Temperature stability of the piezoelectric and elastic response of dc biased [001] and [110] oriented Pb(Zn1/3Nb2/3)O3-PbTiO3 single crystals

被引:14
作者
Amin, A [1 ]
Viehland, D
机构
[1] Naval Sea Syst Command, Newport, RI 02841 USA
[2] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA
关键词
D O I
10.1063/1.1789271
中图分类号
O59 [应用物理学];
学科分类号
摘要
Temperature and field dependent investigations of the longitudinal electromechanical properties of [001]- and [110]-oriented 0.955Pb(Zn1/3Nb2/3)O-3-0.045PbTiO(3) single crystals have been performed. Electromechanical equivalence was found between [001] and [110] orientations in the ferroelectric rhombohedral FEr phase region, but not in the ferroelectric tetragonal FEt one. A dc bias of 0.4 MV/m did not affect this equivalence. Softening of the dielectric constant (K), piezoelectric coefficient (d(33)), and Young's modulus (Y) were observed along both the [001] and [110] orientations in the FEr phase region on heating towards the FEt one. Above the FEr-FEt phase transition, a significant anisotropy was observed in the electromechanical and elastic coefficients. These results demonstrate that the enhanced length extensional (33-mode) electromechanical coupling k(33) of rhombohedral crystals far from the morphotropic phase boundary is not constrained to the <001> orientation, but rather to the (110) plane. (C) 2004 American Institute of Physics.
引用
收藏
页码:5140 / 5143
页数:4
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