Dynamic Fingerprints of Synthetic Antiferromagnet Nanostructures with Interfacial Dzyaloshinskii-Moriya Interaction

TL;DR

This paper uses micromagnetic simulations to explore the dynamic properties and phase diagrams of synthetic antiferromagnet nanostructures with interfacial Dzyaloshinskii-Moriya interaction, focusing on skyrmions and their resonant excitations.

Contribution

It provides a comprehensive analysis of static and dynamic magnetic states, including skyrmions, skyrmioniums, and their internal modes, highlighting potential for magnetic sensing applications.

Findings

Rich phase diagrams with various magnetic configurations

Identification of resonant excitations of skyrmions and skyrmioniums

Internal modes of SAF skyrmion clusters relevant for sensing

Abstract

Synthetic antiferromagnet (SAF) nanostructures with interfacial Dzyaloshinskii-Moriya interaction can host topologically distinct spin textures such as skyrmions and thus are regarded as promising candidates for both spintronics and magnonics applications. Here, we present comprehensive micromagnetic simulations of such material systems and discuss the rich phase diagrams that contain various types of magnetic configurations. Aside from the static properties, we further discuss the resonant excitations of the calculated magnetic states which include individual skyrmions and skyrmioniums. Finally, the internal modes of SAF skyrmion clusters are studied and discussed in the context of magnetic sensing applications based on the dynamic fingerprint in broadband ferromagnetic resonance measurements.