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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
IJPAP Vol.49(02) [February 2011] >
| Title: | Electric field dependence of Curie temperature in BaxSr1-xTiO3 ferroelectric perovskites |
| Authors: | Kukreti, Ashish
Kumar, Ashok
Naithani, U C |
| Keywords: | Anharmonicity
Defect
Electric dipole moment
Curie-Weiss law |
| Issue Date: | Feb-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Electric
field dependence of Curie temperature in an anharmonic poly crystalline mixture
of BaxSr1-xTiO3 has been calculated in its paraelectric phase from the
Silverman-Joseph-Hamiltonian augmented with fourth-order phonon coordinates
using double time Green’s functions technique. The field and impurity
dependence of the shift in the
Curie temperature has been studied. The Curie temperature increases linearly
with increase of the external electric field
and impurity concentration(x) in the BaxSr1-xTiO3 ferroelectric perovskites.
It follows the Curie-Weiss law above the transition temperature in the
paraelectric region. The results are in good agreement with previous experimental
and theoretical result |
| Page(s): | 126-131 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.49(02) [February 2011]
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