Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 48: Magnetization / Demagnetization Dynamics IV
MA 48.8: Vortrag
Donnerstag, 19. März 2015, 16:45–17:00, EB 301
Evolution of Spin Wave Modes in Periodically Perturbed Thin Films — •Manuel Langer1,2, Rodolfo A. Gallardo3, Anja Banholzer1, Tobias Schneider1,2, Kai Wagner1, Pedro Landeros3, Kilian Lenz1, Jürgen Lindner1, and Jürgen Fassbender1,2 — 1Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden — 2Technical University Dresden, 01069 Dresden — 3Technical University Valparaíso, Valparaíso, Chile
The transition from a continuous thin film to a magnonic crystal is studied by ferromagnetic resonance (FMR).
Ion irradiation as well as reactive ion beam etching were used to realize a periodic modulation of the sample surface after patterning by electron beam lithography.
Mode-splitting in the FMR spectra has been investigated dependent on the size of the perturbations and compared to available analytical perturbation theory.
Numerical simulations have been carried out to identify the spin waves corresponding to the mode spectra as well as to understand deviations between measurement and analytical theory for large perturbations.
This work is supported by DFG grant LE2443/5-1.