SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Poster Magnetism I
MA 23.69: Poster
Dienstag, 28. März 2023, 17:00–19:00, P1
Magnetoacoustic excitation of spinwaves in yttrium iron garnet / zinc oxide heterostructures — •Kevin Künstle1, Finlay Ryburn2, Michael Schneider1, Yannik Kunz1, Vitaliy Vasyuchka1, Carsten Dubs3, John Gregg2, and Mathias Weiler1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, RPTU in Kaiserslautern — 2University of Oxford — 3INNOVENT e.V. Technologieentwicklung, Jena, Germany
Surface Acoustic Waves (SAWs) that operate in the Gigahertz regime with wavelengths on the micrometer scale enable the miniaturization of telecommunication microwave devices. In recent years, the coupling of SAWs with spin waves (SWs) in ferromagnetic metals has proven to be a viable option for the realization of applications like acoustic diodes, as the interaction is intrinsically nonreciprocal [1]. However, the coupling of SAWs with SWs in ferrimagnetic insulators is much less explored. We investigated SAWs excited by interdigital transducers made of Ti/Au, which were deposited on a GGG/YIG structure and covered by a piezoelectric ZnO layer. The ferrimagnetic YIG layer serves as a source for SWs to which the SAWs can couple. We used a vector network analyzer and micro-focused Brillouin light scattering spectroscopy to identify the SAW characteristics in the YIG-based heterostructure. The observed magnetoelastic coupling of SAWs with SWs is highly nonreciprocal.
[1] M. Küß et al., Phys. Rev. Lett. 125, 217203 (2020).