Distribution of transport current in a type-II superconductor studied by small-angle neutron scattering.
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.
Pautrat
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Laboratoire CRISMAT, UMR 6508 du CNRS et de l'ISMRA, 14050 CAEN, France.
Goupil
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Simon
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Charalambous
D
D
Forgan
E M
EM
Lazard
G
G
Mathieu
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P
Brûlet
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