Nonlinear emission of spin-wave caustics from an edge mode of a micro-structured Co2Mn0.6Fe0.4Si waveguide

T. Sebastian; P. Pirro; T. Kubota; T. Brächer; A. A. Serga; H. Naganuma; M. Oogane; Y. Ando; B. Hillebrands

doi:10.1103/PhysRevLett.110.067201

Nonlinear emission of spin-wave caustics from an edge mode of a micro-structured Co2Mn0.6Fe0.4Si waveguide

Mesoscale and Nanoscale Physics 2013-02-19 v2 Optics

Authors: T. Sebastian , P. Pirro , T. Kubota , T. Brächer , A. A. Serga , H. Naganuma , M. Oogane , Y. Ando , B. Hillebrands

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Abstract

Magnetic Heusler materials with very low Gilbert damping are expected to show novel magnonic transport phenomena. We report nonlinear generation of higher harmonics leading to the emission of caustic spin-wave beams in a low-damping, micro-structured Co2Mn0.6Fe0.4Si Heusler waveguide. The source for the higher harmonic generation is a localized edge mode formed by the strongly inhomogeneous field distribution at the edges of the spin-wave waveguide. The radiation characteristics of the propagating caustic waves observed at twice and three times the excitation frequency are described by an analytical calculation based on the anisotropic dispersion of spin waves in a magnetic thin film.

Keywords

spin-wave caustics nonlinear emission edge mode Heusler waveguide Co2Mn0.6Fe0.4Si Gilbert damping

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@article{arxiv.1209.3669,
  title  = {Nonlinear emission of spin-wave caustics from an edge mode of a micro-structured Co2Mn0.6Fe0.4Si waveguide},
  author = {T. Sebastian and P. Pirro and T. Kubota and T. Brächer and A. A. Serga and H. Naganuma and M. Oogane and Y. Ando and B. Hillebrands},
  journal= {arXiv preprint arXiv:1209.3669},
  year   = {2013}
}

Nonlinear emission of spin-wave caustics from an edge mode of a micro-structured Co2Mn0.6Fe0.4Si waveguide

Abstract

Keywords

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