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IJPAP Vol.50 [2012] >
IJPAP Vol.50(03) [March 2012] >
| Title: | Temperature dependence of antiferroelectric mode frequency, dielectric constant and loss tangent of ADP crystal in presence of electric field |
| Authors: | Upadhyay, Trilok Chandra
Joshi, Deepak |
| Keywords: | Antiferroelectrics
Anharmonic Interactions
Green Function
Electric Field |
| Issue Date: | Mar-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A four sub-lattice pseudospin lattice coupled mode model modified with
third and fourth-order phonon anharmonic interaction terms and external
electric field terms has been considered for ADP crystal. Expressions for shift,
width, renormalized antiferroelectric mode frequency, dielectric constant and
loss tangent have been evaluated. Double-time thermal Green's function method
has been used for derivation. Fitting the values of model parameters in
expressions, the temperature dependence of antiferroelectric mode frequency dielectric
constant and loss tangent has been calculated in the presence of electric
field. Theoretical results agree well with data reported by Okada et al.
[Okada K, Sugie E, Kanno K &
Tada K, J Phys Soc Japan, 43 (1977)
557.] |
| Page(s): | 167-174 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(03) [March 2012]
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