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IJPAP Vol.50 [2012] >
IJPAP Vol.50(04) [April 2012] >
| Title: | Temperature dependence of width and soft mode frequency in sodium potassium tantalate mixed system |
| Authors: | Uniyal, Manish
Bhatt, S C |
| Keywords: | Model Hamiltonian
Dielectric Constant
Soft Mode Frequency
Width |
| Issue Date: | Apr-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Considering a quadratic anharmonic model Hamiltonian and using Green's
function and Dyson’s equation technique, expressions for the width in the
frequency response for mixed perovskite type ferroelectrics and soft mode
frequency have been obtained. Using the experimentally observed dielectric
constant and loss tangent for Na1-xKxTaO3
(where x = 0, 0.2, 0.4, 0.5 and 0.6) the temperature dependence of soft
mode width and frequency in these samples at 10 kHz has been calculated. |
| Page(s): | 248-251 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(04) [April 2012]
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