SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 12: Skyrmions II
MA 12.1: Vortrag
Dienstag, 28. März 2023, 09:30–09:45, HSZ 02
Coexistence of distinct skyrmionic spin textures — •Börge Göbel1, Jagannath Jena2, Stuart Parkin2, and Ingrid Mertig1 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg — 2Max-Planck-Institut für Mikrostrukturphysik, Halle
The field of skyrmionics has attracted great research interest, as skyrmions -- whirl-like nano-objects -- are very stable which makes them potential carriers of information in future data storage devices. However, their integer topological charge causes two shortcomings of skyrmion-based racetrack storages: The skyrmions do not move parallel to a current and multiple skyrmions attract and repell each other.
In this talk, I present several alternative nano-objects that go beyond conventional skyrmions [1]. We discuss via simulations, Lorentz transmission electron microscopy measurements [2,3] and Hall transport measurements [4] that skyrmions, antiskyrmion and topologically trivial bubbles [5] can coexist. They can even appear fractionally near the sample's edges [6]. The interplay of Dzyaloshinskii-Moriya and dipolar interactions leads to interesting coexistence and deformation phenomena that may even be utilized for neuromorphic applications.
[1] BG et al. Physics Reports 895, 1-28 (2021), [2] Jena, BG et al. Nat. Com. 11, 1115 (2020), [3] Jena, BG et al. Science Advances 6, eabc0723 (2020), [4] Sivakumar, BG et al. ACS Nano 14, 13463 (2020), [5] BG et al. PRAppl. 15, 064052 (2021), [6] Jena, BG et al. Nat. Com 13, 2348 (2022) [7] Ribeiro de Assis, Mertig, BG arXiv: 2209.11017