Low temperature piezoelectric and dielectric properties of lead magnesium niobate titanate single crystals

被引：4
|
作者：
Guo, Wei [1 ]
Jin, Dafei
Wei, Wanchun
Maris, Humphrey J.
Tian, Jian
Huang, Xingling
Han, Pengdi
机构：
[1] Brown Univ, Dept Phys, Providence, RI 02912 USA
[2] HC Mat Corp, Bolingbrook, IL 60440 USA
来源：
JOURNAL OF APPLIED PHYSICS | 2007年 / 102卷 / 08期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1063/1.2798879
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Lead magnesium niobate-lead titanate (PMN-xPT) single crystal plates were prepared close to the morphotropic phase boundary with PT compositions 27%-31%. The piezoelectric and dielectric properties of these plates at liquid-helium temperature (4.2 K) were obtained by fitting measured impedance curves. In particular, the piezoelectric strain constant e(33) is found to be in the range of 5.1-5.7 C m(-2) at 4.2 K, which indicates an extraordinarily large piezoelectric effect compared with other materials even at such a low temperature. This result shows that PMN-xPT single crystals are promising candidates for ultrasonic transducers at low temperatures.
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页数：4
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