Robust Formation of Ultrasmall Room-Temperature Neel Skyrmions in Amorphous Ferrimagnets from Atomistic Simulations.

ABSTRACT: Neél skyrmions originate from interfacial Dzyaloshinskii Moriya interaction (DMI). Recent studies have explored using thin-film ferromagnets and ferrimagnets to host Neél skyrmions for spintronic applications. However, it is unclear if ultrasmall (10 nm or less) skyrmions can ever be stabilized at room temperature for practical use in high density parallel racetrack memories. While thicker films can improve stability, DMI decays rapidly away from the interface. As such, spins far away from the interface would experience near-zero DMI, raising question on whether or not unrealistically large DMI is needed to stabilize skyrmions, and whether skyrmions will also collapse away from the interface. To address these questions, we have employed atomistic stochastic Landau-Lifshitz-Gilbert simulati

SUBMITTER: Ma CT 

PROVIDER: S-EPMC6620327 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature