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

被引:25
|
作者
Iwata, M [1 ]
Orihara, H
Ishibashi, Y
机构
[1] Nagoya Univ, Dept Appl Phys, Grad Sch Engn, Nagoya, Aichi 4648603, Japan
[2] Aichi Shukutoku Univ, Fac Commun, Nagakute, Aichi 4801197, Japan
关键词
morphotropic phase boundary; piezoelectric; field induced transition; engineered domain configuration; free energy; Landau theory;
D O I
10.1080/714939482
中图分类号
T [工业技术];
学科分类号
08 ;
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.
引用
收藏
页码:57 / 71
页数:15
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