Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well

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2010
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Bisig, André
Rhensius, Jan
Kammerer, Matthias
Curcic, Michael
Stoll, Hermann
Schütz, Gisela
Wayenberge, Bartel van
Chou, Kang Wei
Tyliszczak, Tolek
Heydermann, Laura Jane
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Zusammenfassung

Employing time-resolved x-ray microscopy, we investigate the dynamics of a pinned magnetic vortex domain wall in a magnetic nanowire. The gyrotropic motion of the vortex core is imaged in response to an exciting ac current. The elliptical vortex core trajectory at resonance reveals asymmetries in the local potential well that are correlated with the pinning geometry. Using the analytical model of a two-dimensional harmonic oscillator, we determine the resonance frequency of the vortex core gyration and, from the eccentricity of the vortex core trajectory at resonance, we can deduce the stiffness of the local potential well.

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ISO 690BISIG, André, Jan RHENSIUS, Matthias KAMMERER, Michael CURCIC, Hermann STOLL, Gisela SCHÜTZ, Bartel van WAYENBERGE, Kang Wei CHOU, Tolek TYLISZCZAK, Laura Jane HEYDERMANN, Stephen KRZYK, Arndt von BIEREN, Mathias KLÄUI, 2010. Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well. In: Applied Physics Letters. 2010, 96, 152506. Available under: doi: 10.1063/1.3373590
BibTex
@article{Bisig2010Direc-9516,
  year={2010},
  doi={10.1063/1.3373590},
  title={Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well},
  volume={96},
  journal={Applied Physics Letters},
  author={Bisig, André and Rhensius, Jan and Kammerer, Matthias and Curcic, Michael and Stoll, Hermann and Schütz, Gisela and Wayenberge, Bartel van and Chou, Kang Wei and Tyliszczak, Tolek and Heydermann, Laura Jane and Krzyk, Stephen and Bieren, Arndt von and Kläui, Mathias},
  note={Article Number: 152506}
}
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