Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 59: Posters Magnetism III

MA 59.6: Poster

Friday, March 20, 2020, 09:00–12:00, P2/EG

Observation of compact ferrimagnetic skyrmions in DyCo₃ film — •Kai Chen¹, Dieter Lott², Andre Philippi-Kobs³, Markus Weigand^1,4, Chen Luo¹, and Florin Radu¹ — ¹Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str.15, 12489 Berlin, Germany — ²Institute for Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany — ³Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany — ⁴Max-Planck-Institut für Intelligente Systeme, 70569 Stuttgart, Germany

Owing to the experimental discovery of magnetic skyrmions stabilized by the Dzyaloshinskii-Moriya interaction in chiral magnets and/or dipolar interactions in thin films, there is a recent upsurge of interest in magnetic skyrmions with antiferromagnetic spin ordering which exhibit non-trivial topological spin configurations. Here, we report the observation of compact ferrimagnetic skyrmions in DyCo₃ single layer, combining x-ray magnetic scattering, scanning transmission x-ray microscopy and Hall transport techniques. These skyrmions, with an antiparallel aligned Dy and Co magnetic moments and with a characteristic lateral sizes of about ∼40 nm are formed during the nucleation and the annihilation of the magnetic maze-like domains with an obvious topological Hall effect character. Our findings provide a promising route for fundamental research in the field of antiferromagnetic spintronics towards practical applications.