NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.48 [2010] >
IJPAP Vol.48(08) [August 2010] >

Title: Temperature dependence of soft mode frequency, dielectric constant and loss tangent in PbHPO4 crystal in presence of electric field
Authors: Upadhyay, Trilok Chandra
Joshi, Mayank
Keywords: Dielectric constant
Green’s function
Anharmonic interactions
Issue Date: Aug-2010
Publisher: CSIR
Abstract: An extended two sublattice pseudospin lattice coupled mode model by adding third and fourth-order phonon anharmonic interactions terms as well as external electric field term has been considered for lead hydrogen phosphate crystal and its isomorphs. With the help of double-time temperature dependent Green’s function method, theoretically, expressions for shift, width, soft mode frequency, dielectric constant and loss tangent are derived. By fitting model values in the theoretical expressions, temperature and electric field dependence of soft mode frequency, dielectric constant and loss tangent is calculated for PbHPO4 crystal in presence of electric field. The theoretical results compared with experimental results of Smutny and Fousek [Ferroelectrics, 21 (1978) 385] show good agreements.
Page(s): 550-555
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.48(08) [August 2010]

Files in This Item:

File Description SizeFormat
IJPAP 48(8) 550-555.pdf742.2 kBAdobe PDFView/Open
 Current Page Visits: 112 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 165034 since 01-Sep-2015  Last updated on 27-Jun-2016Webmaster: