Abstract
An extended two sublattice pseudospin lattice coupled mode model of Chaudhuri et al [Phys.Rev.338 (1988) 689] by adding third and fourth‐order phonon anharmonic interactions terms is considered for triglycine sulphate (CH2NH2COOH)3H2SO4 crystal and its isomorphs. With the help of double‐time temperature dependent Green's function method, expressions for shift,width, soft mode frequency, dielectric constant and loss tangent are derived. By fitting model values in the theoritical expressions, temperature dependence of soft mode frequency, dielectric constant and loss tangent are calculated. The theoretical results compare well with experimental results of Aravazhi et al [Ferroelectrics200 (1997) 279.]
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
