Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/10939
Title: Electric field dependence of Curie temperature in Ba<sub>x</sub>Sr<sub>1</sub><sub>-x</sub>TiO<sub>3</sub> 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 Ba<sub>x</sub>Sr<sub>1</sub><sub>-x</sub>TiO<sub>3 </sub>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(<i style="">x</i>) in the Ba<sub>x</sub>Sr<sub>1</sub><sub>-x</sub>TiO<sub>3</sub> 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
Description: 126-131
URI: http://hdl.handle.net/123456789/10939
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.49(02) [February 2011]

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