Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 45: Magnetic Relaxation and Gilbert Damping
MA 45.1: Talk
Thursday, March 12, 2026, 09:30–09:45, POT/0351
Nonlinear magnon-magnon coupling in a ferrimagetic YIG sphere at cryogenic temperatures — •Johannes Weber1,2, Richard Schlitz3, Sebastian T. B. Goennenwein3, Matthias Althammer1,2, and Hans Huebl1,2,4 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2TUM School of Natural Sciences, Technische Universität München, Garching, Germany — 3Department of Physics, University of Konstanz, Konstanz, Germany — 4Munich Center for Quantum Science and Technology (MCQST), Munich, Germany
Yttrium ion garnet (YIG) is known for its low magnetic damping properties, which are optimized in single crystalline YIG spheres, making it a potent candidate for nonlinear magnonics. The magnetic spectrum shows numerous so called Walker modes. Here, we present two-tone pump and probe microwave spectroscopy measurements of the magnetization dynamics of a 250 µm YIG sphere. The data shows signatures of three-magnon scattering, when the drive exceeds the first order Suhl instability threshold. We quantitatively analyze the underlying non-linearity for different Walker modes. These experiments enable a pathway for probing quantum signatures in magnetic systems.
Keywords: nonlinear; YIG; three-magnon scattering