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arXiv · 2005.12663

Nonlocal stimulation of three-magnon splitting in a magnetic vortex

Lukas Körber·Katrin Schultheiss·Tobias Hula·Roman Verba·Jürgen Faßbender·Attila Kákay·Helmut Schultheiss
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Abstract

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.

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Lukas Körber, Katrin Schultheiss, Tobias Hula, Roman Verba, Jürgen Faßbender, Attila Kákay, Helmut Schultheiss. 2020-05-26. Nonlocal stimulation of three-magnon splitting in a magnetic vortex. https://doi.org/10.1103/physrevlett.125.207203

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