Spin State of Co
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概要
- 論文の詳細を見る
Neutron diffraction for a polycrystalline sample of LaCo<inf>0.8</inf>Rh<inf>0.2</inf>O<inf>3</inf>and synchrotron x-ray diffraction for polycrystalline samples of LaCo<inf>0.9</inf>Rh<inf>0.1</inf>O<inf>3</inf>and LaCo<inf>0.8</inf>Rh<inf>0.2</inf>O<inf>3</inf>have been carried out in order to investigate the structural properties related with the spin state of Co<sup>3+</sup>ions. We have found that the Co(Rh)--O bond lengths in the Co(Rh)O<inf>6</inf>octahedron of LaCo<inf>0.8</inf>Rh<inf>0.2</inf>O<inf>3</inf>are nearly identical at 10 K. The lattice volume for the Rh<sup>3+</sup>substituted samples decreases with the thermal expansion coefficient similar to that of LaCoO<inf>3</inf>from room temperature, and ceases to decrease around 70 K. These experimental results favor a mixed state consisting of the high-spin-state and low-spin-state Co<sup>3+</sup>ions, and suggest that there are thermally excited high-spin-state Co<sup>3+</sup>ions in addition to those pinned by the substituted Rh<sup>3+</sup>ions.
- The Physical Society of Japanの論文
- 2013-11-15
著者
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Igawa Naoki
Japan Atomic Energy Agency
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Yamauchi Hisao
Laboratory Of Inorganic Chemistry Department Of Chemistry Helsinki University Of Technology
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Terasaki Ichiro
Department Of Applied Physics The University Of Tokyo
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Karppinen Maarit
Laboratory Of Inorganic Chemistry Department Of Chemistry Helsinki University Of Technology
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Okazaki Ryuji
Department Of Earth And Planetary Sciences Faculty Of Sciences Kyushu University
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Ishigaki Toru
Frontier Research Center For Applied Atomic Sciences Ibaraki University
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Hoshikawa Akinori
Frontier Research Center For Applied Atomic Sciences Ibaraki University
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Asai Shinichiro
Department Of Internal Medicine Saiseikai Central Hospital
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Yasui Yukio
Department Of Physics Division Of Material Science Nagoya University
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Kobayashi Wataru
Graduate School Of Pure And Applied Sciences University Of Tsukuba
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Nakao Hironori
Condensed Matter Research Center and Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
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Terasaki Ichiro
Department of Physics, Nagoya University, Nagoya 464-8602, Japan
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Murakami Youichi
Condensed Matter Research Center and Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
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Nakao Akiko
Research Center for Neutron Science and Technology, Tokai, Ibaraki 319-1106, Japan
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Kobayashi Kensuke
Condensed Matter Research Center and Photon Factory, IMSS, KEK, Tsukuba, Ibaraki 305-0801, Japan
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Kumai Reiji
Condensed Matter Research Center and Photon Factory, IMSS, KEK, Tsukuba, Ibaraki 305-0801, Japan
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Parkkima Outi
Laboratory of Inorganic Chemistry, Department of Chemistry, Aalto University, Espoo FI-00076, Finland
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Nakao Hironori
Condensed Matter Research Center and Photon Factory, IMSS, KEK, Tsukuba, Ibaraki 305-0801, Japan
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Murakami Youichi
Condensed Matter Research Center and Photon Factory, IMSS, KEK, Tsukuba, Ibaraki 305-0801, Japan
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Karppinen Maarit
Laboratory of Inorganic Chemistry, Department of Chemistry, Aalto University, Espoo FI-00076, Finland
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Igawa Naoki
Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
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Yasui Yukio
Department of Physics, Meiji University, Kawasaki 214-8571, Japan
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Hoshikawa Akinori
Frontier Research Center for Applied Atomic Sciences, Ibaraki University, Tokai, Ibaraki 319-1106, Japan
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