Strongly localized magnetization modes in permalloy antidot lattices

Strongly localized magnetization modes in permalloy antidot lattices

Antidot lattices (ADLs) patterned into soft magnetic thin films exhibit rich ferromagnetic resonance (FMR) spectra corresponding to many different magnetization modes. One of the predicted modes is highly localized at the edges of the antidots; this mode is difficult to detect experimentally. Here w...

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Veröffentlicht in:Applied Physics Letters 2013-04, Vol.102 (15)
Hauptverfasser: Sklenar, J., Bhat, V. S., DeLong, L. E., Heinonen, O., Ketterson, J. B.
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Bhat, V. S.
DeLong, L. E.
Heinonen, O.
Ketterson, J. B.
description Antidot lattices (ADLs) patterned into soft magnetic thin films exhibit rich ferromagnetic resonance (FMR) spectra corresponding to many different magnetization modes. One of the predicted modes is highly localized at the edges of the antidots; this mode is difficult to detect experimentally. Here we present FMR data for a permalloy thin film patterned into a square array of square antidots. Comparison of these data with micromagnetic simulations permits identification of several edge modes. Our simulations also reveal the effect of the antidot shape on the mode dispersion.
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