Brillouin spectroscopy of relaxor ferroelectrics and metal hydrides

被引：1
|
作者：
Ahart, Muhtar
Asthagiri, Aravind
Cohen, R. E.
Yarger, Jeffery L.
Mao, Ho-kwang
Hemley, Russell J.
机构：
[1] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA
[2] Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 442卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
Brillouin scattering; relaxor ferroelectrics; piezoelectricity; amorphous BeH2; equation of state;
D O I：
10.1016/j.msea.2006.02.224
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A complete set of elastic and piezoelectric constants for single-domain rhombohedral Pb(Zn1/3Nb2/3)O-3-4.5%PbTiO3 is obtained using Brillouin scattering. The bulk modulus and elastic constants agree with the values obtained from ultrasonic methods, but the piezoelectric constants are smaller. Differences in piezoelectric constants from different techniques are due to frequency dispersion and the contributions of domain boundaries. The pressure dependence of the Brillouin shifts of amorphous BeH2 was measured from ambient pressure to 17 GPa. The equation of state is deduced from the pressure dependence of the sound velocity; the bulk modulus is 14.2 (3.0) GPa and its pressure derivative is 5.3 (0.5). (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：519 / 522
页数：4
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