Frequency-based nanoparticle sensing over large field ranges using the ferromagnetic resonances of a magnetic nanodisc.

@article{Albert2016FrequencybasedNS,
  title={Frequency-based nanoparticle sensing over large field ranges using the ferromagnetic resonances of a magnetic nanodisc.},
  author={Maximilian Albert and Marijan Beg and Dmitri Chernyshenko and Marc-Antonio Bisotti and Rebecca Carey and Hans Fangohr and Peter J. Metaxas},
  journal={Nanotechnology},
  year={2016},
  volume={27 45},
  pages={
          455502
        }
}
Using finite element micromagnetic simulations, we study how resonant magnetisation dynamics in thin magnetic discs with perpendicular anisotropy are influenced by magnetostatic coupling to a magnetic nanoparticle. We identify resonant modes within the disc using direct magnetic eigenmode calculations and study how their frequencies and spatial profiles are changed by the nanoparticle's stray magnetic field. We demonstrate that particles can generate shifts in the resonant frequency of the disc… Expand
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