Designing a Spin-Seebeck Diode

TL;DR

This paper explores how thermal gradients can control spin wave modes in a spin-valve bi-layer, enabling energy and magnetization flow rectification with potential applications in spin caloritronics and nanophononics.

Contribution

It introduces a method to selectively excite and synchronize spin wave modes using thermal gradients, advancing spin caloritronics device design.

Findings

Thermal gradients can excite specific spin wave modes.

Synchronization of magnetization precession is achievable.

Rectification of energy and magnetization flows is demonstrated.

Abstract

Using micromagnetic simulations, we have investigated spin dynamics in a spin-valve bi-layer in the presence of a thermal gradient. The direction and the intensity of the gradient allow to excite the spin wave modes of each layer selectively. This permits to synchronize the magnetization precession of the two layers and to rectify the flows of energy and magnetization through the system. Our study yields promising opportunities for applications in spin caloritronics and nanophononics devices.