Anisotropy of piezoelectricity near morphotropic phase boundary in perovskite-type oxide ferroelectrics

被引：0

作者：

Iwata, Makoto ^{[1
]}

Orihara, Hiroshi ^{[1
]}

Ishibashi, Yoshihiro ^{[2
]}

机构：

[1] Applied Physics Department, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan

[2] Faculty of Communications, Aichi Shukutoku University, Nagakute-cho, Aichi 480-1197, Japan

来源：

Ferroelectrics | 2002年 / 266卷

关键词：

Anisotropy - Electrostriction - Free energy - Perovskite - Phase transitions - Piezoelectricity;

D O I：

10.1080/00150190211309

中图分类号：

学科分类号：

摘要：

Angle dependence of the piezoelectric displacement along the driving electric field was calculated near the morphotropic phase boundary in the perovskite-type oxide family on the basis of the Landau-Devonshire type free energy function. It was found that the piezoelectric displacement in the tetragonal phase near the morphotropic phase boundary takes a maximum when the field is applied along the [111] direction, while the piezoelectric displacement in the rhombohedral phase takes a maximum in the direction, which depends on the values of the elastic and electrostrictive constants. In both phases the piezoelectric displacements are strongly enhanced near the morphotropic phase boundary. © 2002 Taylor & Francis.

引用

页码：393 / 407

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