Normal-incommensurate phase transition in (Sr1-xBax)2Nb2O7 ferroelectric single crystals

被引：11
|
作者：
Shabbir, G
Akishige, Y
Kojima, S [1 ]
机构：
[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[2] PRD PINSTECH, Islamabad, Pakistan
[3] Shimane Univ, Fac Educ, Matsue, Shimane 6908504, Japan
来源：
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2005年 / 6卷 / 06期
关键词：
phase transition; inelastic light scattering; acoustic properties;
D O I：
10.1016/j.stam.2005.05.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Micro-Brillouin and Raman light scattering experiments were performed on (Sr1-x,Ba-x)(2)Nb2O7 single crystals to investigate the effect of Ba addition on the normal-incommensurate phase transition. From the Brillouin frequency shift results, it was observed that the onset temperature of the normal-incommensurate phase decreased with increasing Ba concentration. This was associated to the suppression of the octahedra tilting due to substitution of larger ion on the A-site. The Raman intensity of the Q soft mode measured at room temperature also showed a similar behaviour with increasing x. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：656 / 659
页数：4
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