SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 26: Poster Session II: Nanostructures at surfaces II
O 26.6: Poster
Montag, 1. März 2021, 13:30–15:30, P
Tailoring vortex core polarity and vortex chirality by in-plane and out-of-plane magnetic fields — •Andrea Ehrmann1 and Tomasz Blachowicz2 — 1Bielefeld University of Applied Sciences, Faculty of Engineering and Mathematics, Bielefeld, Germany — 2Silesian University of Technology, Institute of Physics - Centre for Science and Education, Gliwice, Poland
Vortex states in magnetic nanodots can be used to store data, defined by the core polarity and/or the vortex chirality. Preparing nanodots with dimensions leading to magnetization reversal by vortex states is technologically not problematic if material and dimensions are chosen carefully [1,2]. Defining core polarity and vortex chirality reliably, however, needs more sophisticated approaches [3]. Here we give an overview of the influence of different out-of-plane and in-plane bias fields on these values, showing that in clusters of circular nanodots, out-of-plane fields can be applied to define and to switch the vortex core polarity without influencing the vortex chirality simultaneously. This enables defining both properties independently and thus preparing quaternary vortex-based memory devices.
[1] A. Ehrmann, T. Blachowicz, J. Magn. Magn Mater. 475, 727-733 (2019)
[2] A. Ehrmann, T. Blachowicz, Hyperfine Interactions 239, 8 (2018)
[3] A. Ehrmann, T. Blachowicz, Proc. of 2018 IEEE 8th International Conference on "Nanomaterials: Applications & Properties" 1, 01NMM08 (2020)