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Unconventional vortex dynamics in the low-field superconducting phases of UPt3

  • Author(s): Amann, A
  • Visani, P
  • Aupke, K
  • Mota, AC
  • Maple, MB
  • Dalichaouch, Y
  • Armstrong, PE
  • Fisk, Z
  • et al.
Abstract

The flux dynamics at low magnetic fields in UPt shows a clear distinction between the relaxation of bulk vortices and those close to the surface. In addition, in the high-temperature A-phase, vortices trapped in the bulk of the specimen after cycling it in a magnetic field creep out as expected, while bulk vortices in the B-phase remain strongly pinned, indicating that an intrinsic, novel pinning mechanism exists in the low-temperature superconducting phase of UPt . 3 3

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