Enhanced electron-electron interaction, weak localization and electron-magnon scattering contributions to electrical resistivity in Fe- and Co-based metallic glass wires

Abstract

An extensive analysis of high-precision electrical resistivity (ρ) data taken on Fe- and Co- based metallic glass wires over the temperature range 10 K≤ T ≤ 300 K and discussion of the results, so obtained, in terms of the existing theoretical models identifies enhanced electron-electron interaction (EEI), weak localization (WL) and electron-magnon (EM) scattering as the main mechanisms governing the temperature dependence of ρ in these systems and determines their relative magnitudes accurately. Out of the inelastic processes that destroy phase coherence, inelastic electron-phonon scattering turns out to be the most effective one and its dephasing action persists to temperatures as high as 300 K. While EEI and WL effects are basically responsible for the negative temperature coefficient of resistivity (TCR), EM scattering accounts for the positive TCR. The observed resistivity minima are thus an outcome of these competing contributions to ρ(T).