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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.6: Poster

Donnerstag, 8. September 2022, 16:00–18:00, P4

Microwave Control of Magnon Transport in Nanostructures — •Franz Weidenhiller^1,2, Janine Gückelhorn^1,2, Manuel Müller^1,2, Hans Huebl^1,2,3, Matthias Althammer^1,2, and Rudolf Gross^1,2,3 — ¹Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — ²Physik-Department, Technische Universität München, 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. We here present our results on the diffusive magnon transport signal in yttrium iron garnet (YIG) due to the simultaneous excitation of magnons with electromagnetic microwaves. Using E-beam lithography, we pattern two platinum 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 through ferromagnetic resonance is possible. We investigate how these microwave injected magnons affect the magnon transport between the two Pt strips. We compare these results to spin pumping experiments using the two Pt strips as electrical detectors. Finally, we discuss relevant magnon relaxation mechanisms in our experiments.