SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 11: Posters Magnetism III
MA 11.16: Poster
Mittwoch, 29. September 2021, 13:30–16:30, P
Spin-wave frequency combs — •Tobias Hula1,2, Katrin Schultheiss1, Francisco Goncalves1, Lukas Körber1,3, Mauricio Bejarano1,3, Matthew Copus4, Luis Flacke5,6, Lukas Liensberger5,6, Aleksandr Buzdakov1, Attila Kakay1, Mathias Weiler5,6,7, Robert Camley5, Jürgen Fassbender1,3, and Helmut Schultheiss1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2TU Chemnitz, Chemnitz, Germany — 3TU Dresden, Dresden, Germany — 4Center for Magnetism and Magnetic Nanostructures, University of Colorado, USA — 5Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Germany — 6TU München, Munich, Germany — 7TU Kaiserslautern, Kaiserslautern, Germany
We present experimental observations on the generation of a spin wave frequency comb in a low damping Co25Fe75 conduit measured using Brillouin light scattering microscopy. By driving the magnetization to large precession angles, nonlinear interactions such as four magnon scattering can be observed. When applying two RF signals with tunable frequencies and amplitudes to our microstructure, we can actively control the final states populated by these scattering processes. Our results show the generation of a frequency comb, consisting of several spin wave modes with adjustable frequency spacing and amplitude. Our observations are in qualitative agreement with micromagnetic simulations. We acknowledge financial support from the DFG within programs SCHU 2922/1-1, WE5386/4-1 and WE5386/5-1. K. S. acknowledges funding within the Helmholtz Postdoc Programme.