On the spin‐disorder resistivity of amorphous ferromagnets

Abstract

Abstract The spin‐disorder resistivity of amorphous ferromagnets is investigated in the temperature regimes 0 ≦ T ≫ T C and T ≫ T C . The resistivity is calculated within the force–force correlation function method up to the second order in the sd‐exchange constant. A simple structural model for a structurally disordered Heisenberg ferromagnet is presented. At lowest temperatures the spin‐disorder resistivity varies as T 3/2 for a sufficient high degree of disorder. It is concluded that the experimentally observed T 2 ‐dependence at these temperatures is of non magnetic origin. This dependence can be qualitatively understood if the thermal smearing of the structure factor is taken into account.