Soft mode and acoustic mode ferroelectric properties of deuterated triglycine sulphate crystal

被引：0
|
作者：
ASHISH NAUTIYAL
TRILOK CHANDRA UPADHYAY
机构：
[1] H N B Garhwal University,Physics Department
来源：
Bulletin of Materials Science | 2014年 / 37卷
关键词：
Pseudo spin–phonon interaction; anharmonic interactions; Green’s function.;
D O I：
暂无
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学科分类号：
摘要：
A mathematical study about deuterated triglycine sulphate (CD2CD2COOD)3D2SO4 crystal by a theoretical model which is extended with two sublattice pseudospin lattice coupled mode model by adding third, fourth and fifth order phonon anharmonic interaction terms as well as external electric field term in the crystal Hamiltonian. Double-time temperature dependent Green’s function is used to derive soft mode frequency, dielectric permittivity, microwave absorption, quality factor, acoustic attenuation, electric conductivity, smooth function, relaxation time, ratio of figure of merits and respective applications in modern technologies. All theoretical results have a good agreement with experimental data.
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页码：133 / 140
页数：7
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