Spin Pinning and Spin-Wave Dispersion in Nanoscopic Ferromagnetic Waveguides.

  title={Spin Pinning and Spin-Wave Dispersion in Nanoscopic Ferromagnetic Waveguides.},
  author={Q. Wang and Bj{\"o}rn Heinz and Roman V. Verba and M. Kewenig and Philipp Pirro and M. Schneider and Thomas Meyer and Bert L{\"a}gel and Carsten Dubs and Thomas Br{\"a}cher and Andrii V. Chumak},
  journal={Physical review letters},
  volume={122 24},
Spin waves are investigated in yttrium iron garnet waveguides with a thickness of 39 nm and widths ranging down to 50 nm, i.e., with an aspect ratio thickness over width approaching unity, using Brillouin light scattering spectroscopy. The experimental results are verified by a semianalytical theory and micromagnetic simulations. A critical width is found, below which the exchange interaction suppresses the dipolar pinning phenomenon. This changes the quantization criterion for the spin-wave… 

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