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Abstract:
A concept is presented serving to guide in the search for materials with
high spin polarization. It is shown that the magnetic moment of
half-metallic ferromagnets can be calculated from the generalized
Slater-Pauling rule. Furthermore, it was found empirically that the
Curie temperature of Co-2-based Heusler compounds can be estimated from
a seemingly linear dependence on the magnetic moment. As a successful
application of these simple rules, it was found that Co2FeSi is,
actually, the half-metallic ferromagnet exhibiting the highest magnetic
moment and the highest Curie temperature measured for a Heusler
compound.
