Spin transport in magnetically ordered systems: effect of the lattice relaxation time

TL;DR

This paper investigates how the dynamic relaxation time of lattice spins influences spin resistivity in magnetic materials, using Monte Carlo simulations to reveal material-dependent behaviors near magnetic phase transitions.

Contribution

It introduces the effect of lattice spin relaxation time on spin resistivity, providing new insights through Monte Carlo simulation results.

Findings

Spin resistivity varies significantly with lattice spin relaxation time.

Material-specific differences in spin resistivity are observed.

The study offers a unified perspective on spin resistivity behavior near phase transitions.

Abstract

Spin resistivity $R$ has been shown to result mainly from the scattering of itinerant spins with magnetic impurities and lattice spins. $R$ is proportional to the spin-spin correlation so that its behavior is very complicated near and at the magnetic phase transition of the lattice spins. For the time being there are many new experimental data on the spin resistivity going from semiconductors to superconductors. Depending on materials, various behaviors have been observed. There is however no theory so far which gives a unified mechanism for spin resistivity in magnetic materials. Recently, we have showed Monte Carlo results for different systems. We found that the spin resistivity is very different from one material to another. In this paper, we show for the first time how the dynamic relaxation time of the lattice spins affects the resistivity of itinerant spins observed in Monte Carlo simulation.