Amorphous Ferrimagnets: an Ideal Host for Ultra-Small Skyrmions at Room Temperature

TL;DR

This paper demonstrates the creation of ultra-small, room-temperature Neel skyrmions in amorphous ferrimagnet using atomistic simulations, highlighting their potential for spintronic applications due to their robustness and low dissipation.

Contribution

It introduces a novel approach to generate stable, ultra-small skyrmions at room temperature in amorphous ferrimagnetic materials, advancing spintronic device prospects.

Findings

Room-temperature ultra-small skyrmions created in amorphous ferrimagnet.

Skyrmions exhibit fast propagation and low dissipation.

Potential for skyrmions in spin-based memory and logic devices.

Abstract

Recently, magnetic skyrmion has emerged as an active topic of fundamental study and applications in magnetic materials research. Magnetic skyrmions are vortex-like spin excitations with topological protection and therefore are more robust to pinning compared with magnetic domain walls. We employ atomistic simulations to create room-temperature ultra-small Neel skyrmions in amorphous ferrimagnet. The fast propagation and low-dissipation dynamics of ultra-small ferrimagnetic skyrmions make them attractive for utilization as an alternative to domain walls in spin-based memory and logic devices.