiferroic (Eu,Sm)Mn_2O_5 studied by synchrotron radiation x-ray

Horio Satoru, Yamazaki Kenta, Lin Jin, Fukunaga Mamoru, Kimura Hiroyuki, Noda Yukio, Abe Nobuyuki, Arima Taka-hisa, Nakao Hironori, Wakabayashi Yusuke

Meeting abstracts of the Physical Society of Japan　65　(2)　901-901　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
20pGV-4 Sub-Åresolution surface structure analysis by surface x-ray diffraction technique

Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　65　(1)　866-866　2010/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21pGS-2 Interfacial structure of rubrene FET observed by surface x-ray diffraction technique : gate voltage effect

Wakabayashi Y., Takeya J., Kimura T.

Meeting abstracts of the Physical Society of Japan　65　(1)　888-888　2010/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
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
20aGF-7 Composition dependence of magnetoelectric coupling in Ba_<2-x>Sr_xNi_2Fe_<12>O_<22>

Hiraoka Y., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　65　(1)　533-533　2010/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
22pHS-8 Structure analysis of DyVO_4 single crystal Below and above Jahn-Teller transition temperature

Ishikura T., Kishimoto K., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　65　(1)　1000-1000　2010/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21aGF-5 Anomalies of dielectric constant in SmMnO_3

Jung J. -S., Iyama A., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　65　(1)　597-597　2010/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
磁性イオンをもつリラクサー誘電体におけるナノ磁気ドメイン

左右田稔, 青山拓也, 若林裕助, 木村剛, 廣田和馬

日本中性子科学会年会講演概要集　10th　2010
放射光を用いたMn酸化物薄膜の電荷軌道秩序の観測

奥山大輔, 中村優男, 若林裕助, LEE Jong Seok, 熊井玲児, 田口康二郎, 有馬孝尚, 川崎雅司, 川崎雅司, 十倉好紀, 十倉好紀, 十倉好紀

PFシンポジウム要旨集　27th　66　2010
26aYJ-12 In-plane anisotropy accompanied by Jahn-Teller transition in RVO_4

Kishimoto K., Ishikura T., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　64　(2)　867-867　2009/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pYD-13 Surface structure of an organic FET material rubrene observed by surface x-ray diffraction technique

Wakabayashi Y., Takeya J., Kimura T.

Meeting abstracts of the Physical Society of Japan　64　(2)　780-780　2009/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aRL-6 Magnetic-field-induced ferroelectricity of Y type hexagonal ferrite (Ba, Sr)_2N_<2>Fe_<12>O_<22>

Hiraoka Y., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　64　(2)　412-412　2009/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26aRK-5 Substitution effect of Ga ion on charge/orbital ordering in La_<0.5>Sr_<1.5>MnO_4

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

Meeting abstracts of the Physical Society of Japan　64　(2)　472-472　2009/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28aTD-1 Resonant X-ray Diffraction from CeB_6 in Magnetic Fields

Yonemura T., Kunimori K., Matsumura T., Sera M., Iga F., Wakabayashi Y., Arima T.

Meeting abstracts of the Physical Society of Japan　64　(1)　588-588　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pTG-12 Relation between magnetism and lattice distortion in a triangular lattice antiferromagnet CuCrO_2

Kimura K., Nakamura H., Ohgushi K., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　64　(1)　456-456　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aYF-6 Synthesis and physical properties of 4-legged MX-Ladder complex, [Pt(en)(bpy)I]_4(NO_3)_8・16H_2O

Otsubo Kazuya, Kitagawa Hiroshi, Wakabayashi Yusuke, Ohara Jun, Yamamoto Shoji, Matsuzaki Hiroyuki, Okamoto Hiroshi

Meeting abstracts of the Physical Society of Japan　64　(1)　807-807　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aYF-7 Valence Arrangement of Pt Ions in the Tube Type MX Complex [Pt(en)(bpy)I]_4(NO_3)_8・16H_2O

Wakabayashi Y., Otsubo K., Kitagawa H.

Meeting abstracts of the Physical Society of Japan　64　(1)　807-807　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28aTH-6 Magnetic field effect on Jahn-Teller transition in RVO_4

Kishimoto K., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　64　(1)　476-476　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aTA-2 Coexistence of ferromagnetic and ferroelectric phases in (Eu, Y) MnO_3

Danjoh S., Nakamura H., Wakabayashi Y., Kimura T.

Meeting abstracts of the Physical Society of Japan　64　(1)　518-518　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Pr_0.5Ca_0.5MnO₃薄膜の軌道放射光による電荷軌道状態の観測とバルク試料との比較

奥山大輔, 若林裕助, 中村優男, 熊井玲児, 山田浩之, 田口康二郎, 有馬孝尚, 川崎雅司, 川崎雅司, 十倉好紀, 十倉好紀, 十倉好紀, 十倉好紀

日本物理学会講演概要集　64　(1)　621　2009/03/03

ISSN： 1342-8349
28pTL-1 Observation of charge- and orbital-ordered state of Pr_<0.5>Ca_<0.5>MnO_3 thin film by the synchrotron radiation x-ray and comparison with the bulk sample

Okuyama D, Wakabayashi Y, Nakamura M, Kumai R, Yamada H, Taguchi Y, Arima T, Kawasaki M, Tokura Y

Meeting abstracts of the Physical Society of Japan　64　(1-3)　621-621　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28pTL-5 Impurity effect on charge/orbital ordering in La_<0.5>Sr_<1.5>Mn_<0.97>M_<0.03>O_4 (M=Mn,Cr,Fe,Ga)

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

Meeting abstracts of the Physical Society of Japan　64　(1)　622-622　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21pQC-7 Interfacial structure of LaAlO_3 film made on SrTiO_3

Wakabayashi Y., Bell Chris, Higuchi T., Hikita Y., Hwang Harold Y.

Meeting abstracts of the Physical Society of Japan　63　(2)　750-750　2008/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21pQC-7 Interfacial structure of LaAlO_3 film made on SrTiO_3

Wakabayashi Y., Bell Chris, Higuchi T., Hikita Y., Hwang Harold Y.

Meeting abstracts of the Physical Society of Japan　63　(2)　530-530　2008/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26aYB-6 Photo-induced structural change of a photo-switching film Pr_<0.55>(Ca_<1-y>Sr_y)_<0.45>MnO_3

Wakabayashi Y., Ogawa N., Takubo N., Ichikawa H., Sato T., Ichiyanagi K., Adachi S., Koshihara S., Miyano K., Sawa H.

Meeting abstracts of the Physical Society of Japan　63　(1)　641-641　2008/02/29
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
23pWG-10 Structure and properties of a photo-induced metal-insulator switching Pr_<0.55>(Ca_<1-y>Sr_y)_<0.45>MnO_3 thin film

Wakabayashi Y., Sawa H., Takubo N., Miyano K.

