Nonlinear dielectric response of relaxor ferroelectrics

被引：54

作者：

Pirc, R ^{[1
]}

Blinc, R ^{[1
]}

Kutnjak, Z ^{[1
]}

机构：

[1] Jozef Stefan Inst, Ljubljana 1001, Slovenia

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.65.214101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The behavior of the third-order nonlinear dynamic dielectric susceptibility chi(3)(omega) in relaxor ferroelectrics is investigated in the framework of the spherical random-bond-random-field model. It is shown that there are two distinct contributions to chi(3)(omega): The first one chi(3)(omega)(I), which has been studied earlier, is due to the intrinsic nonlinearity of the rigid spherical model; the second contribution chi(3)(omega)(II) arises from the field modulation of the average coupling between polar clusters. The frequency and temperature dependence of chi(3)(omega)(II) is calculated and compared with chi(3)(omega)(I). In the static limit, the results for chi(3)(omega)(II) are in qualitative agreement with the measured field-cooled static nonlinear dielectric permittivity in Pb1-xLax(ZryTi1-y)(1-x/4)O-3 ceramics.

引用

页码：1 / 7

页数：7

共 18 条

[1] Local polarization distribution and Edwards-Anderson order parameter of relaxor ferroelectrics [J].