Nanoscale X-ray imaging of spin dynamics in yttrium iron garnet
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 05, 2019
- Source ID
- 10.1063/1.5121013
Entities
People
- Andrei Slavin
- Carsten Dubs
- Dmytro A. Bozhko
- E. Josten
- G. Dieterle
- G. Schütz
- Hermann Stoll
- Jennifer M. Bailey
- Joachim Gräfe
- Joerg Raabe
- Johannes Förster
- Mitchell Weigand
- N. Trager
- Sebastian Wintz
- Simone Finizio
Organizations
- Defense Advanced Research Projects Agency
- Ernst Ruska-Centre
- German Research Foundation
- Helmholtz-Zentrum Dresden-Rossendorf
- Horizon 2020
- Johannes Gutenberg University Mainz
- National Science Foundation
- Oakland University
- Paul Scherrer Institute
- Swiss Federal Institute of Technology in Lausanne
- University of Colorado, at Colorado Springs
- University of Glasgow
- University of Kaiserslautern