Unconventional vortex dynamics in the low-field superconducting phases of UPt3
Laboratorium für Festkörperphysik - ETH, 8093 Zürich,
2 Department of Physics and IPAP, UCSD - La Jolla, CA 92093-0319, USA
3 Los Alamos National Laboratory - Los Alamos, NM 87545, USA
Accepted: 12 December 1995
The flux dynamics at low magnetic fields in 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 .
PACS: 74.70.Tx – Heavy-fermion superconductors / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics
© EDP Sciences, 1996