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Distribution of Transport Current in a Type II Superconductor Studied by Small Angle Neutron Scattering

A. Pautrat·C. Goupil·Ch. Simon·D. Charalambous·E. M. Forgan·G. Lazard·P. Mathieu·A. Brulet
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Abstract

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.

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A. Pautrat, C. Goupil, Ch. Simon, D. Charalambous, E. M. Forgan, G. Lazard, P. Mathieu, A. Brulet. 2003-02-20. Distribution of Transport Current in a Type II Superconductor Studied by Small Angle Neutron Scattering. https://doi.org/10.1103/physrevlett.90.087002

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