Surface acoustic wave propagation in Y- and Z-cut 0.67PbMgNbO3-0.33PbTiO3 single crystals

被引：9
作者：
Li, Xiuming [1 ,2 ]
Zhang, Rui [1 ]
Huang, Naixing [1 ]
Lue, Tianquan [1 ]
Cao, Wenwu [1 ,3 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 150080, Heilongjiang, Peoples R China
[2] Daqing Normal Univ, Dept Phys, Daqing 163712, Heilongjiang, Peoples R China
[3] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 05期
关键词：
acoustic wave propagation; dielectric polarisation; electromechanical effects; lead compounds; relaxor ferroelectrics; surface acoustic waves; LA3GA5SIO14; LANGASITE; GROWTH;
D O I：
10.1063/1.3211922
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Surface acoustic wave (SAW) propogation in Y-cut and Z-cut relaxor-based 0.67Pb(Mg1/3Nb2/3)O-3-0.33PbTiO(3) (PMN-33%PT) ferroelectric single crystals poled along [001](c) cubic direction has been analyzed theoretically. Characteristic curves were obtained for the phase velocity, electromechanical coupling coefficient and PFA of SAW in Y-cut and Z-cut PMN-33%PT single crystals. It was found that the phase velocity is lower, while the electromechanical coupling coefficient is much higher, than that of traditional piezoelectric materials. The power flow angle (PFA) can be zero in certain directions, which makes this crystal system a promising material for future SAW devices with smaller size and enhanced performance. The directions near 45 degrees and 135 degrees of Y-cut PMN-33%PT crystals are found to be optimum directions for SAW device applications.
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页数：4
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