Evidence for a Magnetic Seebeck effect

TL;DR

This paper predicts a Magnetic Seebeck effect where temperature gradients influence magnetisation wave propagation, leading to asymmetric attenuation depending on wave direction, based on thermodynamic principles.

Contribution

It introduces the concept of a Magnetic Seebeck effect, providing a theoretical framework for how thermal gradients affect magnetisation wave dynamics.

Findings

Magnetisation waves are less attenuated when propagating with the temperature gradient.

Waves propagating against the temperature gradient are more attenuated.

The effect is analogous to the classical Seebeck effect in thermoelectrics.

Abstract

The irreversible thermodynamics of a continuous medium with magnetic dipoles predicts that a temperature gradient in the presence of magnetisation waves induces a magnetic induction field, which is the magnetic analog of the Seebeck effect. This thermal gradient modulates the precession and relaxation. The Magnetic Seebeck effect implies that magnetisation waves propagating in the direction of the temperature gradient and the external magnetic induction field are less attenuated, while magnetisation waves propagating in the opposite direction are more attenuated.