Curie-Temperature Variation and Microwave Absorption in Perovskites Containing Substitutional Impurities

M. S. Yadav and S. C. Deorani

Theoretical Physics Division, Department of Physics, R. R. Autonomous College Alwar - 301001 (India).

DOI : http://dx.doi.org/10.13005/msri/070225

ABSTRACT:

Using thermal-double time Green?s function method, Fourier transform and Dyson?s equation, theoretical expressions are obtained for Curie-temperature and microwave absorption coefficient for a ferroelectric cubic crystal containing defect (substitutional impurities). Chang in Curie-temperature occures due to impurity content in the crystal. Microwave loss deviates from Curie-Wiess law at high temperature due to ?T2 term being significant.

KEYWORDS: Curie-temperature; Green?s function; Hamiltonion; Microwave loss; Dyson?s equation

Copy the following to cite this article: Yadav M. S, Deorani S. C. A Curie-Temperature Variation and Microwave Absorption in Perovskites Containing Substitutional Impurities. Mat.Sci.Res.India;7(2)

Copy the following to cite this URL: Yadav M. S, Deorani S. C. A Curie-Temperature Variation and Microwave Absorption in Perovskites Containing Substitutional Impurities. Mat.Sci.Res.India;7(2). Available from: http://www.materialsciencejournal.org/?p=2439

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