Spin Coulomb drag by non-equilibrium magnetic textures

TL;DR

This paper demonstrates that magnetization dynamics in conducting ferromagnets induce a spin-dependent motive force, leading to a spin Coulomb drag effect that acts as an intrinsic friction mechanism between spin channels.

Contribution

It introduces the concept of spin Coulomb drag caused by non-equilibrium magnetic textures, linking magnetization dynamics to electron spin transport.

Findings

Magnetization dynamics induce a spin-dependent motive force.

Spin Coulomb drag acts as an intrinsic friction mechanism.

The effect occurs when up-spin and down-spin electron velocities differ.

Abstract

Interaction between local magnetization and conduction electrons is responsible for a variety of phenomena in magnetic materials. We have shown that the spin-dependent motive force induced by magnetization dynamics in a conducting ferromagnet lead to the spin Coulomb drag effect. The spin Coulomb drag an intrinsic friction mechanism which operates whenever the average velocities of up-spin and down-spin electrons differ.