Dynamic properties of relaxor ferroelectrics

被引:57
作者
Glinchuk, MD
Stephanovich, VA
机构
[1] Ukrainian Acad Sci, Inst Problems Mat Sci, UA-252180 Kiev, Ukraine
[2] Ukrainian Acad Sci, Inst Semicond, UA-252028 Kiev, Ukraine
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.369316
中图分类号
O59 [应用物理学];
学科分类号
摘要
We calculate the dynamic order parameter and dielectric susceptibility for the relaxor ferroelectrics like PbMg1/3Nb2/3O3, PbSc1/2Ta1/2O3 and Pb1-xLaxZryTi1-yO3. Calculations of temperature and frequency dependence of dielectric susceptibility show the existence of low-and high-temperature group of maxima obeyed to Vogel-Fulcher (VF) and Arrhenius laws, respectively. The VF law and non-Debye relaxation behavior as well as the stretched exponential law of susceptibility time decay were shown to be the consequence of random fields distribution which transforms single dipole Arrhenius and Debye laws into VF and non-Debye, stretched exponential laws, respectively. Comparison of observed and calculated characteristics of the relaxors is carried out. (C) 1999 American Institute of Physics. [S0021-8979(99)00703-3].
引用
收藏
页码:1722 / 1726
页数:5
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