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MA: Fachverband Magnetismus
MA 43: Skyrmions III / Non-Skyrmionic Magnetic Textures II
MA 43.1: Vortrag
Freitag, 21. März 2025, 09:30–09:45, H16
All-Optical Control of Bubble and Skyrmion Breathing — •Tim Titze1, Sabri Koraltan2, Timo Schmidt3, Dieter Suess2, Manfred Albrecht3, Stefan Mathias1, and Daniel Steil1 — 1I. Physikalisches Insitut, University of Göttingen — 2Physics of Functional Materials, Faculty of Physics, University of Vienna — 3Institute of Physics, University of Augsburg
Topologically protected magnetic skyrmions promise tremendous potential for innovative applications, such as unconventional computing schemes. Deterministic control of the dynamics of such spin objects is one key ingredient for future data processing devices. Using ultrafast Kerr spectroscopy, we investigate the spin dynamics of ferrimagnetic [Fe(0.35 nm)/Gd(0.40 nm)]160 multilayers hosting a dense bubble/skyrmion (BSK) lattice at ambient temperature [1, 2]. Ultrafast laser excitation of the BSK lattice leads to coherent spin dynamics in the form of BSK breathing [3]. By tuning the time delay between excitations in a dual pulse excitation scheme we demonstrate optical control of the breathing dynamics of the BSK lattice in amplitude and phase [4]. This fast and reversible technique presents a promising pathway towards future BSK-based spintronic and magnonic devices.
[1] S. A. Montoya et al., Phys. Rev. B 95, 2024415 (2017)
[2] M. Heigl et al., Nat. Commun. 12, 261 (2021)
[3] T. Titze et al., Adv. Funct. Mater. 34, 2313619 (2024)
[4] T. Titze et al., Phys. Rev. Lett. 133, 156701 (2024)
Keywords: Magnetic textures; Magnetization dynamics; Magneto-optical Kerr effect; Skyrmions; Spin waves