Y
Yuichi Shimakawa
Researcher at Kyoto University
Publications - 490
Citations - 13534
Yuichi Shimakawa is an academic researcher from Kyoto University. The author has contributed to research in topics: Perovskite (structure) & Antiferromagnetism. The author has an hindex of 55, co-authored 460 publications receiving 11970 citations. Previous affiliations of Yuichi Shimakawa include Kurashiki University of Science and the Arts & Argonne National Laboratory.
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Journal ArticleDOI
Blue-light emission at room temperature from Ar + -irradiated SrTiO 3
Daisuke Kan,Takahito Terashima,Ryoko Kanda,Atsunobu Masuno,Kazunori Tanaka,Shucheng Chu,Hirofumi Kan,Atsushi Ishizumi,Yoshihiko Kanemitsu,Yoshihiko Kanemitsu,Yuichi Shimakawa,Mikio Takano +11 more
TL;DR: In this paper, the authors report on blue-light emission at room temperature from Ar+-irradiated, metallic SrTiO3 (STO) and propose a model by which the doped conduction electrons and the in-gap state produce a radiative process that results in blue light emission.
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Crystal structures and ferroelectric properties of SrBi2Ta2O9 and Sr0.8Bi2.2Ta2O9
TL;DR: In this paper, the crystal structures of ferroelectric materials of stoichiometric SrBi2Ta2O9 and Sr-deficient-and-Bi-excess Sr0.8Bi2.0 were refined by neutron powder diffraction.
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Designed ferromagnetic, ferroelectric Bi(2)NiMnO(6).
TL;DR: A newly designed ferromagnetic, ferroelectric compound, Bi(2)NiMnO(6), was prepared by high-pressure synthesis at 6 GPa as mentioned in this paper.
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Colossal negative thermal expansion in BiNiO3 induced by intermetallic charge transfer
Masaki Azuma,Masaki Azuma,Wei-Tin Chen,Wei-Tin Chen,Hayato Seki,Michal Czapski,Smirnova Olga,Kengo Oka,Kengo Oka,Masaichiro Mizumaki,Tetsu Watanuki,Naoki Ishimatsu,Naomi Kawamura,Shintaro Ishiwata,Shintaro Ishiwata,Matthew G. Tucker,Yuichi Shimakawa,J. Paul Attfield +17 more
TL;DR: It is reported that colossal negative thermal expansion (defined as linear expansion <−10−4 K−1 over a temperature range ~100 K) is accessible in perovskite oxides showing charge-transfer transitions.
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Crystal structure and ferroelectric properties of A Bi 2 Ta 2 O 9 ( A = Ca , Sr, and Ba)
TL;DR: In this article, a series of Bi-layered compounds with orthorhombic distortion and relaxor-type ferroelectric properties were investigated, and the properties of these compounds were investigated at the macroscopic scale.