Dresden 2020 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 59: Posters Magnetism III
MA 59.10: Poster
Freitag, 20. März 2020, 09:00–12:00, P2/EG
Direct Imaging of the Chiral Spin Texture Distortion in Antiferromagnetic/Ferromagnetic Nanodisk Structures — •Sri Sai Phani Kanth Arekapudi1, Benny Böhm1, Lakshmi Ramasubramanian3, Fabian Ganss1, Peter Heinig1, Ciarán Fowley3, Kilian Lenz3, Jürgen Lindner3, Alina M Deac3, Manfred Albrecht2, and Olav Hellwig1,3 — 1Institute of Physics, Technische Universität Chemnitz, 09107 Chemnitz, Germany — 2Institute of Physics, University of Augsburg, Universitätsstraße 1,86159 Augsburg, Germany — 3Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
Chiral magnetic spin textures, such as skyrmions in ferromagnetic (FM)/antiferromagnetic (AFM) systems are actively explored for future data storage and signal processing devices [1]. We use an archetype NiFe disk structure which is known to stabilize a half-skyrmionic texture (magnetic vortex state). Due to the topological nature, the reversal of the magnetic vortex core is mediated by the creation and subsequent annihilation of Bloch point singularities. Using high-resolution magnetic force microscopy, we show that the interfacial interactions between the chiral spin structure of the FM and AFM can cause significant distortion of the magnetic vortex structure. These interfacial interactions are further used to stabilize phase transformations in chiral nanoscopic spin systems. Experimental observations are further supported by topological arguments and micromagnetic modeling. [1] Albisetti. et al. Commun Phys 1, 56 (2018).