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28 March 2024
 
  » arxiv » 1903.0498

 Article overview


Nanoscale X-Ray Imaging of Spin Dynamics in Yttrium Iron Garnet
J. Förster ; S. Wintz ; J. Bailey ; S. Finizio ; E. Josten ; D. Meertens ; C. Dubs ; D. A. Bozhko ; H. Stoll ; G. Dieterle ; N. Träger ; J. Raabe ; A. N. Slavin ; M. Weigand ; J. Gräfe ; G. Schütz ;
Date 1 Mar 2019
AbstractTime-resolved scanning transmission x-ray microscopy (TR-STXM) has been used for the direct imaging of spin wave dynamics in thin film yttrium iron garnet (YIG) with spatial resolution in the sub 100 nm range. Application of this x-ray transmission technique to single crystalline garnet films was achieved by extracting a lamella (13x5x0.185 $mathrm{mu m^3}$) of 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 100~nm and 10~$mathrm{mu}$m. 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.
Source arXiv, 1903.0498
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