Roles of the higher order anisotropic terms in successive structural phase transitions: The method of determination of phenomenological parameters

被引：36

作者：

Fujita, K ^{[1
]}

Ishibashi, Y ^{[1
]}

机构：

[1] NAGOYA UNIV,SCH ENGN,DEPT APPL PHYS,NAGOYA,AICHI 46401,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1997年 / 36卷 / 1A期

关键词：

successive phase transitions; Landau-type free energy; phase diagrams; phase sequences;

D O I：

10.1143/JJAP.36.254

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A simple and general method for choosing appropriate coefficients of the higher order invariants in the free energy function to reproduce successive phase transitions is presented. It is found, when applied to perovskite structure-based systems, that the phase sequences such as cubic-rhombohedral-orthorhombic-tetragonal, cubic-tetragonal-rhombohedral; cubic-rhombohedral-orthorhombic and cubic-rhombohedral-tetragonal are reproducible in the phase diagram as a result of appropriate choice of model parameters as shown using the present method.

引用

页码：254 / 259

页数：6