Meeting abstracts of the Physical Society of Japan　62　(2)　634-634　2007/08/21
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
19aWG-7

Wakabayashi Y., Upton M.H., Grenier S., Hill J.P., Nelson C.S., Mitchell J.F., Zheng H., Kim J-W., Goldman A.I.

Meeting abstracts of the Physical Society of Japan　62　(1)　547-547　2007/02/28
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
19aWG-11 Optical anisotropy in R_<0.5>Ba_<0.5>MnO_3 epitaxial thin films

Kubo Y., Wakabavashi Y., Ogawa N., Tamaru H., Miyano K.

Meeting abstracts of the Physical Society of Japan　62　(1)　548-548　2007/02/28
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
20aWF-11 The observation of local structure near Zn^<2+> ion in KCu_xZn_<1-x>F_3

Tatami N, Ando Y, Niioka S, Kira H, Onodera M, Nakao H, Iwasa K, Murakami Y, Sawa H, Wakabayashi Y, Itoh S, Kakiuchi T

Meeting abstracts of the Physical Society of Japan　62　(1)　606-606　2007/02/28
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Lattice modulation induced by antiferromagnetic orderings in multiferroic RMn₂O₅

Hiroyuki KIMURA, Satoru KOBAYASHI, Youichi KAMADA, Yoshihisa ISHIKAWA, Kohei KADOSHITA, Yukio NODA, Naoshi IKEDA, Yusuke WAKABAYASHI, Kay KOHN

Photon Factory Activity Report　24　(B)　176　2007
21pXJ-6 Study of the interface structure of Fe silicide on the Si surface with X-ray diffraction

Sekiguchi K, Wakabayashi Y, Iwasawa Y, Nojima T, Arai D, Vobegeli Wolfgang, Shirasawa T, Takahashi T, Hattori K, Hattori A

Meeting Abstracts of the Physical Society of Japan　62　(0)　912-912　2007
Publisher: The Physical Society of Japan
ISSN： 1342-8349
25aZB-2 Physical property and structural control of MX-Ladder complex

Kobayashi Atsushi, Otsubo Kazuya, Kitagawa Hiroshi, Wakabayashi Yusuke, Sawa Hiroshi

Meeting abstracts of the Physical Society of Japan　61　(2)　691-691　2006/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24aYF-7 Precise structure analysis of H_2@C_<60> using synchrotron radiation X-ray diffraction

Akada Misaho, Kakiuchi Toru, Murata Yasujiro, Komatsu Koichi, Tanigaki Katsumi, Wakabayashi Yusuke, Sawa Hiroshi

Meeting abstracts of the Physical Society of Japan　61　(2)　679-679　2006/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
23pZQ-11 Orbital ordering in half-doped manganite thin films on (011) substrates

Wakabayashi Y, Bizen D, Nakao H, Murakami Y, Nakamura M, Ogimoto Y, Miyano K, Sawa H

Meeting abstracts of the Physical Society of Japan　61　(2)　400-400　2006/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
23pZQ-10 Orbital ordering in Nd_<0.5>Sr_<0.5>MnO_3 thin films on SrTiO_3(011) substrate under magnetic field

Wakabayashi Y, Sagayama H, Arima T, Bizen D, Nakao H, Murakami Y, Nakamura M, Ogimoto Y, Miyano K, Sawa H

Meeting abstracts of the Physical Society of Japan　61　(2)　400-400　2006/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
29pPSA-17 Superconductivity and supre structure in Ce_2RhIn_8

Koeda M., Fujiwara T., Hedo M., Uwatoko Y., Sagayama H., Wakabayashi Y., Sawa H.

Meeting abstracts of the Physical Society of Japan　61　(1)　632-632　2006/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28pTD-5 Physical property of MX-Ladder complex under high pressure

Kobayashi Atsushi, Otsubo Kazuya, Kitagawa Hiroshi, Hedo Masato, Uwatoko Yoshiya, Sagayama Hajime, Wakabayashi Yusuke, Sawa Hiroshi

Meeting abstracts of the Physical Society of Japan　61　(1)　836-836　2006/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28aXD-2 Structure of lattice modulation in RMn_2O_5 characterized by magnetism and ferroelectricity

Noda Y., Kimura H., Kamada Y., Ishikawa Y., Kobayashi S., Wakabayashi Y., Ikeda N., Kohn K.

Meeting abstracts of the Physical Society of Japan　61　(1)　931-931　2006/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aRA-7 Origin of the CMR in Pr_<0.5>Sr_<0.5>MnO_3 thin films fabricated on LSAT(110) substrates

Uozu Y., Takubo N., Wakabayashi Y., Sagayama H., Sawa H., Arima T., Tamaru H., Miyano K.

Meeting abstracts of the Physical Society of Japan　61　(1)　506-506　2006/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aUE-1 Dilution effect

Ando Y, Tatami N, Niioka S, Murakami Y, Iwasa K, Nakao H, Kira H, Tamura H, Sawa H, Wakabayashi Y, Itoh S, Kakiuti T

Meeting abstracts of the Physical Society of Japan　61　(1)　514-514　2006/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
19pPSA-63 Relation between super structure and superconductivity in pressure induced heavy fermion superconductor Ce_2RhIn_8

Sagayama H., Wakabayashi Y., Sawa H., Koeda M., Fujiwara T., Hedo M., Uwatoko Y.

Meeting abstracts of the Physical Society of Japan　60　(2)　408-408　2005/08/19
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
20aWB-7 新規擬一次元ハロゲン架橋Ni-Pd混合金属錯体Ni_<1-x>Pd_x(R,R-bn)_2Br_3の合成とその電子構造(導電性高分子,金属鎖(ポリマー,MX,MMX),領域7(分子性固体・有機導体))

高石慎也, 佐々木真理, 梶原孝志, 山下正廣, 岸田英夫, 岡本博, 若林裕助, 澤博

日本物理学会講演概要集　60　(2)　687-687　2005/08/19
Publisher: 一般社団法人日本物理学会
ISSN： 1342-8349
20pYF-6 Study of Charge Density in Halogen Bridged Quasi-One-Dimensional Metal Complex MX and MMX using Synchrotron Radiation X-ray Scattering

Sawa H., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　60　(2)　697-697　2005/08/19
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
20aWB-11 Electrical conductivity and electronic states of MMX complex, Pt_2(dtp)_4l under high pressure

Otsubo Kazuya, Ozawa Akio, Kobayashi Atsushi, Yamauchi Miho, Kitasawa Hiroshi, Hedo Masato, Uwatoko Yoshiya, Wakabayashi Yusuke, Sawa Hiroshi

Meeting abstracts of the Physical Society of Japan　60　(2)　688-688　2005/08/19
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21pWB-4 Structural and transport properties of the incommensurate organic conductor (MDT-TS)(I_3)_<0.407>

Kawamoto T., Endo H., Bando Y., Mori T., Kakiuchi T., Wakabayashi Y., Sawa H., Kitagawa H., Takimiya K., Otsubo T.

