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MA: Fachverband Magnetismus

MA 19: Skyrmions II (joint session MA/TT/KFM)

MA 19.13: Vortrag

Dienstag, 13. März 2018, 13:00–13:15, EB 301

Material systems for skyrmions in Co-based ferro-/antiferromagnetically (FM/AFM) coupled multilayers — •Hongying Jia, Bernd Zimmermann, Gustav Bihlmayer, and Stefan Blügel — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany

Magnetic skyrmions, in particular AFM skyrmions, are considered as ideal candidates for high storage density information carriers due to the suppressed skyrmion Hall effect and a smaller size by canceling the dipolar fields. So far searching for materials that can host AFM skyrmions is still a challenging task. Magnetic multilayers (MMLs) with composite structures provide a great opportunity to design materials that can host spin-spirals, skyrmions or magnetic domains with optimal properties. Here we will present the qualitative trends of magnetic exchange interactions throughout a wide range of {Z|Co|Pt} MMLs (Z=3d: Cu, Zn; 4d: Tc∼Cd; 5d: Au). The AFM coupling in between the Co layers was observed in {Z|Co|Pt} MMLs (Z=Zn, Ru, Rh, Cd). The effects of 3d-4d-5d hybridization between Co and the nonmagnetic metals, in particular the effects around the Fermi level, on the magnetic interactions will be discussed. The correlation between the electric interface dipole moments and the sign and magnitude of the Dzyaloshinskii-Moriya interaction will be also discussed.

We acknowledge financial support from the MAGicSky Horizon 2020 European Research FET Open project (#665095) and computing time at JURECA from Jülich Supercomputing Center and JARA-HPC.