title: Distribution of transport current in a type-II superconductor studied by small-angle neutron scattering.
abstract: We report small-angle neutron scattering measurements on the vortex lattice in a PbIn polycrystal in the presence of an applied current. Using the rocking curves as a probe of the distribution of current in the sample, we observe that vortex pinning is due to the surface roughness. This leads to a surface current that persists in the flux-flow region. We show the influence of surface treatments on the distribution of this current.
authors.affiliation: Laboratoire CRISMAT, UMR 6508 du CNRS et de l'ISMRA, 14050 CAEN, France.
authors.forename: A
authors.initials: A
authors.lastname: Pautrat
authors.forename: C
authors.initials: C
authors.lastname: Goupil
authors.forename: Ch
authors.initials: Ch
authors.lastname: Simon
authors.forename: D
authors.initials: D
authors.lastname: Charalambous
authors.forename: E M
authors.initials: EM
authors.lastname: Forgan
authors.forename: G
authors.initials: G
authors.lastname: Lazard
authors.forename: P
authors.initials: P
authors.lastname: Mathieu
authors.forename: A
authors.initials: A
authors.lastname: Brûlet