Meeting abstracts of the Physical Society of Japan　60　(2)　705-705　2005/08/19
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24pPSA-1 MBE growth of γ-Fe_2O_3 by ozone beam and its structure

Hasegawa Manabu, Shibata Kenichi, Yanagihara Hideto, Kita Eiji, Wakabayashi Yusuke, Sawa Hiroshi, Shiratori Kiichi, Oda Katsuro

Meeting abstracts of the Physical Society of Japan　60　(1)　422-422　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24pXN-9 Magnetic and electric properties of epitaxial γ-Fe_2O_3 films

Yanagihara Hideto, Hasegawa Manabu, Kita Eiji, Wakabayashi Yusuke, Sawa Hiroshi, Shiratori Kiichi

Meeting abstracts of the Physical Society of Japan　60　(1)　417-417　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24aYR-11 Magnetism, Ferroelectricity and Lattice modulation of RMn_2O_5

Noda Y., Kobayashi S., Kimura H., Kamada Y., Kadoshita K., Kohn K., Ikeda N., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　60　(1)　891-891　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aPS-28 Pressure effect on lattice anomaly of PrFe_4P_<12>

Kawana D., Sagayama H., Sato M., Kuwahara K., Aoki Y., Kohgi M., Sato H., Iwasa K., Sugawara H., Wakabayashi Y., Sawa H.

Meeting abstracts of the Physical Society of Japan　60　(1)　528-528　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aYN-3 The insulating phase of DCNQI_2Cu has been proved to be a commensurate structure by SOR x-ray.

Tazaki Ryoko, Sagayama Hajime, Wakabayashi Yusuke, Sawa Hiroshi, Kato Reizo

Meeting abstracts of the Physical Society of Japan　60　(1)　790-790　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pYL-6 Structural modulation of the incommensurate organic superconductor (MDT-TS)(AuI_2)_<0.441>

Kawamoto T., Endo H., Bando Y., Mori T., Kakiuchi T., Wakabayashi Y., Sawa H., Takimiya K., Otsubo T.

Meeting abstracts of the Physical Society of Japan　60　(1)　825-825　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pYK-3 Valence arrangement in a MX-ladder complex

Wakabayashi Y., Sawa H., Kawakami D., Takaishi S., Yamashita M.

Meeting abstracts of the Physical Society of Japan　60　(1)　822-822　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aPS-82 Multipole tensor analysis of the resonant x-ray scattering by antiferroquadrupolar order in DyB_2C_2

Matsumura T, Okuyama D, Nakao H, Murakami Y, Wakabayashi Y

Meeting abstracts of the Physical Society of Japan　60　(1)　541-541　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
22aYG-13 Synchrotron Radiation X-ray Diffraction Study of M-I Transition in PrRu_4P_<12> under High Pressure

Sagayama H., Wakabayashi Y., Sawa H., Kawana D., Kuwahara K., Kohgi M., AOki Y., Sato H., Sugawara H., Iwasa K.

Meeting abstracts of the Physical Society of Japan　60　504-504　2005
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
13pWF-8 Pressure dependence of X-ray diffuse scattering in a one-dimensional halogen-bridged binuclear-metal complex, Pt_2(C_2H_5CS_2)_4I

Kobayashi Atsushi, Kitagawa Hiroshi, Wakabayashi Yusuke, Sawa Hiroshi

Meeting abstracts of the Physical Society of Japan　59　(2)　758-758　2004/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
13pWF-7 Charge-density-wave in the MMX complex [Pt_2(dtp)_4]I observed by synchrotron radiation

Wakabayashi Y., Sawa H., Kobayashi A., Kitagawa H.

Meeting abstracts of the Physical Society of Japan　59　(2)　758-758　2004/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
13aTL-11 Lattice distortion in TbMn_2O_5 associated with simultaneous ferroelectric and magnetic phase transitions

Kobayashi S., Kimura H., Kadoshita K., Noda Y., Kohn K., Ikeda N., Wakabayashi Y.

Meeting abstracts of the Physical Society of Japan　59　(2)　862-862　2004/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
13aRB-6 Observation of the electronic density distribution in α'-NaV_2O_5 by X-ray single crystal diffraction

Toki M, Wakabayashi Y, Sawa H, Kikuchi J, Takigawa M, Isobe M, Ueda H

Meeting abstracts of the Physical Society of Japan　59　(2)　449-449　2004/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
12aRC-7 Investigation of phase of AFQ and AFM orders in TbB_2C_2 by resonant x-ray scattering in magnetic fields

Okuyama D, Matsumura T, Nakao H, Iwasa K, Murakami Y, Onodera H, Tobo A, Wakabayashi Y, Sawa H

Meeting abstracts of the Physical Society of Japan　59　(2)　422-422　2004/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
30aWL-9 X-ray diffuse scattering study on charge-density-wave and charge-polarized complexes

Wakabayashi Y., Sawa H., Kobayashi A., Kitagawa H.

Meeting abstracts of the Physical Society of Japan　59　(1)　870-870　2004/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pXC-10 X-ray scattering study of orbital network in KCu_xZn_<1-x>F_3

Niioka N, Tatami N, Okuyama D, Murakami Y, Itoh S, Wakabayashi Y, Sawa H

Meeting abstracts of the Physical Society of Japan　59　(1)　530-530　2004/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
30pXC-9 Correlation of the superconductivity with the super lattice structure in MgB_2 type superconductor CaAlSi

Sagayama H, Wakabayashi Y, Sawa H, Hoshikawa A, Harjo S., Kamiyama T, Toki M, Uosato K, Ghosh A. K., Tokunaga M, Tamegai T

Meeting abstracts of the Physical Society of Japan　59　(1)　649-649　2004/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Quadrupoler order with magnetic order of TbB_2C_2 at zero magnetic field

Okuyama D., Matsumura T., Murakami Y., Onodera H., Tobo A., Wakabayashi Y., Sawa H.

Meeting abstracts of the Physical Society of Japan　58　(2)　462-462　2003/08/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
In-chain atomic arrangement in quasi one-dimensional MMX, chain complexes [Pt_2(dta, dtp)_4]I

Wakabayashi Y., Sawa H., Kobayashi A., Ohsumi H., Ikeda N., Kitagawa H., Ikeda R.

