@article{Heyne2008Relat-9476,
  year={2008},
  doi={10.1103/PhysRevLett.100.066603},
  title={Relationship between Nonadiabaticity and Damping in Permalloy Studied by Current Induced Spin Structure Transformations},
  volume={100},
  journal={Physical Review Letters},
  author={Heyne, Lutz and Kläui, Mathias and Backes, Daniel and Moore, T. A. and Krzyk, Stephen and Rüdiger, Ulrich and Heyderman, Laura J. and Fraile Rodríguez, Arantxa and Nolting, Frithjof and Mentes, Tevfik Onur and Niño, Miguel Ángel and Locatelli, Andrea and Kirsch, Konstantin and Mattheis, Roland},
  note={Article Number: 66603}
}

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    <dcterms:bibliographicCitation>First publ. in: Physical Review Letters 100 (2008), 066603</dcterms:bibliographicCitation>
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    <dcterms:abstract xml:lang="eng">By direct imaging we determine spin structure changes in Permalloy wires and disks due to spin transfer torque as well as the critical current densities for different domain wall types. Periodic domain wall transformations from transverse to vortex walls and vice versa are observed, and the transformation mechanism occurs by vortex core displacement perpendicular to the wire. The results imply that the nonadiabaticity parameter beta does not equal the damping alpha, in agreement with recent theoretical predictions. The vortex core motion perpendicular to the current is further studied in disks revealing that the displacement in opposite directions can be attributed to different polarities of the vortex core.</dcterms:abstract>
    <dc:contributor>Kläui, Mathias</dc:contributor>
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    <dcterms:title>Relationship between Nonadiabaticity and Damping in Permalloy Studied by Current Induced Spin Structure Transformations</dcterms:title>
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