Dresden 2020 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 25: Skyrmions I (joint session MA/TT)
TT 25.2: Talk
Tuesday, March 17, 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.