Meeting abstracts of the Physical Society of Japan　58　(2)　763-763　2003/08/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Resonant x-ray scattering study on the anomalous ordered phase of PrFe_4P_<12>

Ishii K, Inami T, Murakami Y, Hao Li jie, Iwasa K, Kohgi M, Aoki Y, Sugawara H, Sato H, Imada S, Nakao H, Wakabayashi Y, Sawa H

Meeting abstracts of the Physical Society of Japan　58　(2)　429-429　2003/08/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Valence arrangement in MMX chain obtained by X-ray diffuse scattering

Wakabayashi Y, Sawa H., Kobayashi A., Kitagawa H., Ikeda R.

Meeting abstracts of the Physical Society of Japan　58　(1)　814-814　2003/03/06
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Charge and orbital ordered states in Nd_<1-x>Sr_<1+x>MnO_4 (x=0.67,0.75)

Satoh T, Nakao H, Satoh J, Murakami Y, Kubota M, Wakabayashi Y, Sawa H, Kimura T, Tokura Y

Meeting abstracts of the Physical Society of Japan　58　(1)　526-526　2003/03/06
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Quantitative determination of the atomic scattering tensor in orbitally ordered YTiO<inf>3</inf>by using a resonant x-ray scattering technique

H. Nakao, H. Nakao, H. Nakao, Y. Wakabayashi, Y. Wakabayashi, T. Kiyama, T. Kiyama, Y. Murakami, Y. Murakami, Y. Murakami, M. V. Zimmermann, J. P. Hill, Doon Gibbs, S. Ishihara, S. Ishihara, Y. Taguchi, Y. Taguchi, Y. Tokura, Y. Tokura

Physical Review B - Condensed Matter and Materials Physics　66　1844191-1844197　2002/11/01

ISSN： 0163-1829
Single-crystal x-ray diffraction studies on Pr0.65Ca0.35MnO3 and Nd0.5Sr0.5MnO3 at high pressures and low temperatures

Shimomura S, Nishimoto K, Yamanaka Y, Ogata T, Naito Y, Tajima K, Wakabayashi N, Tazaki R, Wakabayashi Y, Sawa H, Nakao H, Tomioka Y, Kuwahara H, Tokura Y

Meeting abstracts of the Physical Society of Japan　57　(2)　449-449　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Low Temperature Structure of Pyrochlore Compound Cd2Re2O7

Toda Mitsuru, Tazaki Ryoko, Wakabayashi Yusuke, Sawa Hiroshi, Hiroi Zenji

Meeting abstracts of the Physical Society of Japan　57　(2)　455-455　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Observation of Charge Ordering Structure of Cu for DCNQI2Cu system using a Resonant X-ray Diffraction Method.

Tazaki Ryoko, Wakabayashi Yusuke, Sawa Hiroshi, Kato Reizo

Meeting abstracts of the Physical Society of Japan　57　(2)　707-707　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
8pSC-10 ハロゲン架橋混合配位子複核金属錯体の構造と物性(金属錯体(MX系・MMX系など),領域7)

小林厚志, 北川宏, 池田龍一, 田崎遼子, 若林裕助, 澤博

日本物理学会講演概要集　57　(2)　709-709　2002/08/13
Publisher: 一般社団法人日本物理学会
ISSN： 1342-8349
Effect of the eg electron on the resonant x-ray scattering II : Distortion of the MnO6 octahedra in thin films

Wakabayashi Y., Sawa H., Nakamura M., Izumi M., Miyano K., Murakami Y.

Meeting abstracts of the Physical Society of Japan　57　(2)　422-422　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
X-Ray Anomalous Scattering Study on the Charge Ordering State in the Low-Temperature Phase of β-Na0.33V2O5

Muraoka J., Nagai S., Takesue N., Fujii Y., Wakabayashi Y., Sawa H., Yamauchi T., Isobe M., Yamaura J., Ueda Y.

Meeting abstracts of the Physical Society of Japan　57　(2)　420-420　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aXW-11 Coreiatioa length of CE-Type charge Otda in high dope region of Layasd Perovskitc-Type Mn Oxides La_<2-2x>Sr_<1+2x>Mn_2O_7

Sato J., Satoh T., Wakabayashi Y., Shimizu K, Hirota K, Murakami Y.

Meeting abstracts of the Physical Society of Japan　57　(1)　543-543　2002/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aXW-9 Control of orbital ordering and its observation with resonant x-ray scattering in manganites

Nakamura M., Izumi M., Ogawa N., Miyano K., Wakabayashi Y., Ohsumi H., Murakami Y

Meeting abstracts of the Physical Society of Japan　57　(1)　542-542　2002/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aXW-10 Effect of the eg electron on the resonant x-ray scattering

Wakabayashi Y., Sawa H., Nakamura M., Izumi M., Miyano K.

Meeting abstracts of the Physical Society of Japan　57　(1)　542-542　2002/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pYK-8 Study of the Verwey Transition and the Low Temperture Structure for Magnetite (Fe_3O_4)using Synchrotron X-ray Radiation

Tazaki Ryoko, Sawa Yusuke, Wakabayashi Hiroshi, Kato Kenichi, Takata Masaki, Kohn Keiichiro, Mori Ryosuke, Shiratori Kiichi

Meeting abstracts of the Physical Society of Japan　57　(1)　601-601　2002/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pYK-6 Resonant X-ray Scattering Study of Orbital Ordering Antifenomagnet KCuF_3

Kakiuchi T., Sawa H., Wakabayashi Y., Nakao H., Itoh S., Murakami Y., Yamaura J., Siratori.K .K

Meeting abstracts of the Physical Society of Japan　57　(1)　600-600　2002/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pYJ-3 Low Temperature Structure of pyroclore oxide Cd_2Re_2O_7

Sawa H., Tazaki R., Wakabayashi Y., Kato K., Takata M., Hanawa M., Hiroi Z.

Meeting abstracts of the Physical Society of Japan　57　(1)　561-561　2002/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Observation of the antiferroquadrupolar order in DyB<inf>2</inf>C<inf>2</inf>by resonant x-ray scattering

T. Matsumura, N. Oumi, K. Hirota, H. Nakao, Y. Murakami, Y. Wakabayashi, T. Arima, S. Ishihara, Y. Endoh

Physical Review B - Condensed Matter and Materials Physics　65　944201-9442011　2002/03/01

ISSN： 0163-1829
Stractural Phase Transition in Pyrochlore Compound Cd₂Re₂O₇

M. Toda, Y. Wakabayashi, R. Tazaki, H. Sawa, H. Kimura, Y. Noda, Z. Hiroi

Activity Report on Neutron Scattering Research　9　155-155　2002
Quantitative determination of the atomic scattering tensor in orbitally ordered (formula presented) by using a resonant x-ray scattering technique

H. Nakao, Y. Wakabayashi, T. Kiyama, Y. Murakami, M. V. Zimmermann, J. P. Hill, Doon Gibbs, S. Ishihara, Y. Taguchi, Y. Tokura

