Issue |
EPL
Volume 98, Number 1, April 2012
|
|
---|---|---|
Article Number | 16004 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
DOI | https://doi.org/10.1209/0295-5075/98/16004 | |
Published online | 04 April 2012 |
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
Received:
14
December
2011
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
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