Effect of spin fluctuations on resistivity

Abstract

The resistivity of Coles alloys, which decreases as temperature decreases at low temperatures, has been explained in terms of the scattering of electrons by spin fluctuations. The ‘universal curve’ derived for spin-fluctuation resistivity appears to describe the key feature of resistivity behaviour at lower temperatures in many different systems: dilute transition-metal alloys in which host and impurity are similar (Coles alloys), ferromagnetic alloys near the critical concentration, nearly magnetic elements and compounds (including actinide-based systems), amorphous transition-metal alloys, and some models for high-temperature superconductors.