Ferromagnetic resonance modes in a single rectangular Ni80Fe20 microstrip were directly imaged using time-resolved scanning transmission x-ray microscopy combined with a phase-locked ferromagnetic resonance excitation scheme, and the findings were corroborated by micromagnetic simulations. Although under uniform excitation in a single confined microstructure typically standing spin waves are expected, all imaged spin waves showed a nonstationary character both at and off resonance, the latter being additionally detected with microantenna-based ferromagnetic resonance. The effect of the edge quality on the spin waves was observed in micromagnetic simulations.
Phys. Rev. B 105, 094415 – Published 10 March 2022.
Authors: Santa Pile, Sven Stienen, Kilian Lenz, Ryszard Narkowicz, Sebastian Wintz, Johannes Förster, Sina Mayr, Martin Buchner, Markus Weigand, Verena Ney, Jürgen Lindner, and Andreas Ney
Santa Pile 