Thermal and Dielectric Properties of a New Ferroelectric LaBGeO_5
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概要
- 論文の詳細を見る
Thermal and dielectric properties of LaBGeO_5, a new ferroelectric with a stillwellite-type structure are investigated. The specific heat, C_p, shows one clear anomaly (ΔS=0.114 R) at 802.5 K. The basic thermodynamic parameters are determined on the basis of the Landau theory. However, an additional hump in C_p was found in a different sample just above T_c. This dependence on samples is confirmed by the measurements of dielectric constants. The appearance of the new intermediate phase may be caused by some impurities or defects. The Rhodes-Wohlfarth plot suggests that the nature of the phase transitions is of the displacive-type.
- 社団法人日本物理学会の論文
- 1993-12-15
著者
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Haga Hisashi
Department Of Physics Faculty Of Science Hokkaido University
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UESU Yoshiaki
Department of Physics, Waseda University
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Uesu Yoshiaki
Depart. Phys. Waseda Univ.
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Onodera Akira
Department of Physics, Faculty of Science, Hokkaido University
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Yamashita Haruyasu
Department of Electronics and Information Engineering, Faculty of Engineering, Hokkai-Gakuen Univers
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Strukov A.
Department Of Physics Moscow State University
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Belov A.
Department of Physics, Moscow State University
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Taraskin A.
Department of Physics, Moscow State University
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Belov A.
Department Of Physics Moscow State University
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Taraskin A.
Department Of Physics Moscow State University
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Onodera Akira
Department Of Molecular Life Science Tokai University School Of Medicine
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Haga Hisashi
Division Of Biological Sciences Graduate School Of Science Hokkaido University
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Yamashita H
Department Of Electronics And Information Engineering Faculty Of Engineering
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Yamashita Haruyasu
Department Of Electronics And Information Engineering Faculty Of Engineering Hokkai-gakuen Universit
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Haga Hisashi
Department of Biological Sciences, Graduate School of Science, Hokkaido University, North 10 West 8, Kita-ku, Sapporo 060-0810, Japan
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