Goro Shibata
University of Tokyo
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Publication
Featured researches published by Goro Shibata.
Journal of Applied Physics | 2013
V. R. Singh; V. K. Verma; K. Ishigami; Goro Shibata; Y. Yamazaki; Atsushi Fujimori; Yukiharu Takeda; Tetsuo Okane; Y. Saitoh; Hiroshi Yamagami; Yoshitaka Nakamura; Masaki Azuma; Yuichi Shimakawa
BiFeO3 (BFO) shows both ferroelectricity and magnetic ordering at room temperature, but its ferromagnetic component, which is due to spin canting, is negligible. Substitution of transition-metal atoms such as Co for Fe is known to enhance the ferromagnetic component in BFO. In order to reveal the origin of such magnetization enhancement, we performed soft x-ray absorption spectroscopy (XAS) and soft x-ray magnetic circular dichroism (XMCD) studies of BiFe1−xCoxO3 (x = 0 to 0.30) (BFCO) thin films grown on LaAlO3(001) substrates. The XAS results indicated that the Fe and Co ions are in the Fe3+ and Co3+ states. The XMCD results showed that the Fe ions show ferromagnetism, while the Co ions are antiferromagnetic at room temperature. The XAS and XMCD measurements also revealed that part of the Fe3+ ions are tetrahedrally co-ordinated by oxygen ions but that the XMCD signals of the octahedrally coordinated Fe3+ ions increase with Co content. The results suggest that an impurity phase such as the ferrimagnetic...
Physical Review B | 2013
Hiromichi Suzuki; T. Yoshida; S. Ideta; Goro Shibata; K. Ishigami; T. Kadono; Atsushi Fujimori; Makoto Hashimoto; D. H. Lu; Z.-X. Shen; K. Ono; Enju Sakai; Hiroshi Kumigashira; M. Matsuo; T. Sasagawa
We have studied the electronic structure of Ba(Fe
Physical Review B | 2015
K. Ishigami; Kohei Yoshimatsu; D. Toyota; M. Takizawa; T. Yoshida; Goro Shibata; T. Harano; Yu Takahashi; T. Kadono; V. K. Verma; Vijay Singh; Yukiharu Takeda; Tetsuo Okane; Y. Saitoh; Hiroshi Yamagami; Tsuneharu Koide; M. Oshima; Hiroshi Kumigashira; A. Fujimori
{}_{1\ensuremath{-}x}
Physical Review B | 2015
Hiromichi Suzuki; Kun Zhao; Goro Shibata; Yu Takahashi; Shoya Sakamoto; Kohei Yoshimatsu; Bijuan Chen; Hiroshi Kumigashira; F. H. Chang; H. J. Lin; D. J. Huang; C. T. Chen; Bo Gu; Sadamichi Maekawa; Y. J. Uemura; C. Q. Jin; A. Fujimori
Mn
Physical Review B | 2014
K. Takubo; Riccardo Comin; D. Ootsuki; T. Mizokawa; H. Wadati; Youtarou Takahashi; Goro Shibata; A. Fujimori; Ronny Sutarto; F. He; Sunseng Pyon; Kazutaka Kudo; Minoru Nohara; G. Levy; I. S. Elfimov; G. A. Sawatzky; A. Damascelli
{}_{x}
Physical Review B | 2014
Goro Shibata; Kohei Yoshimatsu; Enju Sakai; Vijay Singh; V. K. Verma; K. Ishigami; T. Harano; T. Kadono; Yukiharu Takeda; Tetsuo Okane; Y. Saitoh; Hiroshi Yamagami; Akihito Sawa; Hiroshi Kumigashira; Masaharu Oshima; Tsuneharu Koide; Atsushi Fujimori
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EPL | 2014
Yoshinori Takahashi; Vk K. Verma; Goro Shibata; T. Harano; K. Ishigami; Kohei Yoshimatsu; T. Kadono; Atsushi Fujimori; A. Tanaka; Fh-H. Chang; Hj-J. Lin; Dj J. Huang; Ct T. Chen; Banabir Pal; D. D. Sarma
{}_{2}
Physical Review B | 2017
Yuki K. Wakabayashi; Yosuke Nonaka; Yukiharu Takeda; Shoya Sakamoto; Keisuke Ikeda; Zhendong Chi; Goro Shibata; A. Tanaka; Y. Saitoh; Hiroshi Yamagami; Masaaki Tanaka; Atsushi Fujimori; Ryosho Nakane
As
Applied Physics Letters | 2013
T. Harano; Goro Shibata; K. Ishigami; Y. Takashashi; V. K. Verma; Vijay Singh; T. Kadono; Atsushi Fujimori; Yukiharu Takeda; Tetsuo Okane; Y. Saitoh; Hiroshi Yamagami; Tsuneharu Koide; Hiroshi Yamada; Akihito Sawa; Masashi Kawasaki; Y. Tokura; A. Tanaka
{}_{2}
Physical Review B | 2014
Yukio Takahashi; T. Kadono; S. Yamamoto; Vijay Singh; V. K. Verma; K. Ishigami; Goro Shibata; T. Harano; Yukiharu Takeda; Tetsuo Okane; Y. Saitoh; Hiroshi Yamagami; M. Takano; A. Fujimori
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