Brillouin scattering investigations of lead magnesium niobate-lead titanate single crystal

被引:1
|
作者
Shabbir, G [1 ]
Kojima, S [1 ]
机构
[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
关键词
ferroelectrics; relaxor; PMN-PT; morphotropic phase boundary; Brillouin scattering;
D O I
10.1016/j.ceramint.2003.12.148
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Lead magnesium niobate-lead titanate (PMN-PT) [001] single crystal of morphotropic phase boundary (MPB) composition; have been studied by 90A Brillouin scattering technique. Two phase transition anomalies were observed in the temperature dependences of Brillouin frequency shift (v) and full-width at half-maximum of the LA and TA modes at T similar to 336 and similar to415 K associated with symmetry changes from R3m to P4mm and P4mm to Pm (3) over barm, respectively. The observed spectra showed strong polarization dependence in cubic and tetragonal phases, whereas in rhombohedral phase both the VV- and VH-scattering spectra were similar. This effect was attributed to the rotation of spontaneous polarization due to change of symmetry from P4mm to R3m. (C) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:1707 / 1710
页数:4
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