Resistivity of Ferromagnetic Alloys

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Abstract
A theory is given for the spin‐dependent scattering contribution to the resistivity of a ferromagnetic alloy as a function of temperature, composition, and short‐range order. A spin‐dependent s‐d exchange interaction of the Zener‐Yosida type is assumed responsible for the major part of the scattering. Steady‐state pair correlations between spins in the ferromagnetic alloy are also considered in deriving the resistivity. On ignoring the effect of short‐range order on the electronic structure, the short‐range order is seen to affect both the temperature‐dependent and temperature‐independent parts of the scattering. For binary alloys of a monvalent metal solvent with transition element solutes, short‐range order tends to increase the resistivity relative to that of a random structure. Clustering tends to decrease it.