Physical Review B - Condensed Matter and Materials Physics　66　(18)　1-7　2002

DOI： 10.1103/PhysRevB.66.184419 　

ISSN： 1550-235X 1098-0121
Anomaly in Resonant X-ray Scattering Intensity of Orbital Ordering Ferromagnet K_2CuF_4 at Low Temperature

Kakiuchi T, Sawa H, Wakabayashi Y, Nakao H, Itoh S, Murakami Y, Yamaura J, Siratori K

Meeting abstracts of the Physical Society of Japan　56　(2)　509-509　2001/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
P-T Phase Diagram of Molecular Conductor (DI-DCNQI)_2Cu

Nakabe K, Tazaki R, Wakabayashi Y, Sawa H, Nakao H, Murakami Y, Kato R

Meeting abstracts of the Physical Society of Japan　56　(2)　699-699　2001/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Resonant x-ray-scattering study of octahedral tilt ordering in LaMnO3 and Pr1-xCaxMnO3

M. V. Zimmermann, C. S. Nelson, Y. J. Kim, J. P. Hill, Doon Gibbs, H. Nakao, Y. Wakabayashi, Y. Murakami, Y. Tokura, Y. Tomioka, T. Arima, C. C. Kao, D. Casa, C. Venkataraman, Th. Gog

Physical Review B - Condensed Matter and Materials Physics　64　(6)　644111-644119　2001/08/01

DOI： 10.1103/PhysRevB.64.064411 　

ISSN： 0163-1829
Orbital and charge ordering in La1-cursive greek chiSr1+cursive greek chiMnO4 (0.4 ≤ cursive greek chi ≤ 0.5)

Yusuke Wakabayashi, Youichi Murakami, Yutaka Moritomo, Ichiro Koyama, Hironori Nakao, Takashi Kiyama, Tsuyoshi Kimura, Yoshinori Tokura, Nobuyoshi Wakabayashi

Journal of the Physical Society of Japan　70　(5)　1194-1197　2001/05
Publisher: 社団法人日本物理学会
DOI： 10.1143/JPSJ.70.1194 　

ISSN： 0031-9015
Resonant X-ray Scattering in LaMnO_3

Nakao H, Murakami Y, Wakabayashi Y, Kiyama T, Zimmermann M. v, Hill J. P, Gibbs D, Tokura Y

Meeting abstracts of the Physical Society of Japan　56　(1)　451-451　2001/03/09
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
X-ray and neutron scattering of orbital ordering in La_<1-x>Sr_xMnO_3(x≥0.14)

Koganei Y, Matsumura T, Hirota K, Wakabayashi Y, Nakao H, Murakami Y

Meeting abstracts of the Physical Society of Japan　56　(1)　452-452　2001/03/09
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Phase Transition of Na_<0.99>V_2O_5 at Low Temperature under High Pressure

Katsuki Y., Ohwada K., Fujii Y., Takesue N., Nakao H., Isobe M., Ueda Y., Itoh K., Amemiya Y., Wakabayashi Y., Murakami Y., Fujihisa Y., Aoki K.

Meeting abstracts of the Physical Society of Japan　55　(2)　536-536　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Orbital Ordering of La_<1/2>Sr_<1/2>MnO_3 Thin Films Observed by Resonant X-ray Scattering

Ohsumi H, Murakami Y, Nakao H, Kubota M, Wakabayashi Y, Izumi M, Konishi Y, Kawasaki M, Tokura Y

Meeting abstracts of the Physical Society of Japan　55　(2)　529-529　2000/09/10
Publisher: The Physical Society of Japan (JPS)
DOI： 10.1143/JPSJ.69.2731 　

ISSN： 1342-8349
Critical phenomenon on a helical magnet, β-MnO_2

Sato Hirohiko, Wakiya Koji, Fujii Satoru, Enoki Toshiaki, Kiyama Takashi, Wakabayashi Yusuke, Nakao Hironori, Murakami Youichi

Meeting abstracts of the Physical Society of Japan　55　(2)　423-423　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Observation of Ferro-Orbital Ordering in Nd_<0.456gt;Sr_<0.55>MnO_3 by Resonant X-ray Scattering

Kubota M, Ohsumi H, Wakabayashi Y, Nakao H, Murakami Y, Arima T

Meeting abstracts of the Physical Society of Japan　55　(2)　528-528　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Resonant X-ray Scattering of La_<0.45>Sr_<0.55>MnO_3/La_<0.6>Sr_<0.4>MnO_3 Superlattices : Observation of Orbital Superlattice

Kiyama T, Nakao H, Wakabayashi Y, Murakami Y, Izumi M, Kawasaki M, Tokura Y

Meeting abstracts of the Physical Society of Japan　55　(2)　529-529　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
"Devil's Staircase" Type Phase Trasition of NaV_2O_5 under High Pressure

Ohwada K, Nakao H, Katsuki Y, Takesue N, Fujii Y, Isobe M, Ueda Y, Itoh K, Amemiya Y, Wakabayashi Y, Murakami Y, Fujihisa Y, Aoki K, Shoubu T, Noda Y, Ikeda N

Meeting abstracts of the Physical Society of Japan　55　(2)　536-536　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Quadrupole ordering of CeB_6 studied by Resonant X-ray Scattering

Nakao H, Magishi K, Wakabayashi Y, Murakami Y, Koyama K, Hirota K, Endo Y, Kunii S

Meeting abstracts of the Physical Society of Japan　55　(2)　538-538　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Resonant X-ray scattering study on the phase IV of HoB_2C_2

Matsumura T, Oumi N, Hirota K, Endo Y, Wakabayashi Y, Nakao H, Murakami Y

Meeting abstracts of the Physical Society of Japan　55　(2)　541-541　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Observation of magnetic structure of β-MnO_2 by x ray magnetic scattering

Sato Hirohika, Wakiya Koji, Enoki Toshiaki, Kiyama Takashi, Wakabayashi Yusuke, Nakao Hironori, Murakami Youichi

Meeting abstracts of the Physical Society of Japan　55　(1)　458-458　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Superlattice Structural Analysis of Li_<1+x>Mn_<2-x>O_4

Oka S., Arima T., Omori T., Nakazawa A., Nogutchi M., Wakabayashi Y., Murakami Y.

Meeting abstracts of the Physical Society of Japan　55　(1)　458-458　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Lattice distortion and charge ordering in (Nd_<0.25>Sm_<0.75>)_<0.5>Sr_<0.5>MnO_3

Torashima K., Shimomura S., Ohtsuka H., Tajima K., Wakabayashi N., Wakabayashi Y., Murakami Y., Kuwahara H., Tokura Y.

Meeting abstracts of the Physical Society of Japan　55　(1)　427-427　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Orbital orderings in YVO _3 II

Noguchi M., Nakazawa A., Oka S., Arima T., Wakabayashi Y., Murakami Y.

