Enhancement of Magnetism of Fe by Cr and V

Enhancement of magnetism of Fe that occurs by alloying with Cr or V is discussed on the basis of first-principles electronic structure calculation. The d states of Fe next to Cr(V) are pushed down to the lower energy side compared to those of pure Fe due to the hybridization with Cr(V)d states, whic...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2011-10, Vol.80 (10), p.1-1
Main Authors: Ogura, Masako, Akai, Hisazumi, Kanamori, Junjiro
Format: Article
Language:English
Subjects:
Anisotropy
Atoms & subatomic particles
Band structure
Chromium
Chromium base alloys
Couplings
Electronic structure
Heterostructures
Iron
Magnetism
Mathematical analysis
Temperature effects
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Summary:Enhancement of magnetism of Fe that occurs by alloying with Cr or V is discussed on the basis of first-principles electronic structure calculation. The d states of Fe next to Cr(V) are pushed down to the lower energy side compared to those of pure Fe due to the hybridization with Cr(V)d states, which leads a Co-like electronic structure for the Fe atom. This enhances magnetic moments of other Fe atoms and also the exchange couplings among them. The same mechanism works as well for the magnetism of Fe/Cr heterostructures. The idea is extended to design of a new type of antiferromagnets with high Neel temperature. Such heterostructures could be used to increase a magnetic anisotropy of permanent magnets.
ISSN:0031-9015
1347-4073