中国物理B ›› 2005, Vol. 14 ›› Issue (6): 1246-1249.doi: 10.1088/1009-1963/14/6/033

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Dependence of interface motion on pressure in ferroelectrics

艾树涛   

  1. Department of Physics, Linyi Normal University, Linyi, Shandong,276005, China
  • 收稿日期:2004-11-15 修回日期:2005-02-04 出版日期:2005-05-27 发布日期:2005-05-27
  • 基金资助:
    Project supported by the Research Foundation Program of Linyi Normal University with grant No. YJB03004.

Dependence of interface motion on pressure in ferroelectrics

Ai Shu-Tao (艾树涛)   

  1. Department of Physics, Linyi Normal University, Linyi, Shandong,276005, China
  • Received:2004-11-15 Revised:2005-02-04 Online:2005-05-27 Published:2005-05-27
  • Supported by:
    Project supported by the Research Foundation Program of Linyi Normal University with grant No. YJB03004.

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摘要： The motion of the paraelectric-ferroelectric interface in KNbO3 under hydrostatic pressure is studied in the framework of the mean-field theory. The kink solution is applied to the calculations of the width and velocity of the interface at different pressures. The calculations are based on the experimental data for the Curie-Weiss constant and the parameter of the Ginzburg-Landau expression for the free energy. The response to hydrostatic pressure and tricritical point is investigated nonempirically.

Abstract: The motion of the paraelectric-ferroelectric interface in KNbO3 under hydrostatic pressure is studied in the framework of the mean-field theory. The kink solution is applied to the calculations of the width and velocity of the interface at different pressures. The calculations are based on the experimental data for the Curie-Weiss constant and the parameter of the Ginzburg-Landau expression for the free energy. The response to hydrostatic pressure and tricritical point is investigated nonempirically.

Key words: Interface, Pressure, Ferroelectrics, Ginzburg-Landau Equation

中图分类号: 

  • 77.80.Bh
65.40.G- (Other thermodynamical quantities)