甲基铵铝明矾介电常数和损耗正切的温度依赖性

IF 0.6 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Indian Journal of Pure & Applied Physics Pub Date : 2016-03-22 DOI:10.7598/cst2016.1206

A. Rawat

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引用次数: 0

摘要

修正了甲基铵铝明矾(MASD)的赝自旋-晶格耦合模式模型，使其包含立方和四次声子非调和相互作用。利用双时间温度相关格林函数法和修正哈密顿量，求出了软模频率、介电常数和损耗正切的表达式。通过拟合理论表达式中物理量的模型值，得到了软模频率、介电常数和损耗正切与温度的依赖关系，并与Pepinsky et al. 15的实验结果进行了比较，结果吻合较好。

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

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.

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来源期刊

Indian Journal of Pure & Applied Physics 物理-物理：综合

CiteScore

1.30

自引率

14.30%

发文量

审稿时长

7 months

期刊介绍： Started in 1963, this journal publishes Original Research Contribution as full papers, notes and reviews on classical and quantum physics, relativity and gravitation; statistical physics and thermodynamics; specific instrumentation and techniques of general use in physics, elementary particles and fields, nuclear physics, atomic and molecular physics, fundamental area of phenomenology, optics, acoustics and fluid dynamics, plasmas and electric discharges, condensed matter-structural, mechanical and thermal properties, electronic, structure, electrical, magnetic and optical properties, cross-disciplinary physics and related areas of science and technology, geophysics, astrophysics and astronomy. It also includes latest findings in the subject under News Scan.