Two Spin-State Transitions in LaCoO<sub><b>3</b></sub>
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- Asai Kichizo
- Department of Applied Physics and Chemistry, The University of Electro–Communications, Chofu, Tokyo 182
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- Yoneda Atsuro
- Department of Applied Physics and Chemistry, The University of Electro–Communications, Chofu, Tokyo 182
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- Yokokura Osamu
- Department of Applied Physics and Chemistry, The University of Electro–Communications, Chofu, Tokyo 182
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- Tranquada J. M.
- Brookhaven National Laboratory, Upton, New York 11973, USA
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- Shirane G.
- Brookhaven National Laboratory, Upton, New York 11973, USA
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- Kohn Key
- Department of Physics, Waseda University, Okubo–3, Tokyo 169
書誌事項
- タイトル別名
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- Two Spin-State Transitions in LaCoO3.
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Neutron-diffraction measurements have revealeda new anomalous thermal lattice expansion of LaCoO3 near 500 K thatindicates the existence of a second spin-state transition, in addition to theone previously established near 100 K. The anomalous expansion and thetemperature dependence of the Co magnetic moments are successfullyinterpreted in a wide temperature range based on a simple model assuminglow-spin (LS, S=0), intermediate-spin (IS, S=1), and high-spin(HS, S=2) states of Co atoms.The first spin transition, near 100 K, is from LS to IS, andthe second, near 500 K, is from IS to a mixed state of IS and HS.The fitted model parameters indicate that the initially-large energy differencebetween IS and HS states decreases towards zero as the secondtransition proceeds. The large drop in resistivity associated with the lattertransition appears to be correlated with the population of the HS state.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 67 (1), 290-296, 1998
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390001204181898880
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- NII論文ID
- 210000101073
- 110001978260
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- NII書誌ID
- AA00704814
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- BIBCODE
- 1998JPSJ...67..290A
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 4395715
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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