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TT: Fachverband Tiefe Temperaturen

TT 6: Surface magnetism and magnetic coupling phenomena (joint session MA/O/TT)

TT 6.11: 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-Vrejoiu¹ — ¹University 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)