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MA: Fachverband Magnetismus
MA 3: Magnonics I
MA 3.12: Vortrag
Montag, 17. März 2025, 12:30–12:45, H18
Non-reciprocal phonon-magnon interaction in yttrium-iron-garnet/zinc oxide heterostructures — •Yannik Kunz1, Julian Schüler1, Kevin Künstle1, Finlay Ryburn2, Yangzhan Zhang2, Katharina Lasinger1,2, Philipp Pirro1, John Gregg2, and Mathias Weiler1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, RPTU in Kaiserslautern, Germany — 2University of Oxford, United Kingdom
Magnon-based devices provide a promising approach for energy-efficient computation due to low intrinsic losses in materials such as yttrium-iron-garnet (YIG). Here we show that surface acoustic waves (SAWs) can be used for the excitation of spin waves in hybrid ferrimagnetic/piezoelectric devices. The SAW thereby couples to magnons under conservation of energy and momentum [1,2].
We studied the excitation and propagation behavior of surface acoustic waves in GGG/YIG/ZnO-heterostructures [3] by electrical and micro-focused optical techniques. The phonon-magnon coupling in YIG is investigated by performing SAW transmission measurement as a function of the magnetic field and orientation. The observed magnetoelastic coupling of phonons and magnons is non-reciprocal and highly dependent on the angle between the propagation direction of the SAW and the applied magnetic field.
[1] Küß et al., Frontiers in Physics 10, 981257 (2022)
[2] Kunz et al., Appl. Phys. Lett. 124 152403 (2024)
[3] Ryburn et al., arXiv 2403.030006 (2024)
Keywords: Phonon-Magnon-Interactions; Nonreciprocal; Magnonics; Magnetoelastic