Temperature Dependence of Spin Pinning and Spin-Wave Dispersion in Nanoscopic Ferromagnetic Waveguides


  • B. Heinz Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern, Graduate School Materials Science in Mainz
  • Q. Wang Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern, Nanomagnetism and Magnonics, Faculty of Physics, University of Vienna
  • R. Verba Institute of Magnetism
  • V.I. Vasyuchka Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern
  • M. Kewenig Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern
  • P. Pirro Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern
  • M. Schneider Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern
  • T. Meyer Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern, THATec Innovation GmbH
  • B. Lägel Nano Structuring Center, Technische Universit¨at Kaiserslautern
  • C. Dubs INNOVENT e.V., Technologieentwicklung
  • T. Brächer Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern
  • O.V. Dobrovolskiy Nanomagnetism and Magnonics, Faculty of Physics, University of Vienna
  • A.V. Chumak Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universit¨at Kaiserslautern, Nanomagnetism and Magnonics, Faculty of Physics, University of Vienna




spin waves, yttrium iron garnet, Brillouin light scattering spectroscopy, low temperatures


The field of magnonics attracts significant attention due to the possibility of utilizing information coded into the spin-wave phase or amplitude to perform computation operations on the nanoscale. Recently, spin waves were investigated in Yttrium Iron Garnet (YIG) waveguides with widths down to 50 nm and aspect ratios of thickness to width approaching unity. A critical width was found, below which the exchange interaction suppresses the dipolar pinning phenomenon, and the system becomes unpinned. Here, we continue these investigations and analyze the pinning phenomenon and spin-wave dispersion as functions of temperature, thickness, and material parameters. Higher order modes, the influence of a finite wavevector along the waveguide, and the impact of the pinning phenomenon on the spin-wave lifetime are discussed, as well as the influence of a trapezoidal cross-section and edge roughness of the waveguide. The presented results are of particular interest for potential applications in magnonic devices and the incipient field of quantum magnonics at cryogenic temperatures.


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How to Cite

Heinz, B., Wang, Q., Verba, R., Vasyuchka, V., Kewenig, M., Pirro, P., Schneider, M., Meyer, T., Lägel, B., Dubs, C., Brächer, T., Dobrovolskiy, O., & Chumak, A. (2020). Temperature Dependence of Spin Pinning and Spin-Wave Dispersion in Nanoscopic Ferromagnetic Waveguides. Ukrainian Journal of Physics, 65(12), 1094. https://doi.org/10.15407/ujpe65.12.1094



Physics of magnetic phenomena and physics of ferroics