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    Propagation of Spin Waves in Intersecting Yttrium Iron Garnet Nanowaveguides

    D. Raskhodchikov1,†, J. Bensmann1,†, K.O. Nikolaev2,†, E. Lomonte1, L. Jin1, P. Steeger1, J.A. Preuß1, R. Schmidt1, R. Schneider1 et al.

    J. Kern1, S. Michaelis de Vasconcellos1, R. Bratschitsch1, S.O. Demokritov2, W.H.P. Pernice1,3, and V.E. Demidov2,*

    • 1Institute of Physics, Center for Nanotechnology and Center for Soft Nanoscience, University of Muenster, 48149 Muenster, Germany
    • 2Institute of Applied Physics, University of Muenster, 48149 Muenster, Germany
    • 3Kirchhoff-Institute for Physics, Heidelberg University, 69120 Heidelberg, Germany

    • *demidov@uni-muenster.de
    • †These authors contributed equally to this work.
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    Phys. Rev. Applied 18, 054081 – Published 28 November, 2022

    DOI: https://doi.org/10.1103/PhysRevApplied.18.054081

    Abstract

    We study experimentally the propagation of spin waves in waveguide structures consisting of two submicrometer-width yttrium iron garnet waveguides intersecting at a right angle. We show that, despite the significant spatial variations of the internal static magnet field and the in-plane anisotropy of the dispersion characteristics, the incident spin wave can efficiently pass through the microscopic cross-shaped structure and be transmitted into all its arms. This process depends strongly on the frequency of the wave and the orientation of the static magnetic field. By varying these parameters, one can achieve a controllable uniform or preferential transmission of the wave into different arms of the cross. Our results create the basis for the implementation of nanoscale magnonic networks to be used for the realization of complex non-Boolean data-processing schemes, including neuromorphic computing.

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    Phys. Rev. Applied 18, 054081– Published 28 November, 2022
    • Received 26 July 2022
    • Accepted 28 September 2022
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