@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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    <dc:contributor>Chou, Kang Wei</dc:contributor>
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    <dc:contributor>Schütz, Gisela</dc:contributor>
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    <dc:creator>Tyliszczak, Tolek</dc:creator>
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    <dcterms:bibliographicCitation>First publ. in: Applied Physics Letters 96 (2010), 152506</dcterms:bibliographicCitation>
    <dc:contributor>Bisig, André</dc:contributor>
    <dc:contributor>Kammerer, Matthias</dc:contributor>
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    <dcterms:title>Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well</dcterms:title>
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    <dc:creator>Chou, Kang Wei</dc:creator>
    <dcterms:abstract xml:lang="eng">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.</dcterms:abstract>
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