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TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.61: Poster

Wednesday, March 14, 2018, 15:00–19:00, Poster B

Interface-driven Skyrmions in SrRuO3 based heterostructures — •Sven Esser1, Sebastian Esser1, Anton Jesche1, Vladimir Roddatis2, and Philipp Gegenwart11Experimentalphysik VI, Universität Augsburg, 86159 Augsburg, Germany — 2Institut für Materialphysik, Georg-August-Universität Göttingen, 37077 Göttingen, Germany

Formation of Néel-type skyrmions at oxide interfaces is supported by Dzyaloshinskii-Moriya (DM) interaction through introducing a break of 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].

By using a metal-organic aerosol deposition technique 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. Measurement of the in-plane magnetization indicate a relation to the number of interfaces between SRO and SIO layers. A contribution of the topological Hall effect to the Hall resistance can be observed near 80K, which may be a hint for the formation of skyrmions.
J. Matsuno et al., Science Adv. 2 (2016) e1600304.

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