COLLECTIVE DYNAMICS OF OFF-CENTER IONS IN K1-XLIXTAO3 - A MODEL OF RELAXOR BEHAVIOR

被引：120

作者：

TOULOUSE, J

VUGMEISTER, BE

PATTNAIK, R

机构：

[1] Physics Department, Lehigh University, Bethlehem

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.73.3467

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The relaxor behavior is characteristic of the class of disordered ferroelectrics. These systems possess a high dielectric constant with a broad relaxation peak and a low frequency dispersion. Because of their complexity, there exist various explanations for their dielectric and polarization behavior, but no unifying model. In the present paper we show that the simpler system, K1-xLixTaO3, is also a relaxor and a generic one at that. We describe its dynamical behavior with a general microscopic model and show that the relaxor behavior is intrinsically due to the dipolar interaction between randomly distributed off-center ions mediated by a highly polarizable lattice. © 1994 The American Physical Society.

引用

页码：3467 / 3470

页数：4

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