Meeting abstracts of the Physical Society of Japan　55　(1)　383-383　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Orbital Ordering of YTiO_3 Observed by Resonant X-ray Scattering

Nakao H, Murakami Y, Wakabayashi Y, Kiyama T, Zimmermann M. v, Hill J. P, Gibbs D, Taguchi K, Tokura Y

Meeting abstracts of the Physical Society of Japan　55　(1)　533-533　2000/03/10
Publisher: The Physical Society of Japan (JPS)
DOI： 10.1143/JPSJ.69.2731 　

ISSN： 1342-8349
Hole concentration dependence of the charge and orbital ordering in La_<1-x>Sr_<1+x>MnO_4(0.4<__-x<__-0.5)

Wakabayashi Y, Murakami Y, Nakao H, Kiyama T, Koyama I, Moritomo Y, Kimura T, Tokura Y

Meeting abstracts of the Physical Society of Japan　55　(1)　428-428　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Observation of the Antiferro-Quadrupolar Ordering in DyB_2C_2 by Resonant X-ray Scattering

Matsumura T, Oumi N, Hirota K, Endo Y, Wakabayashi Y, Nakao H, Murakami Y

Meeting abstracts of the Physical Society of Japan　55　(1)　443-443　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Observation of Orbital Ordering in La_<1-x>Sr_xMnO_3(x=0.08, 0.13)

koganei Y, Takahashi K, Fukuda T, hirota K, Endou Y, Nakao H, Kiyama T, Wakabayashi Y, Murakami Y

Meeting abstracts of the Physical Society of Japan　55　(1)　481-481　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Synchrotron x-ray-diffraction study of orbital ordering in YVO₃

M. Noguchi, A. Nakazawa, S. Oka, T. Arima, Y. Wakabayashi, H. Nakao, Y. Murakami

Phys. Rev. B　62　(14)　R9271-R9274　2000

DOI： 10.1103/PhysRevB.62.R9271 　

ISSN： 0163-1829
26aR-6 Orbital ordering in YVO_3

Noguchi M, Nakazawa A, Arima T, Wakabayashi Y, Murakami Y

Meeting abstracts of the Physical Society of Japan　54　(2)　391-391　1999/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26pE-12 Time evolution photogrowth and decay of midgap states-MX chain compound

Nishida M., Kuroda N., Wakabayashi Y., Wakabayashi N.

Meeting abstracts of the Physical Society of Japan　54　(2)　762-762　1999/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aYQ-2 Discovery of new phases of NaV_2O_5 under low temperature and high pressure

Ohwada K, Nakao H, Nakatogawa H, Takesue N, Fujii Y, Isobe M, Ueda Y, Wakabayashi Y, Murakami Y

Meeting abstracts of the Physical Society of Japan　54　(2)　432-432　1999/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
24pJ-5 Orbital Ordering in La_<1-x>Sr_xMnO_3 : I.Direct Observations by Synchrotron X-ray Diffraction

Fukuda T, Hirota K, Takahashi K, Murakami Y, Wakabayashi Y, Nakao H, Endo Y

Meeting abstracts of the Physical Society of Japan　54　(2)　475-475　1999/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pG-12 X-ray Anomalous Scattering from NaV_2O_5

Nakao H, Ohwada K, 仲戸川博人, Takesue N, Fujii Y, Zimmermann M.v, Hill J.P, Gibbs D, Woicik J.C, Wakabayashi Y, Murakami Y, Isobe M, Ueda Y

Meeting abstracts of the Physical Society of Japan　54　(2)　507-507　1999/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28p-C-6 Research of charge and orbital ordering in LaSr_2Mn_2O_7 by resonant x-ray scattering technique II.

Wakabayashi Y., Murakami Y., Koyama I, Kimura T, Tokura Y, Moritomo Y, Hirota K, Endoh Y

Meeting abstracts of the Physical Society of Japan　54　(1)　544-544　1999/03/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28p-C-15 Synchrotron x-ray study of charge ordering of La_<δ/3>Sr<1/3>NiO_4

Nakazawa A., Nakamura K., Arima T., Wakabayashi Y., Murakami Y.

Meeting abstracts of the Physical Society of Japan　54　(1)　546-546　1999/03/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
30p-F-3 Lattice dimerization behaveior of NaV_2O_5 under high pressure

Ohwada K, Nakano H, Nakatogawa H, Takesue N, Fujii Y, Isobe M, Ueda Y, Wakabayashi Y, Murakami Y

Meeting abstracts of the Physical Society of Japan　54　(1)　472-472　1999/03/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Polarization-dependent resonant-x-ray diffraction in charge- and orbital-ordering phase of Nd_1/2Sr_1/2MnO₃

K. Nakamura, T. Arima, A. Nakazawa, Y. Wakabayashi, Y. Murakami

Phys. Rev. B　60　(4)　2425-2428　1999

DOI： 10.1103/PhysRevB.60.2425 　

ISSN： 0163-1829
Direct observation of charge ordering on La_<1-x>Sr_xMnO_3 using x-ray anomalous scattering

INAMI T., IKEDA N., MURAKAMI Y., KOYAMA I., WAKABAYASHI Y., YAMADA Y.

Meeting abstracts of the Physical Society of Japan　53　(2)　724-724　1998/09/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Synchrotron x-ray study of charge and orbital-ordering of Nd_<0.5>Sr_<0.5>MnO_3

NAKAMURA K., NAKAZAWA A., ARIMA T., WAKABAYASHI Y., MURAKAMI Y.

Meeting abstracts of the Physical Society of Japan　53　(2)　725-725　1998/09/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Temperature Dependence of Charge Ordering in LA_<0.5>Sr_<1.5>MnO_4

KOYAMA I., MURAKAMI Y., WAKABAYASI Y., ARIMA T., MORITOMO Y., KIMURA T., TOKURA Y.

Meeting abstracts of the Physical Society of Japan　53　(2)　618-618　1998/09/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Research of charge and orbital ordering in LaSr_2Mn_2O_7 by resonant x-ray scattering technique.

WAKABAYASHI Y., MURAKAMI Y., KOYAMA I., KIMURA T., TOKURA Y., MORITOMO Y., HIROTA K., ENDOH Y., WAKABAYASHI N.

