Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Poster 2
MA 35.9: Poster
Donnerstag, 8. September 2022, 16:00–18:00, P4
Magnetooptical Investigation of non-reciprocal Phonon- Magnon interaction — •Yannik Kunz1, Michael Schneider1, Moritz Geilen1, Torben Pfeifer1, Matthias Küß2, Manfred Albrecht2, Philipp Pirro1, and Mathias Weiler1 — 1Fachbereich Physik und OPTIMAS, TU Kaiserslautern — 2Institut für Physik, Universität Augsburg
Surface acoustic waves (SAWs) are employed to achieve miniaturization of telecommunication devices, as they live in the Gigahertz-regime with wavelengths on the micrometre scale. The coupling of SAWs with spin waves (SWs) leads to nonreciprocal SAW-propagation, induced by symmetry breaking coupling mechanisms [1]. We investigated the coupling of SAWs, excited by Interdigital Transducers (IDTs), with SWs in a LiNbO3/Co40Fe40B20(10 nm)/SiN(5 nm)-structure using well-established micro-focused Brillouin Light Scattering Spectroscopy and the novel microfocused frequency-resolved magneto-optical Kerr effect with phase resolution, empowered by vector network analysis [2]. We model the magnetic field and angle-dependent SAW-SW- coupling using an extended theoretical model for continuous, viscoelastic Rayleigh-mode SAWs [3] as well as a theoretical model to describe the magneto-elastic coupling [4]. We acknowledge the funding by DFG via project No. 492421737.
[1] M. Küß et al., Phys. Rev. Lett. 125, 217203 (2020).
[2] L. Liensberger et al. IEEE Magn. Lett. 10, 5503905 (2019).
[3] P.K. Currie et al., Q. Appl. Math. 35, (1977).
[4] M. Küß et al., Phys. Rev. Applied 15, 034060 (2021).