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

Autor(en)

Tim Titze, Sabri Koraltan, Timo Schmidt, Marcel Möller, Florian Bruckner, Claas Abert, Dieter Suess, Claus Ropers, Daniel Steil, Manfred Albrecht, Stefan Mathias

Abstrakt

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.

Organisation(en)

Physik Funktioneller Materialien, Forschungsplattform MMM Mathematics-Magnetism-Materials

Externe Organisation(en)

Georg-August-Universität Göttingen, Universität Augsburg, Max Planck Institut für Multidisziplinäre Naturwissenschaften

Journal

Advanced Functional Materials

Band

34

Anzahl der Seiten

8

ISSN

1616-301X

DOI

https://doi.org/10.48550/arXiv.2309.12956

Publikationsdatum

03-2024

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik, 103017 Magnetismus

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Allgemeine Chemie, Biomaterials, Allgemeine Materialwissenschaften, Condensed Matter Physics, Electrochemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/d18f68d1-7c1a-4e59-b0b7-c0fa647ea87b