RECENT ADVANCES IN THE THEORY OF MAGNETISM OF NiAs-TYPE TRANSITION-METAL CHALCOGENIDES AND PNICTIDES

Abstract:

Magnetism of NiAs-type transition-metal compounds is studied from the viewpoint of the itinerant electron. Electronic nonmagnetic bands of MAs and MSb (M = Cr, Mn, Fe, Co, Ni) and ferromagnetic bands of MnAs and MnSb are calculated by the self-consistent APW method. The obtained ferromagnetic moments are in good agreement with observations. The anomalous temperature dependence of the paramagnetic susceptibility observed in MnAs, MnAs l_,P~, FeAs and CoAs is well explained on the basis of spin fluctuation theory, by taking account of characteristic behavior of the density of states obtained for each compound.

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http://dx.doi.org.sci-hub.cc/10.1016/0304-8853(87)90346-5