Domain reorientation in ferroelectric-ferroelastic ceramics

被引：4
|
作者：
Eiras, J. A. [1 ]
Lente, M. H. [2 ]
机构：
[1] Univ Fed Sao Carlos, Dept Fis Grp Ceram Ferroeletr, BR-13565905 Sao Carlos, SP, Brazil
[2] Univ San Francisco, Programa Posgrad Engn Ciencia Mat, BR-13251900 Itatiba, SP, Brazil
来源：
FERROELECTRICS | 2008年 / 363卷
关键词：
polarization switching; ferroelectrics; PMN-PT; PZT; symmetry;
D O I：
10.1080/00150190802019312
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The polarization switching process was investigated in ferroelastic-ferroelectric ceramics through hysteresis loops and the electric field induced-strain measurements. PMN-PT ceramics with rhombohedral and tetragonal symmetries as well as soft and hard PZT ceramics were investigated. The ferroelectric polarization switching in ceramics was emphasized as an elastic problem related to ferroelastic non-180 degrees domains. The domain reorientation was showed as occurring in a viscous medium, where the "active" domains lie in a conical distribution and the restoring forces tire resulting from electrical and mechanical contributions. The coercive field was interpreted as the effective field necessary to overcome these resistance forces during the reorientation process.
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页码：79 / 85
页数：7
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