Charge Disproportionation and Magnetic Order of CaFeO_3 under High Pressure up to 65 Gpa : Condensed Matter: Electronic Properties, etc.
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概要
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Using a diamond anvil cell, ^<57>Fe Mossbauer spectroscopy has been carried out on the perovskite oxide CaFeO_3 under high pressures up to 65 GPa at various temperatures. The critical temperature of a charge disproportionation (CD: 2Fe^<4+> ⇾ Fe^<3+> + Fe^<+5>) and a magnetic ordering have been determined as a function of pressure. The CD occurs at an almost constant temperature of about 290 ± 3 K in the pressure range of 0-17GPa. At an increase of the pressure above 20 GPa, the CD reaction is suppressed and its critical temperature reduces to lower than 6 K. On the other hand, the magnetic ordering temperature of 125 K at an ambient pressure rises to 400 K at 34 GPa without the CD, which suggests that the different charged particles control the charge and spin order separately in CaFeO_3.
- 社団法人日本物理学会の論文
- 2001-06-15
著者
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森本 正太郎
大阪大谷大
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TAKANO Mikio
Institute for Chemical Research, Kyoto University
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ENDO Shoichi
Research Center for Materials Science at Extreme Conditions, Osaka University
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Kitao Shinji
Research Reactor Institute Kyoto University
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Endo S
Research Center For Materials Science At Extreme Conditions Osaka University
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Endo Shoichi
High Pressure Reseach Laboratory Faculty Of Engineering Science Osaka University
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NASU Saburo
Division of Materials Physics, Department of Physical Science, Graduate School of Engineering Scienc
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Takasaki S
Himeji Inst. Technol. Kamigohri
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Sasaki Takahiko
Department Of Material Science Himeji Institute Of Technology
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Takano M
Institute For Chemical Research Kyoto University
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Takano M
Kyoto Univ. Kyoto
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Takano Mikio
Department Of Chemistry Faculty Of Science Konan University
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Takano Mikio
Institute For Chemical Research (icr) Kyoto University
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Kawado Seiji
Environment & Analysis Technology Department Technical Support Center Sony Corporation
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Kikuta Seishi
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo
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Kikuta Seishi
Institute For Solid State Physics University Of Tokyo
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Kawasaki S
Lnstitute For Chemical Research Kyoto University
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KAWAKAMI Takateru
Division of Materials Physics, Department of Physical Science, Graduate School of Engineering Scienc
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SASAKI Tetsuya
Division of Materials Physics, Department of Physical Science, Graduate School of Engineering Scienc
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MORIMOTO Syotaro
Division of Materials Physics, Department of Physical Science, Graduate School of Engineering Scienc
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KAWASAKI Syuji
Institute for Chemical Research, Kyoto University
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Sasaki T
Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science
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Sasaki T
Institute For Materials Research Tohoku University
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Kawakami T
Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science
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Sasaoka T
Hitachi Cable Ltd. Ibaraki
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Sasaki Takanori
Department Of Applied Physics Tohoku University
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Sasaki Takatomo
Institute Of Laser Engineering Department Of Electrical Engineering Osaka University
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Takasaki Satoshi
Department Of Material Science Faculty Of Science Himeji Institute Of Technology
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Kawakami Takateru
Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science
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Sasaki Tetsuya
Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science
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Mitsui Takaya
Crest Japan Science And Technology Agency:japan Atomic Energy Agency
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Endo Shoichi
Research Center For Extrem Materials Osaka University
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Kaito Shinji
Research Reactor Institute Kyoto University
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Kikuta S
Univ. Tokyo Tokyo
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Sasaki Tetsuya
Division Of Biological Sciences Graduate School Of Sciences Hokkaido University
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Nasu Saburo
Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science
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Kikuta Seishi
Research Reactor Institute, Kyoto University
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Kawakami Takateru
Division of Materials Physics, Department of Physical Science, Graduate School of Engineering Science, Osaka University
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Sasaki Tetsuya
Institute for Materials Research, Tohoku University
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