From Chaotic Spin Dynamics to Non-collinear Spin Textures in YIG Nano-films by Spin Current Injection

TL;DR

This paper numerically investigates nonlinear spin dynamics in YIG thin-films under spin current injection, revealing various regimes including solitons, chaos, non-collinear textures, and homogeneous switching.

Contribution

It provides new insights into the complex spin behaviors and phase transitions in YIG films driven by spin currents, highlighting the emergence of non-collinear spin textures.

Findings

Localized solitons observed in spin dynamics

Chaotic turbulent regime identified

Homogeneous spin switching at high currents

Abstract

In this article I report about a numerical investigation of nonlinear spin dynamics in a magnetic thin-film, made of Yttrium-Iron-Garnet (YIG). This film is exposed to a small in-plane oriented magnetic field, and strong spin currents. The rich variety of findings encompass dynamic regimes hosting localized, non-propagating solitons, a turbulent chaotic regime, which condenses into a quasi-static phase featuring a non-collinear spin texture. Eventually, at largest spin current, a homogeneously switched state is established.