Structure Study of Paraelectric-Ferroelectric Phase Transition in Monoclinic K_2ZnBr_4

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概要

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• The phase transitic>n from the paraelectric phase (cx phase) to the ferroelectric oneof monoclinic K,ZnBr. at about 159 K is investigated by means of X-ray diffraction.The space groups of the para- and ferroelectric phases are confirmed to be P2. / m andP2., respectively. The crystal structures of both phases are also determined at 296 and123 K, respectively. In the paraelectric phase, the displacive and the disorderedmodels are examined: The significance test shows that ZnBr. tetrahedron is indisorder. In the ferroelectric phase, ZnBr. tetraheclron is ordered and two indepen-dent potassiurn ions are translated in a same direction along the #-axis.[X-ray diffraction, K2 ZnBr., phase transition, ferroelectrics, Sr,GeS.-type struc- lI lurel

• 社団法人日本物理学会の論文
• 1992-05-15

著者

• KASANO Hironobu

  Department of Physics,School of Science

• Takesada Masaki

  Department of Physics, School of Science, Hokkaido University

• MASHIYAMA Hiroyuki

  Department of Physics,Faculty of Science,Yamaguchi University

• Mashiyama Hiroyuki

  Department Of Physics Biology And Informatics Faculty Of Science Yamaguchi University

• Takesada Masaki

  Department Of Physics Faculty Of Science Yamaguchi University

• Kasano Hironobu

  Department Of Physics Faculty Of Science Yamaguchi University

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