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TT: Fachverband Tiefe Temperaturen

TT 25: Skyrmions I (joint session MA/TT)

TT 25.2: Vortrag

Dienstag, 17. März 2020, 10:00–10:15, POT 6

Skyrmions in SrRuO₃ based heterostructures in tilted magnetic fields? — •Sven Esser¹, Sebastian Esser¹, Anton Jesche¹, Vladimir Roddatis², and Philipp Gegenwart¹ — ¹Experimentalphysik VI, Augsburg University, D-86159 Augsburg, Germany — ²Interface Geochemistry, Helmholtz Centre Potsdam, 14473 Potsdam, Germany

Formation of Néel-type skyrmions at oxide interfaces is supported by Dzyaloshinskii-Moriya (DM) interaction through introducing a breaking of the inversion symmetry. Recently, artificial perovskite bilayers of the ferromagnetic metal SrRuO₃ (SRO) and spin-orbit semimetal SrIrO₃ (SIO) have been proposed to host two-dimensional Néel-type skyrmions [1].

Utilizing metal-organic aerosol deposition we have grown [(SrIrO₃)₂/(SrRuO₃)₅]_k bilayers with k=1,5,10 repetitions on cubic (001)-oriented SrTiO₃ substrate to investigate the interface induced changes of the electronic and magnetic properties. The fully epitaxially strained state of the thin films was verified by X-ray diffraction patterns in combination with reciprocal space mapping and TEM images. A contribution of the topological Hall effect to the Hall resistance can be observed for temperatures between 10K and 80K, which may hint at the formation of skyrmions.

Measurements of the angular-dependent Hall resistivity display additional contributions that are not observed in pure SRO thin films and thus most likely related to the SRO/SIO interface.

[1] J. Matsuno et al., Science Adv. 2 (2016) e1600304.