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A density functional theory based two-terminal scattering formalism thatincludes spin-orbit coupling and spin non-collinearity is described. Animplementation using tight-binding muffin-tin orbitals combined with extensiveuse of sparse matrix techniques allows a wide variety of inhomogeneousstructures to be flexibly modelled with various types of disorder includingtemperature induced lattice and spin disorder. The methodology is illustratedwith calculations of the temperature dependent resistivity and magnetizationdamping for the important substitutional disordered magnetic alloy Permalloy(Py), Ni$_{80}$Fe$_{20}$. Comparison of calculated results with recentexperimental measurements of the damping (including its temperature dependence)indicates that the scattering approach captures the most importantcontributions to this important property.

physical review. b./physical review. b

Calculating the transport properties of magnetic materials from  first-principles including thermal and alloy disorder, non-collinearity and  spin-orbit coupling