Normal modes of coupled vortex gyration in two spatially separated magnetic nanodisks

@article{Lee2011NormalMO,
  title={Normal modes of coupled vortex gyration in two spatially separated magnetic nanodisks},
  author={Kisuk Lee and Hyunsung Jung and Dong-Soo Han and Sang-Koog Kim},
  journal={Journal of Applied Physics},
  year={2011},
  volume={110},
  pages={113903}
}
We found from analytical derivations and micromagnetic numerical simulations that there exist two distinct normal modes in apparently complex vortex gyrotropic motions in two dipolar-coupled magnetic nanodisks. The normal modes have characteristic higher and lower single angular eigenfrequencies with their own elliptical orbits elongated along the x (bonding axis) and y axes, respectively. The superposition of the two normal modes results in coupled vortex gyrations, which depend on the… 

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