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{Nanoscale X-ray imaging of spin dynamics in Yttrium iron garnet}

2019

Article

mms


Time-resolved scanning transmission x-ray microscopy has been used for the direct imaging of spin-wave dynamics in a thin film yttrium iron garnet (YIG) with sub-200 nm spatial resolution. Application of this x-ray transmission technique to single-crystalline garnet films was achieved by extracting a lamella (13×5×0.185 μm3) of the liquid phase epitaxy grown YIG thin film out of a gadolinium gallium garnet substrate. Spin waves in the sample were measured along the Damon-Eshbach and backward volume directions of propagation at gigahertz frequencies and with wavelengths in a range between 200 nm and 10 μm. The results were compared to theoretical models. Here, the widely used approximate dispersion equation for dipole-exchange spin waves proved to be insufficient for describing the observed Damon-Eshbach type modes. For achieving an accurate description, we made use of the full analytical theory taking mode-hybridization effects into account.

Author(s): Förster, J. and Wintz, S. and Bailey, J. and Finizio, S. and Josten, E. and Meertens, D. and Dubs, C. and Bozhko, D. A. and Stoll, H. and Dieterle, G. and Traeger, N. and Raabe, J. and Slavin, A. N. and Weigand, M. and Gräfe, J. and Schütz, G.
Journal: Journal of Applied Physics
Volume: 126
Year: 2019

Department(s): Modern Magnetic Systems
Bibtex Type: Article (article)
Paper Type: Journal

DOI: 10.1063/1.5121013
Eprint: 1903.00498
Language: eng
URL: https://aip.scitation.org/doi/full/10.1063/1.5121013

BibTex

@article{escidoc:3031246,
  title = {{Nanoscale X-ray imaging of spin dynamics in Yttrium iron garnet}},
  author = {F\"orster, J. and Wintz, S. and Bailey, J. and Finizio, S. and Josten, E. and Meertens, D. and Dubs, C. and Bozhko, D. A. and Stoll, H. and Dieterle, G. and Traeger, N. and Raabe, J. and Slavin, A. N. and Weigand, M. and Gr\"afe, J. and Sch\"utz, G.},
  journal = {Journal of Applied Physics},
  volume = {126},
  year = {2019},
  eprint = {1903.00498},
  url = {https://aip.scitation.org/doi/full/10.1063/1.5121013}
}