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MA: Fachverband Magnetismus

MA 43: Skyrmions III / Non-Skyrmionic Magnetic Textures II

MA 43.9: Vortrag

Freitag, 21. März 2025, 11:45–12:00, H16

Tunable magnetic skyrmion bubbles in centrosymmetric magnets — Dola Chakrabartty¹, István Kézsmárki¹, and •Ajaya Kumar Nayak² — ¹Experimentalphysik V, Center for Electronic Correlations and Magnetism, Institute for Physics, Augsburg University, D-86135 Augsburg, Germany — ²School of Physical Sciences, National Institute of Science Education and Research, HBNI, Jatni, 752050, Bhubaneswar, India

Magnetic skyrmions are topologically protected spin textures that can avoid defects and be mobilized by low current densities, making them potential candidates for high-density and low-power consuming logic and memory devices. Skyrmion-like spin textures with different helicities and vorticities have recently been found also in centrosymmetric magnets, stabilized by competing dipolar interaction and out-of-plane magnetic anisotropy. The primary motivation of this study is to explore the extensive tunability of magnetic skyrmion bubbles in centrosymmetric magnets with internal and external parameters. We have demonstrated that in the centrosymmetric system by applying external magnetic field and tuning magnetic anisotropy one can transform skyrmions (topological number -1) to type-II bubble (topological number 0) through Bloch line formation. We found that the skyrmions are stable when there is only out-of-plane uniaxial anisotropy, whereas the introduction of small in-plane anisotropy turns them to type-II bubbles. Presently, we are in the process of exploring the tunability of skyrmions in such systems with other external stimuli, such as uniaxial strain and laser irradiation.

Keywords: Skyrmion; Centrosymmetric magnet; Helicity; Real space topology; Vorticity