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research article
Hysteresis and control of ferromagnetic resonances in rings
The spin dynamics in narrow ferromagnetic rings is studied in the frequency range from 45 MHz to 20 GHz at room temperature. Our broadband spectrometer allows us to monitor the ferromagnetic resonance of characteristic spin configurations as a function of an external field μ 0 H . We observe hysteresis and irreversible jumps of the resonance frequencies which we attribute to onion-to-vortex and vortex-to-reversed-onion transitions.
Type
research article
Authors
Giesen, F.
•
Podbielski, J.
•
Korn, T.
•
Steiner, M.
•
Staa, A. van
•
Grundler, D.
Publication date
2005
Published in
Volume
86
Issue
11
Article Number
112510
Peer reviewed
REVIEWED
Written at
OTHER
EPFL units
Available on Infoscience
July 7, 2015
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