Displacive vs. order-disorder in structural phase transitions

被引：11

作者：

Pérez-Mato, JM ^{[1
]}

Ivantchev, S ^{[1
]}

García, A ^{[1
]}

Etxebarria, I ^{[1
]}

机构：

[1] Univ Basque Country, Dept Fis Mat Condensada & Fis Aplicada 2, E-48080 Bilbao, Spain

来源：

FERROELECTRICS | 2000年 / 236卷 / 1-4期

关键词：

displacive; order-disorder; structural phase stransitions;

D O I：

10.1080/00150190008016044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quantitative assessment of the displacive degree of a structural phase transition is discussed both from a microscopical and an empirical viewpoint. Using Monte Carlo results for the Phi(4) model as a qualitative guide, the relation between both perspectives is shown. Based on the general trends observed, an empirical parameter for describing the displacive degree of any structural phase transition is proposed. The Rhodes-Wolfarth factor extended to ferroelectrics by Tokunaga [J. Phys. Sec. Jpn (1988) 4275] is a realization of this general parameter for the particular case of proper ferroelectrics. The power and limitations of such approach are discussed.

引用

页码：93 / 103

页数：11

共 50 条

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