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A binary ferromagnetic alloy with magnetic moments dependent on local environment. I. The Jaccarino‐Walker Model in the effective field approximation
Author(s) -
Zaborov A. V.,
Medvedev M. V.
Publication year - 1983
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221160127
Subject(s) - condensed matter physics , ferromagnetism , magnetic moment , curie temperature , percolation (cognitive psychology) , heisenberg model , physics , binary number , exchange interaction , magnetic field , binary alloy , alloy , materials science , quantum mechanics , mathematics , arithmetic , neuroscience , composite material , biology
A binary ferromagnetic alloy, in which the magnetic moments depend on their local chemical environment in a step‐like manner (the Jaccarino‐Walker model), is considered. It is assumed that Heisenberg exchange interactions of the nearest neighbours are responsible for the ferromagnetic ordering of these magnetic moments. Both, the Curie temperatures versus concentration and the percolation thresholds of the existence of the long‐range magnetic order are investigated for different variants of dependences of both the magnetic components on their local environments. The spin‐wave spectrum is analyzed as well.