Dielectric Studies of Ferroelectric Phase Transitions in Pb_<2x>Sn_<2(1-x)>P_2S_6 Single Crystals

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概要

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• The dielectric constant of Pb_<2x>Sn_<2(1-x)>P_2S_6 single crystals was measured at several frequencies from 0.1 to 100 kHz between 3.7 and 420 K. No phase transition is observed at x=1.0. The ferroelectric-paraelectric phase transition temperature decreases linearly as x increases, but curves slightly around x=0.3 and bends at x=0.61. The lowering of the phase transition with an increase in x is considered to be a result of the motion of the Sn^<2+> ion. At x=0.61 and 0.66, the relatively large dispersions were interpreted as diffuse phase transitions caused by the fluctuation of the concentration of Pb^<2+> ions.

• 1995-05-15

著者

• Yano Shinichi

  Department Of Synthetic Chemistry Gifu University

• Yano Shinichi

  Department Of Chemistry Faculty Of Engineering Gifu University

• Ushida M

  Department Of Chemistry Faculty Of Engineering Gifu University

• MORIYA Keiichi

  Department of Chemistry, Faculty of Engineering, Gifu University

• Nakagawa Atsushi

  Department Of Endocrinology Kanazawa Medical University

• WATANABE KAZUNORI

  Department of Surgery, Asahikawa Medical College

• Moriya K

  Gifu Univ. Gifu

• Moriya Keiichi

  Department Of Chemistry Faculty Of Engineering Gifu University

• IWAUCHI Kozo

  Institute for Chemical Research, Kyoto University

• Akagi Y

  Technical Institute Sharp Co. Ltd.

• Iwauchi K

  Institute For Chemical Research Kyoto University

• Iwauchi Kozo

  Institute For Chemical Research Kyoto University

• Ushida Masayuki

  Department of Chemistry, Faculty of Engineering, Gifu University

• Motojima Seiji

  Department of Chemistry, Faculty of Engineering, Gifu University

• Akagi Yoshiro

  Technical Institute, Sharp Co. Ltd.

• Motojima S

  Gifu Univ. Gifu Jpn

• Motojima Seiji

  Department Of Applied Chemistry Faculty Of Engineering Gifu University

• Ushida Masanori

  Department of Materials Science and Engineering,Nagoya Institute of Technology

• Nakagawa A

  Ntt Cyber Space Lab. Musashino Jpn

• Nakagawa Atsushi

  Department Of Applied Physics Faculty Of Science Tokyo Institute Of Technology

• Watanabe Kazunori

  Department Of Chemistry Faculty Of Engineering Gifu University

• Watanabe Kazunori

  Department Of Applied Chemistry Faculty Of Engineering Hiroshima University

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