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

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

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...

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Hauptverfasser: Pautrat, A, Goupil, C, Simon, Ch, Charalambous, D, Forgan, E. M, Lazard, G, Mathieu, P, Brulet, A
Format: Artikel
Sprache:eng
Schlagworte:
Physics - Superconductivity
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Zusammenfassung: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.
DOI:10.48550/arxiv.cond-mat/0301292