SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 5: Posters Magnetism II

MA 5.10: Poster

Dienstag, 28. September 2021, 10:00–13:00, P

First-principles study of DMI mechanisms and exchange frustration in Rh/Co/Fe/Ir multilayers — •Felix Nickel, Sebastian Meyer, and Stefan Heinze — Institute of Theoretical Physics and Astrophysics, University of Kiel

Magnetic skyrmions are promising for the usage in data storage and logic devices. Materials, which can host small diameter skyrmions in zero magnetic field at room temperature, are suitable for such applications. Recently, it has been shown that ultrathin Rh/Co films on Ir(111) exhibit skyrmions with diameters below 10   nm at zero magnetic field [1]. On the other hand, room temperature skyrmions with diameters of 30   nm - 90   nm have been found in magnetic multilayers [2].The Dzyaloshinskii-Moriya Interaction (DMI), exchange frustration and magnetocrystalline anisotropy are the main characteristics that make materials capable of hosting such complex spin structures. We performed density functional theory calculations for different transition-metal multilayer systems consisting of Co, Fe, Ir and Rh and determined those magnetic interactions to investigate if properties of ultra thin film systems, like in Ref. [1], can be transferred to multilayer systems. We present how the magnetic interactions depend on the structural properties of the multilayer systems. Further we predict multilayers which are very promising for the stabilisation of magnetic skyrmions.
[1] Meyer et al., Nat. Commun. 10, 3823 (2019)
[2] Moreau-Luchaire et al., Nat. Nanotechnol. 11, 444 (2016)