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28 March 2024 |
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Article overview
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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 | Abstract: | Time-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 | Services: | Forum | Review | PDF | Favorites |
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