Deterministic Generation and Guided Motion of Magnetic Skyrmions by Focused He⁺-Ion Irradiation.

ABSTRACT: Magnetic skyrmions are quasiparticles with nontrivial topology, envisioned to play a key role in next-generation data technology while simultaneously attracting fundamental research interest due to their emerging topological charge. In chiral magnetic multilayers, current-generated spin-orbit torques or ultrafast laser excitation can be used to nucleate isolated skyrmions on a picosecond time scale. Both methods, however, produce randomly arranged skyrmions, which inherently limits the precision on the location at which the skyrmions are nucleated. Here, we show that nanopatterning of the anisotropy landscape with a He⁺-ion beam creates well-defined skyrmion nucleation sites, thereby transforming the skyrmion localization into a deterministic process. This approach allows contro

SUBMITTER: Kern LM 

PROVIDER: S-EPMC9137908 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature