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We report that in a $\beta$-Mn-type chiral magnet Co$_9$Zn$_9$Mn$_2$,skyrmions are realized as a metastable state over a wide temperature range,including room temperature, via field-cooling through the thermodynamicequilibrium skyrmion phase that exists below a transition temperature$T_\mathrm{c}$ $\sim$ 400 K. The once-created metastable skyrmions survive atzero magnetic field both at and above room temperature. Such robust skyrmionsin a wide temperature and magnetic field region demonstrate the key role oftopology, and provide a significant step toward technological applications ofskyrmions in bulk chiral magnets.

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