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MA: Fachverband Magnetismus
MA 20: Poster I
MA 20.10: Poster
Dienstag, 19. März 2024, 16:30–19:00, Poster A
Non-reciprocal phonon-magnon interaction in yttrium-iron-garnet/zinc oxide heterostructures — •Yannik Kunz1, Julian Schüler1, Kevin Künstle1, Finlay Ryburn2, Yangzhan Zhang2, Katharina Lasinger1, John Gregg2, Philipp Pirro1, and Mathias Weiler1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, RPTU in Kaiserslautern — 2University of Oxford
Magnon-based devices provide a promising approach for energy-efficient computation due to low intrinsic losses in materials such as yttrium-iron-garnet (YIG). However, the energy-efficient excitation of magnons in magnetic systems is challenging. A potential solution to this issue entails the exploitation of magnetoacoustic interaction for magnon generation. In this approach, surface acoustic waves (SAWs) are generated using transducers that comprise interdigital electrodes in combination with a piezoelectric thin film. The SAW can couple to magnons under conservation of energy and momentum [1]. We studied the phonon-magnon coupling in heterostructures of YIG covered by piezoelectric Zinc Oxide by performing SAW transmission measurements as a function of magnetic field magnitude 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] M. Küß, M. Albrecht, and M. Weiler, Chiral Magnetoacoustics, Frontiers in Physics 10, 981257 (2022).
Keywords: Phonon-Magnon-Interactions; Nonreciprocal; Magnonics; Magnetoelastic