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Recently, magnetic skyrmion has emerged as an active topic of fundamentalstudy and applications in magnetic materials research. Magnetic skyrmions arevortex-like spin excitations with topological protection and therefore are morerobust to pinning compared with magnetic domain walls. We employ atomisticsimulations to create room-temperature ultra-small Neel skyrmions in amorphousferrimagnet. The fast propagation and low-dissipation dynamics of ultra-smallferrimagnetic skyrmions make them attractive for utilization as an alternativeto domain walls in spin-based memory and logic devices.

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