Enhancement of magnetism of Fe by Cr and V
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by
Masako Ogura, Hisazumi Akai, Junjiro Kanamori
2011
Abstract
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
N\'eel temperature. Such heterostructures could be used to increase a magnetic
anisotropy of permanent magnets.
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