Dielectric Properties of Ferroelectric Hexagonal BaTiO_3
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概要
- 論文の詳細を見る
Dielectric properties of he,xagonal Basic. have been studied under a variety of con-ditions. Anomalies are found in the dielectric constant e: along the hexagonal c-axis:a cusp-like anomaly at T.=222 K and a peak at the ferroelectric Curie point ofT.=74 K. After a dc field cooling treatment applied along the c-axis below T., the e:increases appreciably at T., and even in the non-ferroelectric intermediate phase(7'.< T< T.) some increase of e( is found. The Curie-Weiss law c( =e.((cO)-I-C/(T -7'.) holds above T. with C=l.9X10'K, T.=7OK and cj(()=280. Theestimated spontaneous polarization at 50 K is about 2 X 10 ' C / m'. The dielectricanomaly at T. disappears if the sample is mechanically clamped. A complex twin configuration appears below T(, and a rearrangement of twins occur if an intense dc biasis applied. A ferroelastic nature of the 74 K ferroelectric transition and effects of biasfield on the twin configuration are discussed.
- 社団法人日本物理学会の論文
- 1989-03-15
著者
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Oomi Gendo
Department of Physics, Kyushu University
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AKISHIGE Yukikuni
Department of Physics,Faculty of Science,Hokkaido University
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SAWAGUCHI Etsuro
Department of Physics,Faculty of Science,Hokkaido University
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Akishige Yukikuni
Department Of Physics Faculty Of Science Hokkaido University
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Sawaguchi Etsuro
Department Of Physics Faculty Of Science Hokkaido University
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Oomi Gendo
Department Of Mechanical Engineering And Materials Science Faculty Of Engineering Kumamoto Universit
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Akishige Yukikuni
Department Of Physics Faculty Of Education Shimane University
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Yamaoto Taizo
Department of Physics,Faculty of Science,Hokkaido University
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Yamaoto Taizo
Department Of Physics Faculty Of Science Hokkaido University
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Oomi Gendo
Department of Physics,Faculty of General Education,Kumamoto university
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