K
Kichizo Asai
Researcher at University of Electro-Communications
Publications - 84
Citations - 1789
Kichizo Asai is an academic researcher from University of Electro-Communications. The author has contributed to research in topics: Magnetization & Spin states. The author has an hindex of 21, co-authored 84 publications receiving 1712 citations.
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Two Spin-State Transitions in LaCoO 3
TL;DR: In this paper, a new anomalous thermal lattice expansion of LaCoO 3 near 500 K was revealed, which indicates the existence of a second spin state transition, in addition to the one previously established near 100 K. The model parameters indicate that the initially large energy difference between IS and HS states decreases towards zero as the second transition proceeds.
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Neutron-scattering study of the spin-state transition and magnetic correlations in La1-xSrxCoO3 (x=0 and 0.08)
Kichizo Asai,Osamu Yokokura,Nobuhiko Nishimori,Henry Chou,John M. Tranquada,Gen Shirane,Sadao Higuchi,Yuichiro Okajima,Kay Kohn +8 more
TL;DR: The results suggest that the magnetic moments in the doped compound freeze into a spin-glass state at low temperature, indicating that the high-temperature transition is not dominantly magnetic in origin.
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Temperature-induced magnetism in LaCoO 3
TL;DR: This is the first concrete experimental evidence for the temperature-induced magnetic moment of Co ions in this oxide as proposed in the thermally populated high-spin model.
Journal ArticleDOI
Pressure Dependence of the 100 K Spin-State Transition in LaCoO3.
Kichizo Asai,Osamu Yokokura,Masaru Suzuki,Takashi Naka,Takehiko Matsumoto,Hiroki Takahashi,Nobuo Môri,Kay Kohn +7 more
TL;DR: In this article, the authors investigated the pressure dependence of the 100 K spin-state transition in LaCoO 3 through magnetization measurement under pressures of up to 18.2 kbar.
Journal ArticleDOI
Magnetic properties of REMe0.5Mn0.5O3 (RE = Rare Earth Element, Me = Ni, Co)
Kichizo Asai,Kouji Fujiyoshi,Nobuhiko Nishimori,Yasumasa Satoh,Yoshihiko Kobayashi,Moriji Mizoguchi +5 more
TL;DR: In this article, the Curie temperature of rare earth (RE) elements was investigated and it was shown that the magnetic moments of these elements allign ferromagnetically in a low temperature region, typically below 30 K.