Laser‐induced real‐space topology control of spin wave resonances

  • 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 opticalFemtosecond 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.show moreshow less

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Metadaten
Author:Tim Titze, Sabri Koraltan, Timo Schmidt, Marcel Möller, Florian Bruckner, Claas Abert, Dieter Suess, Claus Ropers, Daniel Steil, Manfred AlbrechtORCiDGND, Stefan Mathias
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/112511
ISSN:1616-301XOPAC
ISSN:1616-3028OPAC
Parent Title (English):Advanced Functional Materials
Publisher:Wiley
Type:Article
Language:English
Year of first Publication:2024
Publishing Institution:Universität Augsburg
Release Date:2024/04/11
Tag:Electrochemistry; Condensed Matter Physics; Biomaterials; Electronic, Optical and Magnetic Materials
First Page:2313619
DOI:https://doi.org/10.1002/adfm.202313619
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik IV
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Latest Publications (not yet published in print):Aktuelle Publikationen (noch nicht gedruckt erschienen)
Licence (German):CC-BY 4.0: Creative Commons: Namensnennung (mit Print on Demand)