High-Temperature Metallic State of Room-Temperature Ferromagnet Sr_<1-x>Y_x CoO_<3-δ>(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Resistivity, thermopower, Hall coefficient, and magnetization are measured for a set of polycrystalline samples of the room-temperature ferromagnet Sr_<1-x>Y_xCoO_<3-δ> up to 800K. A peculiar metallic state accompanied by a large effective magnetic moment of 3.40 μ_B/Co is observed above 600K, indicating that electrons on the Co^<3+> ions are magnetic and itinerant. The magnetic Co^<3+> ions survive at low temperatures, which causes the ferromagnetism below 335K. We attribute this to the large CoO_6 octahedra stabilized in the A-site ordered structure.
- 社団法人日本物理学会の論文
- 2006-10-15
著者
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Kobayashi Wataru
Department of Biology,Faculty of Science, Hokkaido University
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Yoshida Shin
Department Of Digestive Surgery And Surgical Oncology (surgery Ii) Yamaguchi University Graduate Sch
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TERASAKI Ichiro
Department of Applied Physics, Waseda University
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Terasaki Ichiro
Department Of Applied Physics Waseda University
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Terasaki Ichiro
Department Of Applied Physics The University Of Tokyo
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Kobayashi Wataru
Department Of Applied Physics Waseda University
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Yoshida Shin
Department Of Applied Physics Waseda University
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Kobayashi Wataru
Waseda Univ. Tokyo
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