English

应用科学学报 ›› 1988, Vol. 6 ›› Issue (2): 169-174.

• 论文 • 上一篇    下一篇

层状晶体H2C4O4的反铁电相变理论

张晶波1, 孙和璧2, 秦自楷1   

  1. 1. 山东大学;
    2. 上海交通大学
  • 收稿日期:1985-07-08 修回日期:1985-12-30 出版日期:1988-06-30 发布日期:1988-06-30

THEORY OF PHASE TRANSITION IN THE LAYERED ANTIFERRO-ELECTRIC H2C4O4

ZHANG JINGBO1, SUN HEBI2, QIN ZIKAI1   

  1. 1. Shandong University;
    2. Shanghai Jiao Tong University
  • Received:1985-07-08 Revised:1985-12-30 Online:1988-06-30 Published:1988-06-30

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摘要： 本文在赝自旋模型的基础上,根据H3C4O4晶体的层状结构特点,用Green函数方法研究了它的相变性质.结果表明H2C4O4的顺电-反铁电相变是一级相变.而Zinenko基于同样模型只得出二级相交的结论.求出了序参数随温度变化的关系,其结果与实验基本相符.

Abstract: The para-and antiferro-electric phase transition of an H2C4O4 crystal is studied by means of Green's function theory based upon a pseudospin model and by taking into account its layered structure. We derive a first order transition instead of a second order one as concluded by Zinenko with the same model. We also find the change of the order parameter with temperature in better conformity with measurements.