Thermal spin transport and spin-orbit interaction in ferromagnetic/non-magnetic metals

TL;DR

This paper extends diffusion theory to include spin-dependent thermoelectricity and thermal transport, proposing new experiments to observe effects like the spin-Peltier effect and magnetic heat valve, supported by finite-element modeling.

Contribution

It introduces an extended diffusion model incorporating thermoelectric and thermal effects, along with spin-orbit interactions, and suggests novel experimental demonstrations.

Findings

Prediction of the spin-Peltier effect

Modeling of magnetic heat valve behavior

Inclusion of spin-orbit effects in thermal transport

Abstract

In this article we extend the currently established diffusion theory of spin-dependent electrical conduction by including spin-dependent thermoelectricity and thermal transport. Using this theory, we propose new experiments aimed at demonstrating novel effects such as the spin-Peltier effect, the reciprocal of the recently demonstrated thermally driven spin injection, as well as the magnetic heat valve. We use finite-element methods to model specific devices in literature to demonstrate our theory. Spin-orbit effects such as anomalous-Hall, -Nernst, anisotropic magnetoresistance and spin-Hall are also included in this model.