Visualizing the strongly reshaped skyrmion Hall effect in multilayer wire devices.

ABSTRACT: Magnetic skyrmions are nanoscale spin textures touted as next-generation computing elements. When subjected to lateral currents, skyrmions move at considerable speeds. Their topological charge results in an additional transverse deflection known as the skyrmion Hall effect (SkHE). While promising, their dynamic phenomenology with current, skyrmion size, geometric effects and disorder remain to be established. Here we report on the ensemble dynamics of individual skyrmions forming dense arrays in Pt/Co/MgO wires by examining over 20,000 instances of motion across currents and fields. The skyrmion speed reaches 24 m/s in the plastic flow regime and is surprisingly robust to positional and size variations. Meanwhile, the SkHE saturates at ∼22^∘, is substantially reshaped by the wire

SUBMITTER: Tan AKC 

PROVIDER: S-EPMC8275747 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature