Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 5: Surface magnetism and magnetic coupling phenomena (joint session MA/O/TT)

MA 5.11: Vortrag

Montag, 1. April 2019, 12:15–12:30, H53

Magnetic coupling of ferromagnetic SrRuO3 epitaxial layers separated by ultrathin spacers with large spin-orbit coupling — •Lena Wysocki1, Michael Ziese2, Lin Yang1, Jörg Schöpf1, Rolf Versteeg1, András Kovács3, Lei Jin3, Felix Gunkel4, Regina Dittmann4, Paul H.M. van Loosdrecht1, and Ionela Lindfors-Vrejoiu11University of Cologne, Institute of Physics II, Germany — 2Felix Bloch Institute for Solid State Physics, University of Leipzig, Germany — 3Forschungszentrum Jülich, PGI-5, Germany — 4Forschungszentrum Jülich, PGI-7, Germany

SrRuO3, a 4d ferromagnet exhibiting several Weyl nodes in proximity of the Fermi level, offers a rich playground to tailor its physical properties in epitaxial heterostructures and superlattices. Interfacing SrRuO3 with large spin-orbit coupling perovskite oxides, as SrIrO3, results in intriguing physical phenomena like pronounced anomalies in the Hall resistivity, attributed either to the existence of Néel type skyrmions or to modifications of the Berry curvature of electronic bands with non-trivial topology. The nature of the coupling between the magnetic layers in such superlattices is an important component influencing the global multilayer properties. We present the investigation of the magnetic coupling between ferromagnetic SrRuO3 layers separated by ultrathin spacers of perovskite oxides exhibiting strong spin-orbit coupling[1]. The type and strength of the magnetic interlayer coupling was determined by major and minor magnetization measurements for various spacer geometries.

[1] L. Wysocki et al., Appl. Phys. Lett. 113, 192402 (2018)

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