Physics – Condensed Matter – Superconductivity
Scientific paper
2004-11-29
Physics
Condensed Matter
Superconductivity
accepted for publication in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.71.064517
Flux Lines Lattice (FLL) states have been studied using transport measurements and Small Angle Neutron Scattering in low T$_c$ materials. In Pb-In, the bulk dislocations in the FLL do not influence the transport properties. In Fe doped NbSe$_{2}$, transport properties can differ after a Field Cooling (FC) or a Zero Field Cooling (ZFC) procedure, as previously reported. The ZFC FLL is found ordered with narrow Bragg Peaks and is linked to a linear V(I) curve and to a superficial critical current. The FC FLL pattern exhibits two Bragg peaks and the corresponding V(I) curve shows a S-shape. This can be explained by the coexistence of two ordered FLL slightly tilted from the applied field direction by different superficial currents. These currents are wiped out when the transport current is increased.
Bhattacharya Sailajananda
Brulet Annie
Goupil Ch.
Higgins Mark J.
Mathieu Pierre
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