Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 48: Magnonics II
MA 48.11: Vortrag
Donnerstag, 12. März 2026, 17:45–18:00, HSZ/0004
Auto-oscillations and directional magnonemission induced by spin current injection into large magnetic volumes — •R. Schlitz1,2, V. E. Demidov3, M. Lammel1, S. O. Demokritov3, and P. Gambardella2 — 1Department of Physics, University of Konstanz, Konstanz, Germany — 2Department of Materials, ETH Zurich, Zurich, Switzerland — 3Institute of Applied Physics, University of Muenster, Muenster, Germany
Magnons are quantized excitations of the magnetization texture in ordered magnets, which can be used to transport spin information. In magnetic insulator/heavy metal bilayers angular momentum conversion from the electrical to the magnonic domain allows to electrically generate and detect magnon spin currents in the magnetic layer [1]. Recent studies showed, that in the nonlinear regime the changes of the nonlocal transport allow to also obtain information on the transported magnon manifold [2,3].
We show that local modifications of the magnon dispersion in the nonlinear regime can sensitively affect nonlocal magnon transport, giving rise to a strong enhancement of the number of specific low energy magnons. Considering the role of nonlinear relaxation processes, the nonlocal transport can be understood in terms of the nonequilibrium modification of the magnon dispersion. Our results showcase that nonlocal transport measurements are a sensitive probe to unravel changes to the magnon manifold [4].
[1] L. J. Cornelssien et al., Nature Physics 11, 1022-1026 (2015)
[2, 3] R. Kohno et al., Physical Review B 108, 14410 and 14411 (2023)
[4] R. Schlitz et al., Nature Communications 16, 8472 (2025)
Keywords: ferromagnetic resonance; nonlinear magnonics; multi-magnon scattering