Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 31: Poster II
MA 31.36: Poster
Wednesday, March 19, 2025, 17:00–19:30, P1
Magnetoacoustic coupling in Yttrium Iron Garnet / Aluminium Scandium Nitride heterostructures — •Kevin Künstle1, Kaya Gauch1, Yannik Kunz1, Agne Žukauskaite2,3, Stephan Barth2, and Mathias Weiler1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, 67663 Kaiserslautern, Germany — 2Fraunhofer Institute for Electron Beam and Plasma Technology FEP, 01277 Dresden, Germany — 3Institute of Solid State Electronics, Technische Universität Dresden, 01062 Dresden, Germany
The magnetoelastic coupling between surface acoustic waves (SAWs) and spin waves (SWs) has garnered significant attention in recent years. Magnetoelastic excitation of SWs is particularly appealing in ferrimagnets with low magnetic damping, such as yttrium iron garnet (YIG). To enable the electrical excitation of SAWs, a piezoelectric layer is required. We have demonstrated that ZnO is a suitable choice [1]. In this study, a novel heterostructure comprising a YIG/GGG bilayer covered by a piezoelectric AlScN thin film is investigated to explore this coupling. The interaction of SAW and SW is characterized using micro-focused Brillouin light scattering (BLS) spectroscopy and vector network analyzer (VNA) measurements. Additionally, the observed magnetoelastic coupling is benchmarked against the coupling in the more established ZnO/YIG/GGG heterostructure.
[1] Ryburn et al., arXiv 2403.030006 (2024)
Keywords: Magneto-elastic coupling; YIG; AlScN; Phonon; Magnon