Nonlinear losses in magnon transport due to four-magnon scattering

Published

May 25, 2020

Author(s)

T. Hula, K. Schultheiss, A. Budzakov, L. Korber, M. Bejarano, L. Flacke, L. Liensberger, M. Weiler, Justin Shaw, Hans Nembach, J. Fassbender, H. Schultheiss

Abstract

We report on the impact of nonlinear four-magnon scattering on magnon transport in microstructured Co₂₅Fe₇₅ waveguides with low magnetic damping. We determine the magnon propagation length with microfocused Brillouin light scattering over a broad range of excitation powers and detect a decrease of the attenuation length at high powers. This is consistent with the onset of nonlinear four-magnon scattering. Hence, it is critical to stay in the linear regime, when deriving damping parameters from the magnon propagation length. Otherwise, the intrinsic nonlinearity of magnetization dynamics may lead to a misinterpretation of magnon propagation lengths and, thus, to incorrect values of the magnetic damping of the system.

Citation

Physics Arxiv

Pub Type

Journals

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Keywords

magnonics, four-magnon scattering, magnetization dynamics, Brillouin light scattering, magnetic damping

Citation

Hula, T. , Schultheiss, K. , Budzakov, A. , Korber, L. , Bejarano, M. , Flacke, L. , Liensberger, L. , Weiler, M. , Shaw, J. , Nembach, H. , Fassbender, J. and Schultheiss, H. (2020), Nonlinear losses in magnon transport due to four-magnon scattering, Physics Arxiv, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=930381 (Accessed August 16, 2022)