TITLE

Dipolar induced, spatially localized resonance in magnetic antidot arrays

AUTHOR(S)
Chengtao Yu, P.N.; Pechan, Michael J.; Mankey, Gary J.
PUB. DATE
November 2003
SOURCE
Applied Physics Letters;11/10/2003, Vol. 83 Issue 19, p3948
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Dipole induced, spatially localized ferromagnetic resonances (at 35 GHz) are observed in micron-sized antidot arrays in permalloy films fabricated with photolithography. All square (3 μm×3 μm) and rectangular (3 μm×4, 5, and 7 μm) array samples exhibit double resonances, with each resonance possessing uniaxial in-plane anisotropy. Interestingly, the easy axes of the two resonances are orthogonal in all cases. The magnitude of the induced dipolar anisotropy decreases with increasing rectangular aspect ratio for one of the resonances, but remains essentially constant for the other. Micromagnetic simulations reveal that the two resonance peaks are the consequence of a dipole field distribution producing two areas with distinctly different demagnetizing field patterns. © 2003 American Institute of Physics.
ACCESSION #
11332762

 

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