Some comments on the magnetic moments used in REFe2 exchange spring micro-magnetic simulations

The current status of magnetic moments used in micro-magnetic modelling of the Laves phase rare earth iron REFe(2) inter-metallic compounds is reviewed. In particular, it is argued that both the neutron scattering results and band structure calculations provide little support for the long-held view...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Condensed matter 2010-07, Vol.22 (29), p.291001-291001
Main Authors: Bowden, G J, Buckingham, A R, Stenning, G B G, de Groot, P A J
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Critical-point effects, specific heats, short-range order
Exact sciences and technology
Magnetic properties and materials
Numerical simulation studies
Physics
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The current status of magnetic moments used in micro-magnetic modelling of the Laves phase rare earth iron REFe(2) inter-metallic compounds is reviewed. In particular, it is argued that both the neutron scattering results and band structure calculations provide little support for the long-held view that the Fe 3d moments are constant across the REFe(2) series, and for the oft-used rule of thumb that the (57)Fe hyperfine field is proportional to the Fe magnetic moment. Nevertheless, it is argued that it is acceptable to employ a simple ferrimagnetic model, in which the free-ion moment is ascribed to the RE ion and a moment of μ(d) = μ(3d) + μ(5d)≈1.5 µ(B) is used for the combined Fe(3d) and Fe-driven RE(5d) moments.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/22/29/291001