Are {{Mn3Si}} and {{CuMnSb}} Antiferromagnetic Half-Metals?

The Heusler alloy Mn3Si and the semi-Heusler alloy CuMnSb order antiferromagnetically at low temperatures. The lack of magnetic field dependence of the antiferromagnetic order in these compounds, inferred from the resistivity, magnetization and specific heat up to are, however, incompatible with itinerant magnetism in the standard model of the metallic state. Here I discuss the possibility that this unusual stability may be related to a strongly reduced density of states of the minority charge carriers usually considered in the context of half-metallic ferromagnetism only.     «

The Heusler alloy Mn3Si and the semi-Heusler alloy CuMnSb order antiferromagnetically at low temperatures. The lack of magnetic field dependence of the antiferromagnetic order in these compounds, inferred from the resistivity, magnetization and specific heat up to are, however, incompatible with itinerant magnetism in the standard model of the metallic state. Here I discuss the possibility that this unusual stability may be related to a strongly reduced density of states of the minority charge c...     »