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MA: Fachverband Magnetismus

MA 11: Posters Magnetism III

MA 11.16: Poster

Wednesday, September 29, 2021, 13:30–16:30, P

Spin-wave frequency combs — •Tobias Hula^1,2, Katrin Schultheiss¹, Francisco Goncalves¹, Lukas Körber^1,3, Mauricio Bejarano^1,3, Matthew Copus⁴, Luis Flacke^5,6, Lukas Liensberger^5,6, Aleksandr Buzdakov¹, Attila Kakay¹, Mathias Weiler^5,6,7, Robert Camley⁵, Jürgen Fassbender^1,3, 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.