Effect of a bias field on the dielectric properties of 0.69Pb(Mg1/3Nb2/3)O3-0.31PbTiO3 single crystals with different orientations

被引：28

作者：

Zhao, XY ^{[1
]}

Wang, J

Chan, HLW

Choy, CL

Luo, HS

机构：

[1] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 201800, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2003年 / 15卷 / 40期

关键词：

D O I：

10.1088/0953-8984/15/40/025

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The microdomain-macrodomain transformations and phase transitions in 0.69Pb(Mg1/3Nb2/3)O-3-0.31PbTiO(3) single crystals were investigated by measuring the temperature dependence of relative permittivity as a function of crystal orientation and applied dc bias. A rhombohedral-tetragonal phase transition in the original crystal has been confirmed by powder x-ray diffraction at temperatures from 25 to 180 degreesC. The results show that microdomain relaxor ferroelectric states in the original crystals could be transformed to macrodomain ferroelectric states by applying a dc bias along any of the <111>, <011> and <001> directions. It is also proposed that an electric field applied along the <011> or <001> direction could induce an orthorhombic or a monoclinic ferroelectric phase, respectively, between the rhombohedral and tetragonal ferroelectric phases in an intermediate temperature range.

引用

页码：6899 / 6908

页数：10

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