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MA: Fachverband Magnetismus

MA 59: Posters Magnetism III

MA 59.2: Poster

Freitag, 20. März 2020, 09:00–12:00, P2/EG

First-principles study of magnetic interactions 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]. An antiferromagnetic coupling between magnetic layers further leads to the stabilisation and fast movement of complex spin structures [3]. Here, we study if properties, such as strong exchange frustration of ultrathin Co films as in Ref. [1] can be transferred to multilayers and how interlayer interactions can be modified. Different transition-metal multilayers consisting of Co, Fe, Ir and Rh layers have been investigated using density functional theory to examine how intra- and interlayer exchange, Dzyaloshinskii-Moriya interaction, and magnetocrystalline anisotropy can be tuned.
[1] Meyer et al., Nat. Commun. 10, 3823 (2019)
[2] Moreau-Luchaire et al., Nat. Nanotechnol. 11, 444 (2016)
[3] Parkin et al., Nat. Nanotechnol. 10, 221 (2015)