THE NATURE OF FERROELECTRIC PHASE-TRANSITION DIFFUSION IN DISORDERED CRYSTALS

被引：9

作者：

BOKOV, AA

机构：

[1] Institute of Physics, Rostov State University, Rostov-on-Don

来源：

SOLID STATE COMMUNICATIONS | 1994年 / 90卷 / 10期

关键词：

Crystal structure - Crystallography - Crystals - Diffusion - Ions - Models - Order disorder transitions - Oscillators (electronic) - Oxides - Perovskite;

D O I：

10.1016/0038-1098(94)90547-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A model is developed which proposes a new origin for the diffusion of phase transitions in disordered ferroelectrics. It was noticed that the crystallographc positions which are equivalent in the ordered structure become nonequivalent in the disordered state. A model of coupled anharmonic oscillators is used to describe this effect. Assuming that the model parameters depend on the distance between ions, explicit expressions for the diffusion parameter are obtained.

引用

页码：687 / 691

页数：5

共 17 条

[1] DIFFUSE PHASE-TRANSITION IN PB(FE0.5NB0.5)O3-BASED SOLID-SOLUTIONS [J].