Axial and azimuthal spin-wave eigenmodes in rolled-up permalloy stripes

Axial and azimuthal spin-wave eigenmodes in rolled-up permalloy stripes

We experimentally realized rolled-up permalloy stripes to form three-dimensional ring-like ferromagnetic structures. By means of microwave absorption spectroscopy, we find multiple resonances occurring above a demagnetization field threshold which depends on the ring's axial width. Our experime...

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Veröffentlicht in:Applied physics letters 2012-05, Vol.100 (22), p.222402-222402-4
Hauptverfasser: Balhorn, Felix, Jeni, Simon, Hansen, Wolfgang, Heitmann, Detlef, Mendach, Stefan
Format: Artikel
Sprache:eng
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Zusammenfassung:We experimentally realized rolled-up permalloy stripes to form three-dimensional ring-like ferromagnetic structures. By means of microwave absorption spectroscopy, we find multiple resonances occurring above a demagnetization field threshold which depends on the ring's axial width. Our experimental data can be well modeled by assuming both axial and azimuthal spin-wave confinement.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3700809