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Spatially resolved dynamic eigenmode spectrum of Co rings

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Spatially_resolved_dynamic_eigenmode_spectrum_of_Co_rings.pdf
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2006

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Neudecker, Ingo
Perzlmaier, Korbinian
Backes, Dirk
Heyderman, Laura J.
Vaz, Carlos A. F.
Bland, J. Anthony C.
Back, Christian H.

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-54776
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https://doi.org/10.1103/PhysRevLett.96.057207
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Physical Review Letters. 2006, 96, 57207. Available under: doi: 10.1103/PhysRevLett.96.057207

Zusammenfassung

The spatially resolved eigenmode spectrum of micrometer-sized Co ring elements has been determined by means of combined vector network analyzer ferromagnetic resonance and time resolved magneto-optic Kerr effect measurements. Up to 5 resonant eigenmodes were observed in the frequency range from 45 MHz to 20 GHz as a function of an external magnetic bias field. A well-defined mode structure was found for the two equilibrium states (vortex and onion) which correspond to distinctive spatial modes. The effect of dynamic inter-ring coupling on the modes in the remanent states was evinced. The experimental results are found to be in good agreement with those of micromagnetic simulations. Our results demonstrate that, in analogy to the well-defined static equilibrium magnetic states of ring elements, the eigenmode spectra of this high symmetry geometry consist of a well-defined and simple mode structure.

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530 Physik

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ISO 690NEUDECKER, Ingo, Mathias KLÄUI, Korbinian PERZLMAIER, Dirk BACKES, Laura J. HEYDERMAN, Carlos A. F. VAZ, J. Anthony C. BLAND, Ulrich RÜDIGER, Christian H. BACK, 2006. Spatially resolved dynamic eigenmode spectrum of Co rings. In: Physical Review Letters. 2006, 96, 57207. Available under: doi: 10.1103/PhysRevLett.96.057207
BibTex
@article{Neudecker2006Spati-4911,
  year={2006},
  doi={10.1103/PhysRevLett.96.057207},
  title={Spatially resolved dynamic eigenmode spectrum of Co rings},
  volume={96},
  journal={Physical Review Letters},
  author={Neudecker, Ingo and Kläui, Mathias and Perzlmaier, Korbinian and Backes, Dirk and Heyderman, Laura J. and Vaz, Carlos A. F. and Bland, J. Anthony C. and Rüdiger, Ulrich and Back, Christian H.},
  note={Article Number: 57207}
}
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    <dcterms:abstract xml:lang="eng">The spatially resolved eigenmode spectrum of micrometer-sized Co ring elements has been determined by means of combined vector network analyzer ferromagnetic resonance and time resolved magneto-optic Kerr effect measurements. Up to 5 resonant eigenmodes were observed in the frequency range from 45 MHz to 20 GHz as a function of an external magnetic bias field. A well-defined mode structure was found for the two equilibrium states (vortex and onion) which correspond to distinctive spatial modes. The effect of dynamic inter-ring coupling on the modes in the remanent states was evinced. The experimental results are found to be in good agreement with those of micromagnetic simulations. Our results demonstrate that, in analogy to the well-defined static equilibrium magnetic states of ring elements, the eigenmode spectra of this high symmetry geometry consist of a well-defined and simple mode structure.</dcterms:abstract>
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