Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 52: Poster Magnetism III
MA 52.17: Poster
Thursday, March 12, 2026, 15:00–17:00, P4
Surface Acoustic Wave Generation and Detection in AlScN/GGG Heterostructures — •Karl Heimrich1, Seth Kurfman1, Frank Heyroth2, Katrin Lehmann2, Fabian Lofink3, and Georg Schmidt1,2 — 1Martin Luther Universität Halle-Wittenberg Institut für Physik, Halle, Germany — 2Interdisziplinäres Zentrum für Materialwissenschaften, Halle, Germany — 3Frauenhofer ISIT, Itzehoe, Germany
Surface acoustic waves (SAWs) can be excited and detected in piezoelectric materials using interdigitated transducers (IDTs). In magnetostrictive materials, particularly with low-loss magnetic properties (e.g. Yttrium-Iron-Garnet, YIG), the coupling between SAWs and magnons provides unique opportunities for device applications. Different groups have already successfully demonstrated the coupling of ferromagnetic resonance with acoustic surface waves [1, 2, 3, 4]. Even the coupling to the low loss material YIG has been shown[3, 5]. Here we demonstrate the use of an Aluminium-Scandium-Nitride (AlScN)/Gallium-Gadolinium-Garnet (GGG) heterostructure to excite and detect SAWs that propagate in a pure GGG surface, offering the possibility to couple into micropatterned or even suspended YIG structures [6].
[1] Weiler et al., PRL: 106.11 (2011): 117601. [2] Dreher et al., PRB: 86.13 (2012): 134415. [3] Kunz et al., arXiv preprint: 2503.11203 (2025). [4] Rayburn et al., PRA: 23.3 (2025): 034062. [5] Wong et al., APL 349.6246 (2024): 125.5 [6] Heyroth, Schmidt et al., PRA: 12.5 (2019): 054031
Keywords: surface acoustic waves; magnonics; YIG; acoustically driven ferromagnetic resonance; magnon-phonon coupling