DIFFUSE PHASE-TRANSITIONS AND RANDOM-FIELD-INDUCED DOMAIN STATES OF THE RELAXOR FERROELECTRIC PBMG1/3NB2/3O3

被引：978

作者：

WESTPHAL, V ^{[1
]}

KLEEMANN, W ^{[1
]}

GLINCHUK, MD ^{[1
]}

机构：

[1] ACAD SCI UKSSR,INST SOLID STATE PHYS,KIEV 252180,UKRAINE,USSR

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.68.847

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The diffuseness of the ferroelectric phase transition in PbMg1/3Nb2/3O3 is proposed to be due to quenched random electric fields originating from charged compositional fluctuations. They are responsible for the extreme critical slowing down, the freezing into nanometric ferroelectric domains, and the slow relaxation of the polarization below T(c) is-similar-to 212 K. Barkhausen jumps during poling exclude glassiness, which was conjectured previously. At T(c) a ferroelectric anomaly of the dielectric permittivity appears, if the random fields are overcome by an external electric field.

引用

页码：847 / 850

页数：4

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