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arXiv · 2111.07773

Nonstanding spin waves in a single rectangular permalloy microstrip under uniform magnetic excitation

Santa Pile·Sven Stienen·Kilian Lenz·Ryszard Narkowicz·Sebastian Wintz·Johannes Forster·Sina Mayr·Martin Buchner·Markus Weigand·Verena Ney·Jurgen Lindner·Andreas Ney
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Abstract

Ferromagnetic resonance modes in a single rectangular Ni$_{80}$Fe$_{20}$ 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 nonstanding 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.

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Santa Pile, Sven Stienen, Kilian Lenz, Ryszard Narkowicz, Sebastian Wintz, Johannes Forster, Sina Mayr, Martin Buchner, Markus Weigand, Verena Ney, Jurgen Lindner, Andreas Ney. 2021-11-15. Nonstanding spin waves in a single rectangular permalloy microstrip under uniform magnetic excitation. https://doi.org/10.1103/physrevb.105.094415

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