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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
IJPAP Vol.49(10) [October 2011] >
| Title: | Microwave absorption in antiferroelectric tin chloride dihydrate crystal |
| Authors: | Upadhyay, Trilok Chandra
Kumar, Pramod |
| Keywords: | Antiferroelectrics
Microwave absorption
Green’s function
Anharmonic interaction |
| Issue Date: | Oct-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Two-sublattice pseudospin lattice coupled mode
model of Mitsui [Phys Rev, 111 (1958)
1259] is modified by adding along with third-and-fourth order phonon anharmonic
interaction terms for SnCl2·2H2O crystal. With the
help of double-time thermal Green's function method, expressions for shift,
width, renormalized AFE soft mode frequency, Curie temperature, dielectric
constant and microwave absorption are obtained for tin chloride dihydrate
crystal. By fitting model values of physical quantities, temperature dependence
of AFE soft frequency, dielectric constant and microwave absorption have been
calculated for tin chloride dihydrate crystal. Theoretical results are compared
with experimental results of Mognaschi et al. [Phys Rev, B14 (1976) 2005]. |
| Page(s): | 686-691 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.49(10) [October 2011]
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