Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/33910
Title: Temperature dependence of dielectric constant and loss tangent in methyl ammonium aluminium alum
Authors: Rawat, Arvind Kumar
Upadhyay, Trilok Chandra
Keywords: Dielectric constant;Pseudospin-phonon interaction;Anharmonic interactions
Issue Date: Mar-2016
Publisher: NISCAIR-CSIR, India
Abstract: 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.
Page(s): 183-187
URI: http://hdl.handle.net/123456789/33910
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.54(03) [March 2016]

Files in This Item:
File Description SizeFormat 
IJPAP 54(3) 183-187.pdf214.87 kBAdobe PDFView/Open


Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.