We report Small-Angle Neutron Scattering (SANS) 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.
@article{arxiv.cond-mat/0301292,
title = {Distribution of Transport Current in a Type II Superconductor Studied by Small Angle Neutron Scattering},
author = {A. Pautrat and C. Goupil and Ch. Simon and D. Charalambous and E. M. Forgan and G. Lazard and P. Mathieu and A. Brulet},
journal= {arXiv preprint arXiv:cond-mat/0301292},
year = {2009}
}
Comments
5 pages 5 figures. accepted for publication in Phys Rev Lett