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Nonlinear losses in magnon transport due to four-magnon scattering
We report on the impact of nonlinear four-magnon scattering on magnon transport in microstructured waveguides with low magnetic damping. Using microfocused Brillouin light scattering, we analyze magnon propagation lengths in a broad range of excitation powers and observe a decrease of the attenuation length at high powers, which is consistent with the onset of nonlinear four-magnon scattering. Hence, when measuring magnon propagation lengths and deriving damping parameters from those results, one needs to be careful to stay in the linear regime. Otherwise, the intrinsic nonlinearity of magnetization dynamics may lead to a misinterpretation of magnon propagation lengths and, thus, to wrong values of the magnetic damping of the system.
- Data for: Nonlinear losses in magnon transport due to … (Id 31718) HZDR-primary research data are used by this (Id 31050) publication
Applied Physics Letters 117(2020)4, 042404
- Secondary publication expected from 27.07.2021