Open AccessStudy of Ferroelectric Phase Transition in Triglycine Selenate Crystal
Author(s) -
Prabhat Chandra Khanduri,
Trilok Chandra Upadhyay
Publication year - 2021
Publication title -
journal of mountain research/journal of mountain research
Language(s) - English
Resource type - Journals
eISSN - 2582-5011
pISSN - 0974-3030
DOI - 10.51220/jmr.v16i2.28
Subject(s) - ferroelectricity , selenate , dielectric , phase transition , soft modes , crystal (programming language) , condensed matter physics , materials science , phase (matter) , nuclear magnetic resonance , chemistry , physics , optoelectronics , selenium , organic chemistry , computer science , metallurgy , programming language
Triglycine selenate (TGSe) is a Hydrogen bondend order disorder type ferroelectric, which go through a structural phase transition at Tc=295K. TGSe is very similar to the Triglycine Sulphate crystal, which is extensively used in infrared detection. In the present paper we are using double time thermal Green’s function method and modified pseudospin model todiscuss ferroelectric behavior of TGSe crystal. Expressions for shift, width, soft mode frequency, dielectric constant, loss and transition temperature have been evaluated. By fitting model values of physical quantities in the theoretical expressions thermal dependence of soft mode frequency, dielectric constant and loss have been calculated in the vicinity of transition temperature. Theoretical results are in well agreement with experimental results of other researchers.