Spin-Hall Nano-oscillator: a micromagnetic study

TL;DR

This paper provides a micromagnetic analysis of spin-Hall nanoscillators, revealing localized and propagating modes, and suggests their potential use as nanoscale spin-wave emitters for magnonic information processing.

Contribution

It offers a detailed micromagnetic model that reproduces experimental data and predicts new dynamical modes in spin-Hall nanoscillators.

Findings

Localized mode observed for in-plane bias fields

Asymmetric propagating mode predicted for large out-of-plane bias fields

Potential application as spin-wave emitters in magnonics

Abstract

This letter studies the dynamical behavior of spin-Hall nanoscillators from a micromagnetic point of view. The model parameters have been identified by reproducing recent experimental data quantitatively. Our results indicate that a strongly localized mode is observed for in-plane bias fields such as in the experiments, while predict the excitation of an asymmetric propagating mode for large enough out-of plane bias field similarly to what observed in spin-torque nanocontact oscillators. Our findings show that spin-Hall nanoscillators can find application as spin-wave emitters for magnonic applications where spin waves are used for transmission and processing information on nanoscale.