IONIC DISORDER IN THE PHASE-TRANSITION OF PBTIO3

被引：12

作者：

FONTANA, MD ^{[1
]}

WOJCIK, K ^{[1
]}

IDRISSI, H ^{[1
]}

KUGEL, GE ^{[1
]}

机构：

[1] SILESIAN UNIV,INST PHYS,PL-40007 KATOWICE,POLAND

来源：

FERROELECTRICS | 1990年 / 107卷

关键词：

D O I：

10.1080/00150199008221519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Low-frequency light scattering and dielectric measurements on the same single-domain PbTiO3 crystal are reported as a function of temperature. Spectra reveal the appearance of a quasi-elastic scattering in the vicinity of the cubic-tetragonal phase transition. The relaxing dipoles associated with this central peak are shown to explain for the main part the large values and the behaviour of the dielectric permittivity around the transition temperature. These results represent the first evidence of order/disorder process in the mechanism of the PbTiO3 phase transition which is generally considered as a textbook example of a displacive transition. © 1990, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：91 / 96

页数：6