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Coupled vortex oscillations in spatially separated permalloy squares

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Abstract
We experimentally study the magnetization dynamics of pairs of micron-sized permalloy squares coupled via their stray fields. The trajectories of the vortex cores in the Landau-domain patterns of the squares are mapped in real space using time-resolved scanning transmission x-ray microscopy. After excitation of one of the vortex cores with a short magnetic-field pulse, the system behaves like coupled harmonic oscillators. The coupling strength depends on the separation between the squares and the configuration of the vortex-core polarizations. Considering the excitation via a rotating in-plane magnetic field, it can be understood that only a weak response of the second vortex core is observed for equal core polarizations.
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Chicago
Vogel, Andreas, Thomas Kamionka, Michael Martens, Andre Drews, Kang Wei Chou, Tolek Tyliszczak, Hermann Stoll, Bartel Van Waeyenberge, and Guido Meier. 2011. “Coupled Vortex Oscillations in Spatially Separated Permalloy Squares.” Physical Review Letters 106 (13).
APA
Vogel, A., Kamionka, T., Martens, M., Drews, A., Chou, K. W., Tyliszczak, T., Stoll, H., et al. (2011). Coupled vortex oscillations in spatially separated permalloy squares. PHYSICAL REVIEW LETTERS, 106(13).
Vancouver
1.
Vogel A, Kamionka T, Martens M, Drews A, Chou KW, Tyliszczak T, et al. Coupled vortex oscillations in spatially separated permalloy squares. PHYSICAL REVIEW LETTERS. 2011;106(13).
MLA
Vogel, Andreas et al. “Coupled Vortex Oscillations in Spatially Separated Permalloy Squares.” PHYSICAL REVIEW LETTERS 106.13 (2011): n. pag. Print.
@article{1245272,
  abstract     = {We experimentally study the magnetization dynamics of pairs of micron-sized permalloy squares coupled via their stray fields. The trajectories of the vortex cores in the Landau-domain patterns of the squares are mapped in real space using time-resolved scanning transmission x-ray microscopy. After excitation of one of the vortex cores with a short magnetic-field pulse, the system behaves like coupled harmonic oscillators. The coupling strength depends on the separation between the squares and the configuration of the vortex-core polarizations. Considering the excitation via a rotating in-plane magnetic field, it can be understood that only a weak response of the second vortex core is observed for equal core polarizations.},
  articleno    = {137201},
  author       = {Vogel, Andreas and Kamionka, Thomas and Martens, Michael and Drews, Andre and Chou, Kang Wei and Tyliszczak, Tolek and Stoll, Hermann and Van Waeyenberge, Bartel and Meier, Guido},
  issn         = {0031-9007},
  journal      = {PHYSICAL REVIEW LETTERS},
  keywords     = {DOTS},
  language     = {eng},
  number       = {13},
  pages        = {4},
  title        = {Coupled vortex oscillations in spatially separated permalloy squares},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.106.137201},
  volume       = {106},
  year         = {2011},
}

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