Regensburg 2025 – scientific programme

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MA: Fachverband Magnetismus

MA 20: Magnonics II

MA 20.3: Talk

Wednesday, March 19, 2025, 10:00–10:15, H16

Non-linear processes in YIG based spin-wave transducers — •Matthias Wagner, Felix Kohl, Björn Heinz, and Philipp Pirro — Fachbereich Physik and Landesforschungszentrum OPTIMAS, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany

Spin waves are considered as promising candidates for the realization of future signal processing devices. Due to their fundamental equation of motion, spin-wave dynamics are inherently non-linear. For the practical application of spin-wave based devices, this non-linear nature can either be a perspective or a challenge, depending on the desired use case. Therefore, a systematic study on the impact of non-linear dynamics on a potential spin-wave based device is instructive. For this purpose, spin-wave transducers patterned on yttrium iron garnet (YIG) films are investigated. Using micro-focused and time-resolved Brillouin light scattering spectroscopy, the power-limiting non-linear processes as well as their scattering dynamics are analysed. The characterization is complemented by propagating spin-wave spectroscopy measurements to study the corresponding impact of the non-linear processes on the output of the spin-wave transducers. The results of this work provide an important foundation to develop new concepts of signal processing devices using spin waves. This research is funded by the European Union within HORIZON-CL4-2021-DIGITAL-EMERGING-01 (No. 101070536,MandMEMS).

Keywords: Magnonics; Non-linear spin waves; Magnonics application; Spin-wave transducer