Nonlocal stimulation of three-magnon splitting in a magnetic vortex
Nonlocal stimulation of three-magnon splitting in a magnetic vortex
Körber, L.; Schultheiß, K.; Hula, T.; Verba, R.; Faßbender, J.; Kakay, A.; Schultheiß, H.
We present a combined numerical, theoretical and experimental study on stimulated three-magnon splitting in a magnetic disk in the vortex equilibrium state. Our micromagnetic simulations and Brillouin-light-scattering results confirm that three-magnon splitting can be triggered even below threshold by exciting one of the secondary modes by magnons propagating in a waveguide next to the disk. The experiments show that stimulation is possible over an extended range of excitation powers and a wide range of frequencies around the eigenfrequencies of the secondary modes. Rate-equation calculations predict an instantaneous response to stimulation and the possibility to prematurely trigger three-magnon splitting even above threshold in a sustainable manner. These predictions are confirmed experimentally using time-resolved Brillouin-light-scattering measurements and are in a good qualitative agreement with the theoretical results. We believe that the controllable mechanism of stimulated three-magnon splitting could provide a possibility to utilize magnon-based nonlinear networks as hardware for reservoir or neuromorphic computing.
Keywords: spin wave; nonlinear; three-magnon splitting; stimulation; micromagnetic simulation; BLS
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Nonlocal stimulation of three-magnon splitting in a magnetic vortex
ROBIS: 31137 HZDR-primary research data are used by this (Id 31058) publication
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Physical Review Letters 125(2020)20, 207203
DOI: 10.1103/PhysRevLett.125.207203
Cited 23 times in Scopus -
Lecture (Conference)
(Online presentation)
MMM 2020 Virtual Conference, 02.-06.11.2020, online, online
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Permalink: https://www.hzdr.de/publications/Publ-31058
Publ.-Id: 31058