Influence of complex disorder on skew-scattering Hall effects inL10-ordered FePt alloy

One of the key mechanisms for transverse spin-current generation in metals is the electron skew scattering off defects and impurities, where the spin-orbit interaction leads to an effective deflection of the electrons away from the direction of an applied electric field. Recently, there has been an intensive interest in the skew-scattering part of the Hall effects in an important spintronics material, $L{1}₀$-ordered FePt alloy, where conflicting data with regard to the skew-scattering magnitude have been reported in previous studies. To understand the reason for this controversy, the authors considered various sources of scattering in FePt and determined the skew scattering Hall angles from microscopic density functional theory calculations and Boltzmann transport theory. Based on their results, the authors are able to explain the extreme spread of available data for FePt with drastic dependence of the skew-scattering properties on the details of disorder.