Transport Properties of the High Temperature Phase of Fe_3O_4
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概要
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Electrical conductivity and Hall effect were measured for the high temperature phase of Fe_3O_4 single crystals with different stoichiometry, in an external magnetic field up to 27 kOe. It was confirmed that the transport properties do not depend so much on stoichiometry, in contrast to the low temperature phase. Temperature dependence of the conductivity and magnetoresistance as well as extraordinary Hall coefficient which changes sign at 650 K indicate that not only 3d electrons of Fe ions in the B site but also of those in the A site and/or 2p electrons of O ions contribute to the transport above 400 K. Below 250 K, extraordinary Hall coefficient is proportional to p^<0.5>. The results of the present experiments are discussed in connection with previous reports. Formation of large polarons below 250 K is suggested.
- 社団法人日本物理学会の論文
- 1995-06-15
著者
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Shin-ichi Kimura
Uvsor Facility Institute For Molecular Science
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Kimura S
The Graduate School Of Science An Technology Kobe University
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Siratori K
Kyushu Univ. Fukuoka
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Siratori Kiiti
Institute Of Materials Structure Science High Energy Accelerator Research Organization
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Siratori Kiiti
Department Of Physics Osaka University
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Shiratori K
Kyushu Univ. Fukuoka
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Siratori Kiiti
Department Of Physics Faculty Of Science Osaka University
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Kimura S
Graduate School Of Science And Technology Kobe University
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Kimura Shin-ichi
Division Of Mathematical And Material Science Graduate School Of Science And Technology
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TODO Sakae
Institute for Solid State Physics,University of Tokyo
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Siratori Kiiti
Depatment Of Physics Faculty Of Science Kyusyu University
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Kimura Shojiro
Molecular Photoscience Research Center And Department Of Physics:(present Address)kyokugen Osaka Uni
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Kimura Shigeyuki
National Institute for Research in Inorganic Materials
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Todo Sakae
Institute For Solid State Physics The University Of Tokyo
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Todo Sakae
Dept. Of Applied Physics Nagoya University
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