Structural study of the ferroelectric instability in Sn\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document}P\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document}Se\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document}

被引:0
|
作者
R. Enjalbert
J. Galy
Y. Vysochanskii
A. Ouédraogo
P. Saint-Grégoire
机构
[1] CEMES-CNRS (UP - CNRS 8011),
[2] B.P. 4347,undefined
[3] 31055 Toulouse Cedex,undefined
[4] France,undefined
[5] Department of Physics and Chemistry of Solid State,undefined
[6] Uzhgorod State University,undefined
[7] 294000 Uzhgorod Ukraine,undefined
[8] Université de Ouagadougou,undefined
[9] FAST,undefined
[10] Ouagadougou,undefined
[11] Burkina,undefined
[12] Université Toulon-Var,undefined
[13] Bâtiment R,undefined
[14] B.P. 132,undefined
[15] 83957 La Garde Cedex,undefined
[16] France,undefined
关键词
PACS. 61.10.Nz Crystal structure solution and refinement techniques using X-rays - 64.70.Rh Solid-solid transitions - 77.80.-e Ferroelectricity and antiferroelectricity;
D O I
10.1007/s100510050680
中图分类号
学科分类号
摘要
The structural change occurring in \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document} between the paraelectric and the ferroelectric phases is investigated by means of X-ray diffraction. Details of the structure in both phases are obtained and the role of the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document} lone pair is discussed in the light of structural data. In agreement with the 2/m to m symmetry lowering, polar displacements are found within the m plane away from a particular crystallographic direction but antiparallel displacements occur also. These results are discussed in the frame of the phenomenological theory which predicts a particular temperature dependence of the dielectric polarization in this crystal.
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页码:169 / 177
页数:8
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