Temperature-dependent random field in relaxor ferroelectrics

被引：0
作者：
Ahn, SJ [1 ]
Kim, JJ
Kim, JH
Choo, WK
机构：
[1] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea
[2] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
来源：
JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2005年 / 46卷 / 01期
关键词：
relaxor ferroelectrics; Raman optical activity; random field; spin glass; dipolar relaxation;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Temperature dependence of random field is found to be intrinsic in a relaxor ferroelectric (RF) Pb(Yb1/2Nb1/2)O-3-PbTiO3 [PYN-PT] by Baman Optical Activity measurements. Its implications towards the formation of polar nanoregions (PNR) in the relaxor ferroelectrics are explored. Both inter-PNR. relaxation and intra-PNR. relaxation contributing to the very broad and complicated spectrum of relaxation are temperature-dependent and are analyzed by Vogel-Fulcher law and phonon-assisted tunneling model respectively.
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页码：350 / 353
页数：4
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