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A simple model approach to localized‐itinerant magnetism application to rare‐earth intermetallics
Author(s) -
Iannarella L.,
Guimarães A. P.,
Da Silva X. A.
Publication year - 1982
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.2221140130
Subject(s) - magnetism , condensed matter physics , rare earth , magnetic moment , intermetallic , electron , exchange interaction , transition metal , electronic band structure , simple (philosophy) , physics , moment (physics) , chemistry , materials science , ferromagnetism , quantum mechanics , mineralogy , biochemistry , organic chemistry , alloy , catalysis , philosophy , epistemology
Abstract The combined role of intraband and electron‐localized moment exchange in determining the magnetic behaviour of a system composed of itinerant electrons and localized magnetic moments is investigated. Having in mind rare‐earth–transition metal and rare‐earth–normal metal intermetallic compounds, the critical temperature versus de Gennes factors and the temperature dependence of the magnetizations and susceptibilities of the two magnetic species are studied. Results are obtained for two cases, a) a delta‐like band (narrow band limit), and b) a parabolic density of states, using the molecular field approximation both in the treatment of intraband interaction (Stoner‐like description) and electron‐localized spin exchange. Some comments are made on the parallel between computed and measured magnetic quantities in the systems RAl 2 , RFe 2 and R(Fe 1– x Al x ) 2 (0 < x < 1 and R heavy rare‐earth).