Indirect-exchange interactions in disordered metals at finite temperature
Phys. Rev. B 46, 5318 – Published 1 September, 1992
DOI: https://doi.org/10.1103/PhysRevB.46.5318
Abstract
We calculate the effective indirect-exchange interaction between spin-spin pairs in disordered metals. The primary features of this work are that we include intrinsic sd exchange scattering and explicitly retain finite temperature in our results. Intrinsic sd exchange scattering introduces length scales that strongly affect the structure of the effective interaction. Finite temperature imposes a strictly finite range on the interaction. Finite temperature and sd scattering play essential roles in establishing the dependence on impurity concentration of the effective interaction in disordered systems such as metallic spin glasses and dilute ferromagnets.