Temperature dependence of dielectric constant and loss tangent in methyl ammonium aluminium alum

被引：0
|
作者：
Rawat, Arvind Kumar [1 ]
Upadhyay, Trilok Chandra [1 ]
机构：
[1] HNB Garhwal Univ, Dept Phys, Srinagar 246174, Uttarakhand, India
来源：
INDIAN JOURNAL OF PURE & APPLIED PHYSICS | 2016年 / 54卷 / 03期
关键词：
Dielectric constant; Pseudospin-phonon interaction; Anharmonic interactions;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A model of pseudospin-lattice coupled mode for methyl ammonium aluminium alum (MASD) has been modified to include cubic and quartic phonon anharmonic interactions. With the help of double-time temperature dependent Green's function method and modified Hamiltonian, expressions for soft mode frequency, dielectric constant and loss tangent have been evaluated. By fitting model values of physical quantities in the theoretical expressions, temperature dependence of soft mode frequency, dielectric constant and loss tangent have been obtained and compared with experimental results of Pepinsky et al.(15), which show a good agreement.
引用
收藏
页码：183 / 187
页数：5
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