Electromechanical coupling coefficient of 0.70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 single crystal resonator with arbitrary aspect ratio

被引：11
作者：
Huang, Naixing
Zhang, Rui [1 ]
Cao, Wenwu
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 150080, Peoples R China
[2] Daqing Petr Inst, Dept Phys, Daqing 163318, Heilongjiang, Peoples R China
[3] Penn State Univ, China & Mat Res Inst, University Pk, PA 16802 USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 12期
基金：
美国国家卫生研究院; 中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2784949
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Based on mode coupling theory and the fundamental energy ratio definition of the electromechanical coupling coefficient, a unified formula has been derived to calculate the effective electromechanical coupling coefficient k(eff) of 0.70Pb(Mg1/3Nb2/3)O-3-0.30PbTiO(3) (PMN-30%PT) ferroelectric single crystal cylindrical resonator with arbitrary aspect ratio. The k(eff) dependence on resonator aspect ratio of PMN-30%PT crystal shows similar characteristics as that of the conventional piezoelectric ceramics Pb(ZrxTi1-x)O-3 (PZT). However, compared to PZT-5 ceramics, PMN-30%PT single crystal has a smaller aspect ratio where the k(eff) changes dramatically and there is also a stronger coupling between thickness and radial modes causing much larger mode splitting.
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