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Interaction of atomic order with itinerant ferromagnetism
Author(s) -
Billard L.,
Villemain P.,
Chamberod A.
Publication year - 1977
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.2220840135
Subject(s) - ferromagnetism , condensed matter physics , curie temperature , generalization , character (mathematics) , electron , physics , curie , materials science , quantum mechanics , mathematics , mathematical analysis , geometry
The simultaneous occuring of atomic ordering and ferromagnetic ordering is described in a mean field approximation for an alloy where magnetic properties are due to the itinerant character of electrons: thus a generalization of the Stoner‐Wohlfarth model is proposed for the case of nondisordered ferromagnetic alloys. Treating first the non‐magnetic case, when the intra‐atomic correlation parameter U is not too high, a higher ordering temperature is obtained than in the Bragg‐Williams case; considering then the (weak) ferromagnetic case, also an increase of the Curie temperature is found. However, different situations can occur, according to the choice of the model density of states.