FREQUENCY-DOMAIN DIELECTRIC STUDIES IN LIFCA2+

被引：0
|
作者：
PAPATHANASSIOU, AN
GRAMMATIKAKIS, J
BOGRIS, NG
机构：
[1] University of Athens, Department of Physics, Section of Solid State Physics, Panepistimiopolis, GR 15784 Zografos, Athens
来源：
PHYSICAL REVIEW B | 1994年 / 49卷 / 20期
关键词：
D O I：
10.1103/PhysRevB.49.14160
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dielectric losses and conductivity studies in LiF:Ca2+ crystals were performed in the dissociation region in the frequency range from 5 to 500 kHz. Two dipolar contributions are revealed. The energy parameters of the high-frequency loss peak evidences the rotation of an impurity-cation vacancy dipole by NN --> NN jumping of the bound-cation vacancy. This result is in agreement with previously reported ionic thermocurrent data of ours and directs us to the conclusion that the migration enthalpy of the bound cation vacancy decreases as a function of the ionic radius of the impurity.
引用
收藏
页码：14160 / 14164
页数：5
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