High frequency dielectric relaxation in Pb(Sc1/2Ta1/2)O-3 ceramics

被引：21

作者：

Chu, F ^{[1
]}

Setter, N ^{[1
]}

Elissalde, C ^{[1
]}

Ravez, J ^{[1
]}

机构：

[1] CNRS,INST CHIM MATIERE CONDENSEE BORDEAUX,F-33608 PESSAC,FRANCE

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1996年 / 38卷 / 1-2期

关键词：

dielectric relaxation; ferroelectrics; electrical measurements; ceramics;

D O I：

10.1016/0921-5107(95)01377-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pb(Sc1/2Ta1/2)O-3 ceramics have been characterized by dielectric measurements in a wide range of frequencies (10(2)-10(9) Hz). A strong dispersion occurs with two low and high frequency contributions below the transition temperature. Only high frequency relaxation is still observed at high temperature. A microscopic model of correlated chains was used in order to explain the latter relaxation. Dipole correlations at low temperature are responsible for the low frequency dispersion. A minimum in the high frequency relaxation appears at the transition temperature. Identical results have been observed for a Pb(Sc1/2Nb1/2)O-3 ceramic.

引用

页码：171 / 176

页数：6

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