Intersublattice exchange coupling in rare earth–iron-based R-Fe–LT intermetallics (LT=light transition elements Ti, V)

The values of the d-sublattice magnetic moment ( M d) and the Gd–Fe exchange coupling parameter ( A GdFe) were derived for the R(Fe 1− x Ti x ) 2, R(Fe 1− x Ti x ) 3 and RFe 12− x V x (R=Gd, Lu and Y) compounds. As the Ti(V) concentration increases, a tendency of M d to decrease is found, whereas A...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2002-07, Vol.319 (1), p.17-20
Main Authors: Duc, N.H, Tan, N.D, Cong, B.T, Givord, D
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Exchange and superexchange interactions
Exchange interactions
Hybridization effects
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
Rare earth–transition metal compounds
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Summary:The values of the d-sublattice magnetic moment ( M d) and the Gd–Fe exchange coupling parameter ( A GdFe) were derived for the R(Fe 1− x Ti x ) 2, R(Fe 1− x Ti x ) 3 and RFe 12− x V x (R=Gd, Lu and Y) compounds. As the Ti(V) concentration increases, a tendency of M d to decrease is found, whereas A GdFe is enhanced. These behaviours are discussed in terms of the similar role of the 3d(Fe)–5d(R) and 3d(Fe)–3d(Ti,V) hybridizations on the negative polarization of both the 5d(R) and 3d(Ti,V) electrons. The arguments are reinforced by the analysis of the magnetic valence and a linear relationship between A GdFe and M d is presented.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(02)01101-8