摘要
Breaking the dilemma between small size and room-temperature stability is a necessary prerequisite for skyrmion-based information technology.Here we demonstrate by means of rate theory and an atomistic spin Hamiltonian that the stability of isolated skyrmions in ultrathin ferromagnetic films can be enhanced by the concerted variation of magnetic interactions while keeping the skyrmion size unchanged.We predict film systems where the lifetime of sub-10 nm skyrmions can reach years at ambient conditions.
基金
This work was funded by the Russian Science Foundation(Grant no.17-72-10195)
the Icelandic Research Fund(Grants nos.163048-053,185409-052,and 184949-052)
the University of Iceland Research Fund,the European Union’s Horizon 2020 Research and Innovation Program under Grant agreement no.665095(FET-Open project MAGicSky)
the Alexander von Humboldt Foundation.
