Polarizability investigation by first order phase transition in the self-consistent phonon approximation for PSN system

被引：0

作者：

Uniyal, Manish ^{[1
]}

Bhatt, S. C. ^{[1
]}

机构：

[1] Univ Srinager Garhwal, Dept Phys, HNB Garhwal, Srinager Garhwal 246174, Uttarakhand, India

来源：

INDIAN JOURNAL OF PURE & APPLIED PHYSICS | 2014年 / 52卷 / 06期

关键词：

Phase transition; Model Hamiltonian; Ferroelectrics; FREQUENCY; TEMPERATURE; DEPENDENCE; WIDTH;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Considering a quadratic Anharmonic model Hamiltonian and using double time temperature dependent Green's function method and Dyson's equation treatment, expression for polarizablity in the frequency response for mixed perovskite type ferroelectrics has been obtained. Using the experimentally observed temperature dependent dielectric constant, loss tangent, soft mode frequency and width for Na1-x KxNbO3 (where x = 0, 0.4 and 0.5), the polarizablity has been calculated for these samples at 10 and 100 kHz.

引用

页码：391 / 394

页数：4

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