A DIELECTRIC STUDY OF THE DOMAIN FREEZING IN KD2ASO4

被引：18

作者：

FALLY, M

KUBINEC, P

FUITH, A

WARHANEK, H

FILIPIC, C

机构：

[1] UNIV LJUBLJANA,JOZEF STEFAN INST,LJUBLJANA 61111,SLOVENIA

[2] TECH UNIV TRANSPORT & COMMUN,DEPT PHYS,ZILINA 01026,SLOVAKIA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 10期

关键词：

D O I：

10.1088/0953-8984/7/10/025

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The temperature- and frequency-dependent dielectric susceptibility of KD(2)ASO(4) was studied in the ferroelectric phase. A dispersion which is related to the dipole reversal was found in the high-frequency range (10(7) Hz). The dispersion is described by a Gaussian distribution of relaxation times [1] which show Vogel-Fulcher temperature dependences. The high value of the dielectric constant below the phase transition is related to the mobility of the domain walls. This mobility steeply decreases near the freezing temperature T-f and therefore a sudden decrease in the susceptibility takes place. A non-linear superposition of the piezoelectric resonance and the relaxational dispersion was observed.

引用

页码：2195 / 2204

页数：10

共 11 条

[1]

BARKLA HM, 1953, PHILOS MAG, V44, P109

[2] EXISTENCE OF DISLOCATIONS AT DOMAIN TIPS IN FERROELECTRIC CRYSTAL KH2 PO4 [J].