Meeting abstracts of the Physical Society of Japan　53　(2)　694-694　1998/09/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Pressure Effect on NaV_2O_5

OHWADA K, NAKAO H, TAKASUE N, FUJII Y, ISOBE M, UEDA U, WAKABAYASHI Y, MURAKAMI Y

Meeting abstracts of the Physical Society of Japan　53　(2)　482-482　1998/09/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
X-ray diffuse scattering from [Pt(en)_2][Pt(en)_2I_2](CF_3SO_3)_4

WAKABAYASHI Yusuke, WAKABAYASHI Nobuyoshi, MATUSHITA Nobuyuki

Meeting abstracts of the Physical Society of Japan　53　(1)　203-203　1998/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
8a-G-6 X-ray diffuse scattering from Ni_<1-x>Pd_x(chxn)_2Br_3

Wakabayashi Yusuke, Wakabayashi Nobuyoshi, Manabe Toshio, Yamashita Masahiro

Meeting abstracts of the Physical Society of Japan　52　(2)　248-248　1997/09/16
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
31a-YC-1 Decay and equillbration of photoinduced A band states in a PtCl chain compound

Wakabayashi Y, Wakabayashi N, Kuroda N, Mastushita N, Yamashita M

Meeting abstracts of the Physical Society of Japan　52　(1)　238-238　1997/03/17
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28p-P-9 Magnetic ordering and lattice modulation in DyZn_2

Wakabayashi Yusuke, Wakabayashi Nobuyoshi, Kitai Tetsuo

Meeting abstracts of the Physical Society of Japan　52　(1)　441-441　1997/03/17
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
3a-Y-7 Structural and optical studies on [Pt(en)_2][Pt(en)_2Cl_2](BF_4)_4 at low temperatures

Wakabayashi Y, Wakabayashi N, Nishida M, Matsushita N, Kuroda N

Abstracts of the meeting of the Physical Society of Japan. Annual meeting　51　(2)　290-290　1996/03/15
Publisher: The Physical Society of Japan (JPS)

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Books and Other Publications 4

Solid state physics based on crystal structure

Yusuke Wakabayashi

2017/09

ISBN: 9784621301951
3D Local Structure and Functionality Design of Materials

W. Voegeli, Y. Wakabayashi

World Scientific Publishing　2018
Introduction to functional materials science

H.Daimon, Y.Sasaki

2016/07

ISBN: 9784621300602
Fundamentals of Picoscience

Y. Wakabayashi

CRC press　2013/09

ISBN: 9781466505094

Presentations 5

Bayesian Analysis on Surface X-Ray Diffraction Data and its application to a water splitting catalyst Invited

Y. Wakabayashi

12th International Conference on Materials for Advanced Technologies　2025/07/02
Surface structure of (La,Sr)CoO$_3$ film under electrochemical conditions

Y.Wakabayashi, A.Fujisawa, X.Xu, Y.Ishii, H.Shimotani, Y.Inoue, Y.Miyahara, K.Miyazaki

17th International Conference on Surface X-ray and Neutron Scattering (SXNS17)
鉄の酸化被膜形成過程微弱信号の解析による高時間分解能計測 Invited

若林裕助

日本放射光学会
情報科学を用いた薄膜試料における表面・界面状態の放射光解析 Invited

若林裕助

第410回物性談話会(名古屋大学工学研究科)　2020/09/25
Early process of iron oxidation revealed by time resolved x-ray reflectometry Invited

Yusuke Wakabayashi

The 2nd Annual Symposium in the Tokyo Tech-UCL-McGill Core-to-Core collaboration, Defect Functionalized Sustainable Energy Materials: From Design to Devices Application　2020/02/18

Research Projects 19

Atomic scale visualization of the active sites of oxide catalysis

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2022/04/01 - 2026/03/31
Development of Anion GICs Using Highly Concentrated Aqueous Solutions and Their Application to Energy Storage Devices

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Kyoto University

2020/04/01 - 2023/03/31
Research and Development of Aqueous Solutions with Wide Potential Windows for Rechargeable Batteries

Miyazaki Kohei

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Kyoto University

2017/04/01 - 2020/03/31

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In order to improve the safety of rechargeable batteries, water-based rechargeable batteries using an aqueous solution as an electrolyte have been investigated, but the problem is that the potential range for stable operation is known to be narrow. In this study, we used the addition of organic sulfonates to elucidate the expansion of the potential window of aqueous electrolytes and the mechanism of their expression. An enlarged potential window was found for multiple organic sulfonates, confirming that this is a universal phenomenon. The present findings provide a new perspective that the degradation resistance of aqueous solutions can be improved by controlling the local ion concentration and structure near the electrode, which is beneficial from the viewpoint of device applications.
Construction of oversea base and international network for 3D active site science

DAIMON Hiroshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Institution: Nara Institute of Science and Technology

2015/11/06 - 2019/03/31

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In order to spread the advanced Japanese science and technology based on the 3D-active-site science to the world, we actively promoted the appeal of achievement results through organizing the international workshop and the publications of English textbooks and special issues in international journals. We supported our young researchers actively collaborating abroad for a long term and inviting overseas researchers to our groups. We promoted the foundation of overseas researcher community with a deep understanding of the concept and significance of this field. As a result, a joint research network based on large-scale advanced synchrotron radiation facilities and overseas research institutes was established.
Supervision and research support by platform construction of 3D active-site science

DAIMON Hiroshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Institution: Nara Institute of Science and Technology

2014/07/10 - 2019/03/31

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By preparing a high-level experimental environment, and supporting application and analysis of synchrotron research, we activated the research and collaboration among members. By conducting many results briefing sessions, symposia, outreach activities, site visits, etc., we enhanced mutual understanding and many collaborations in fusion area. Our advanced knowledge was spread to the world through the special issue of English magazines and the publication of Japanese and English textbooks. We have fostered many young scientists by giving spring school and poster awards and subsidizing travel expenses for international conferences. These were widely spread through the issuance of Japanese and English domain homepages and News Letter. As a result, we were able to create the science of atomic arrangement around isolated active atoms, which is important for the functional advanced materials in Japan.
Surface/interface 3D atomic imaging by CTR scattering

Wakabayashi Yusuke, Takahasi Masamitsu, WolfgangVoegeli, Hattori Ken

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Institution: Osaka University

2014/07/10 - 2019/03/31

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There are various phenomena activated by the surfaces or interfaces. We have studied surface or interface structures by means of the crystal truncation rod (CTR) scattering method, one of the surface diffraction techniques. Technical improvement for the static structure we achieved allowed us to examine the surface/interface structures of various organic semiconductors and oxides. Time resolved instruments were also developed, 100 ps resolution reflection high energy electron diffraction streak camera and 100 ms resolution simultaneous multiple angle-wavelength dispersive X-ray reflectometer. Using them, we have clarified the reaction mechanisms of TiO2 opto-catalytic reaction and fuel-cell reactions at the Pt surface.
Structural study on external voltage control of physical properties

