Dynamic response of antidot nanostructures with alternating hole diameters
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore - Singapore 117576
Accepted: 27 February 2012
We have investigated the dynamic response of alternating-diameter Ni80Fe20 antidot arrays using broadband ferromagnetic resonance (FMR). We observed a significant modification in both the number of spin wave modes and mode profiles when compared with homogeneous diameter antidot arrays. The FMR response shows a static field amplitude-dependent mode transformation (extinction or emergence) due to a complex non-uniform distribution of the demagnetizing field. Our experimental results have also been modeled using dynamic micromagnetic simulations, and we obtained a good agreement between both results.
PACS: 62.23.St – Complex nanostructures, including patterned or assembled structures / 76.50.+g – Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance
© EPLA, 2012