SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 23: Poster Magnetism I
MA 23.76: Poster
Dienstag, 28. März 2023, 17:00–19:00, P1
Microwave Control of Magnon Transport and Spin Pumping in Nanostructures — •Franz Weidenhiller1,2, Janine Gückelhorn1,2, Manuel Müller1,2, Korbinian Rubenbauer1,2,3, Hans Huebl1,2,3, Matthias Althammer1,2, and Rudolf Gross1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Technical University of Munich, TUM School of Natural Sciences, Physics Department, Garching, Germany — 3Munich Center for Quantum Science and Technology, München, Germany
Magnon transport in magnetically ordered insulators is of great interest for the implementation of magnonic devices. Here we report our results on the diffusive magnon transport in yttrium iron garnet (YIG) and its control by the simultaneous excitation of magnons with electromagnetic microwaves. Using e-beam lithography, we pattern two platinum (Pt) strips on top of the YIG for the injection and detection of magnons. The Pt strips are electrically insulated from an aluminum microwave antenna, which covers both strips and the gap in between. Via the antenna, microwave-driven generation of magnons in the active device area by parallel and perpendicular pumping is possible. Our proposed device geometry allows us to distinguish these two pumping contributions in the acquired signal. We investigate how these microwave injected magnons affect the magnon transport between the two Pt strips. Moreover we study the spin pumping signal at different magnetic fields, microwave frequencies and powers. Finally, we discuss relevant magnon relaxation mechanisms in our experiments.