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Journal Article

Laser-Induced Real-Space Topology Control of Spin Wave Resonances

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Möller,  Marcel
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

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Ropers,  Claus       
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

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Adv Funct Materials - 2024 - Titze
(Publisher version), 5MB

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Citation

Titze, T., Koraltan, S., Schmidt, T., Möller, M., Bruckner, F., Abert, C., et al. (2024). Laser-Induced Real-Space Topology Control of Spin Wave Resonances. Advanced Functional Materials. doi:10.1002/adfm.202313619.


Cite as: https://hdl.handle.net/21.11116/0000-000F-1B0D-6
Abstract
Femtosecond laser excitation of materials exhibiting magnetic spin textures promises advanced magnetic control via the generation of non-equilibrium spin dynamics. Ferrimagnetic [Fe(0.35 nm)/Gd(0.40 nm)]160 multilayers are used to explore this approach, as they host a rich diversity of magnetic textures from stripe domains at low magnetic fields, a dense bubble/skyrmion lattice at intermediate fields, and a single domain state for high magnetic fields. Using femtosecond magneto-optics, distinct coherent spin wave dynamics are observed in this material in response to a weak laser excitation, enabling an unambiguous identification of the different magnetic spin textures. Moreover, employing strong laser excitation, versatile control of the coherent spin dynamics via non-equilibrium transformation of magnetic spin textures becomes possible by both creating and annihilating bubbles/skyrmions. Micromagnetic simulations and Lorentz transmission electron microscopy with in situ optical excitation corroborate these findings.