SPONTANEOUS AND FIELD-ASSISTED TRANSITION IN K0.984LI0.016TAO3 - THE POLAR PATTERN BY BIREFRINGENCE AND 2ND-HARMONIC GENERATION

被引：11

作者：

BANFI, GP ^{[1
]}

CALVI, P ^{[1
]}

GIULOTTO, E ^{[1
]}

机构：

[1] UNIV PAVIA,DEPT ELETTRON,I-27100 PAVIA,ITALY

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.51.6231

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report birefringence and second-harmonic-generation measurements in K0.984Li0.016TaO3 at temperatures between 55 and 10 K. On cooling, the local spontaneous polarization grows from 1 to 30 mC/m2. We find, however, that its correlation length obtains the value of 8 nm at 55 K and remains unchanged on further cooling. It appears that a "frozen" polar length scale arises from the interaction of the Li dipoles well above the usually defined transition temperature (36 K). © 1995 The American Physical Society.

引用

页码：6231 / 6236

页数：6

共 32 条

[1] X-RAY-SCATTERING STUDY OF THE RANDOM ELECTRIC-DIPOLE SYSTEM KTAO2-LI [J].