Freezing of dipole dynamics in relaxor ferroelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 as evidenced by dielectric spectroscopy

被引：47

作者：

Bokov, AA ^{[1
]}

Ye, ZG ^{[1
]}

机构：

[1] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 34期

关键词：

D O I：

10.1088/0953-8984/12/34/101

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Complex dielectric susceptibility (chi'+j chi ") has been studied at f = 10(-2)-10(-5) Hz in the relaxer ferroelectric 0.75Pb(Mg1/3Nb2/3)O-3-0.25PbTiO(3). In addition to the well known relaxer dispersion observed at temperatures around and below the temperature of permittivity maximum T-m, a new and comparatively weak dispersion has been disclosed at T > T-m. It is described by the 'universal relaxation law', chi " = cot(n pi/2)chi' alpha f(n-1). The temperature dependence of the exponent n follows the Vogel-Fulcher relation, indicating a process of freezing into the nonergodic state.

引用

页码：L541 / L548

页数：8

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