  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.
