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Study of spinels using the BPW method

DSpace at IIT Bombay

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Field Value
 
Title Study of spinels using the BPW method
 
Creator GOVEAS, N
MUKHOPADHYAY, G
 
Subject garnets
exchange constants
spinels - ferrimagnetic
heisenberg model
susceptibility - magnetic
 
Description We present a study of a group of B-site spinel ferrimagnetic compounds having magnetic properties dominated by strong ferromagnetic interactions, using a modified Bethe-Peierls-Weiss (BPW) method. We obtain the exchange parameters by studying the transition temperature and the inverse susceptibility curves. We use a method for obtaining the exchange constants using the ratio between the transition temperatures obtained by the Weiss molecular field theory and a more advanced theory, such as high temperature expansion, and compare the ratio with the experimental data. We also study the inverse magnetic susceptibility curves which, for the case of dominant ferromagnetic interactions, are linear in the high temperature limit and have nonlinear behaviour near the transition temperature. In particular, we study systems such as MCr(2)X(4), where M = Cd,Hg and X = S,Se, which are ferrimagnetic spinels, for which we find excellent fits to the experimental magnetic susceptibility data using the modified BPW method.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-26T20:36:33Z
2011-12-26T12:55:51Z
2011-12-27T05:42:56Z
2011-07-26T20:36:33Z
2011-12-26T12:55:51Z
2011-12-27T05:42:56Z
1997
 
Type Article
 
Identifier JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 167(3), 269-273
0304-8853
http://dx.doi.org/10.1016/S0304-8853(96)00637-3
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7017
http://hdl.handle.net/10054/7017
 
Language en