Abstract

It has been shown by comparing the results of studying the electrical and magnetic properties of the halfmetallic ferromagnetic Heusler alloys Co 2CrAl and Co2CrGa with the calculations of their elec� tronic structure that high values of the electrical resistivity ρ are caused by a disordered distribution of atoms over the sites of the L21 cubic structure, and the anomalous behavior of ρ(T) is associated with the transfor� mation of the electronic spectrum due to the ferromagnetictoparamagnetic transition.

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