Wakabayashi Yusuke

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Osaka University

2014/04/01 - 2018/03/31

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In order to understand the process of external control of magnetic/transport properties of materials, we have performed non-contact measurements of interfacial structures of various functional materials. Cobalt ultrathin films, which vary their Curie temperature by applied electric voltage, shows no structural change caused by the voltage. In contrast, the self assembled monolayers on electrode changes their conformation. Such structural switching caused by the external voltage is used for the control of the work function of the electrode with respect to the HOMO level of the organic semiconductor to reduce the contact resistivity. In the course of this study, we have developed a new method of the surface structure analysis based on the informatics, which helps future studies a lot.
Exploration for new magnetoelectrics with high performance

Kimura Tsuyoshi, WAKABAYASHI YUSUKE, KIMURA KENTA, TANAKA YOSHIKAZU

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: Osaka University

2012/04/01 - 2017/03/31

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The purpose of this study was to construct new coupled electronic properties related to magnetism with low energy loss in magnetic insulators. In particular, we focused on magnetoelectric phenomena such as electric-field control of magnetism. The followings are examples of the achievements: (1) non-volatile electric-field control of magnetism at room temperature in magnetoelectric hexaferrites, (2) construction of a new glass state called “toroidal glass” and its demonstration through magnetoelectric effect, (3) construction of enantiomerism for electric quadrupole order, and (4) enhancement of magnetically-induced electric polarization by applying high pressure.
Interface structure of organic transistors

WAKABAYASHI Yusuke

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (A)

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

Institution: Osaka University

2011/11/18 - 2014/03/31

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Current technology to fabricate electronic devices is based on Si. However, recent study revealed that organic semiconductors can be utilized for making devices with totally different characteristics, such as lightweight, flexible devices. In this study, we performed structural study of interfaces to improve organic devices. High resolution, non-destructive measurements of interfaces were realized by using surface synchrotron X-ray diffraction technique. We clarified two interface structures; one is the surface structure of organic semiconductor tetracene, and the other is the electric double layer structure made of ionic liquid. The latter includes applied electric voltage dependence of the structure. Layered arrangement of the anions/cations was observed, and the ionic arrangement was controlled by the applied voltage.
Correlation between magnetic and dielectric properties

KIMURA Tsuyoshi, WAKABAYASHI Yusuke, NAMURA Hiroyuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

Institution: Osaka University

2008 - 2011

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We have succeeded in developing various new multiferroics and magnetoelectric coupled phenomena. Among these achievements, one of the most striking results is the discovery of a low-field magnetoelectric effect at room temperature in a Z-type hexaferrite. We firstly demonstrate the magnetic control of ferroelectric polarization up to about 400 Kelvin.
Frustration and Relaxors

OHWADA Kenji, MORI Shigeo, NOGUCHI Yuji, OHWADA Kenji, WAKABAYASHI Yusuke, MATSUURA Masato, TOMITA Yusuke, SODA Minoru, KONDO Tadashi, NOGUCHI Yuji, TOMITA Yusuke, SODA Minoru

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Priority Areas

Category: Grant-in-Aid for Scientific Research on Priority Areas

2007 - 2011

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The research program “Frustration and Relaxors” is one of the research projects of the Grant-in-Aid for Scientific Research on Priority Areas “Novel States of Matter Induced by Frustration”. We developed new relaxor materials including lead-free ferroelectrics, clarified wide time-space structure in relaxor ferroelectrics, and proposed a minimal model for describing the range from the relaxor to the ferroelectrics. Therefore, our research made an important contribution to the basic research in relaxor systems and provided a new viewpoint to the conventional research field in frustrated systems.
エックス線共鳴磁気散乱法を用いたスピンホール効果の観測

柳原英人, 喜多英治, 若林裕助, 水牧仁一朗

Offer Organization: 日本学術振興会

System: 科学研究費助成事業挑戦的萌芽研究

Category: 挑戦的萌芽研究

Institution: 筑波大学

2009 - 2010

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エピタキシャル人工格子とX線共鳴磁気散乱を組み合わせた回折実験をもちいて、スピンホール効果に伴うスピン蓄積の直接観測を目指した。21年度には、エピタキシャル人工格子としてPtと絶縁材料の組み合わせで良好な膜成長が得られる材料探索と,成長条件の最適化をおこない、MgO(001)基板上に良質なPt/γ-Al_2O_3(001)の組み合わせがエピタキシャルに成長することを見出した。当該年度は高輝度光科学研究センターBL39XUにおいて、X線共鳴磁気散乱による回折実験を行った。PtおよびAl_2O_3の設計膜厚は、それぞれ5nm、1nmとし、これを30周期分積層した。この薄膜を幅約1mm長さ、0.5mmに加工し、電流を印加した。室温においてPtのL_<II>共鳴端E=11.56keVの円偏光を入射し、同時にf=1kHz、振幅3Aの交流電流を印加し、PINフォトダイオードをディテクタに用いて実験を行った。回折条件を1次の超格子反射(n=1)に合わせて、fおよび2fのロックイン検波を行った。I_<AC>=3Aの超格子反射の強度は非常に弱く、AC信号/DC信号比が10^<-6>であった。12時間積分したが、電流により誘起されたスピン蓄積に対応する信号は、有意な大きさではなかった。期待された結果が得られなかった理由として、印加電流が小さく電流密度を稼げなかったことと、本質的に今回用いたPtのLII付近のX線は、その侵入長が非常に長く、薄膜試料では入射光のほとんどすべてが膜と相互作用することなく透過してしまうことが挙げられる。
Photo irradiation effect on transition metal oxide thin films

WAKABAYASHI Yusuke

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

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

Institution: Osaka University

2009 - 2010

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The atomic scale structures of manganese oxide thin films have been studied by means of synchrotron x-ray diffraction. While the main target of our study was the film exhibiting a photo-induced metal-insulator switching, the sample was too unstable to obtain reliable results. Instead, the technique of the structure determination of film system was improved and the difference in metallic and insulating films has been clarified.
放射光を用いたX線散漫散乱・共鳴散乱による擬一次元金属錯体の電荷秩序構造の研究

若林裕助

Offer Organization: 日本学術振興会

System: 科学研究費助成事業若手研究(B)

Category: 若手研究(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

2005 - 2005
Electronic states of surface, interface, and thin films of transition metal oxide Competitive

System: Cooperative Research

2005 -
強相関系表面・薄膜の電子軌道状態 Competitive

System: 共同研究

2005 -
低次元錯体中における価数配列 Competitive

System: 共同研究

2003 -
マンガン酸化物の電荷,軌道秩序

若林裕助

Offer Organization: 日本学術振興会

System: 科学研究費助成事業特別研究員奨励費

Category: 特別研究員奨励費

Institution: 慶應義塾大学

2000 - 2000
表面における構造物性 Competitive

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Teaching Experience 5

物性物理学I　東北大学理学部
力学　東北大学理学部・工学部
熱力学　東北大学理学部
電磁気学　大阪大学基礎工学部
物性概論　大阪大学基礎工学研究科