Skyrmion formation in a bulk chiral magnet at zero magnetic field and above room temperature

This is the authors' abstract. We don't add key points for this paper.

Magnetic skyrmions, vortexlike topological spin textures, have attracted much attention in terms of both fundamental physics and spintronics applications. The authors demonstrated that for a high-temperature chiral magnet Co₉Zn₉Mn₂ with bulk Dzyaloshinskii-Moriya interaction, skyrmions persist over almost the whole temperature region below 400 K as a long-lived metastable state reached by moderately slow field cooling. Once created, metastable skyrmions survive at zero magnetic field and above room temperature. These results considerably promote the emerging science of skyrmion, in particular, the fundamental understanding of the role of ``topology'', and also provide a significant step toward practical applications of skyrmions