The Effect of Artificial Pinning Centers on the Superconducting Properties of Nb and Nb3Sn
The superconducting properties of Nb and Nb3Sn with nanometer-size copper artificial pinning centers (APC) are investigated. The non-scaling of the pinning force with temperature for APC enhanced Nb sample is observed. The non-scaling behavior is very similar to that of optimized NbTi conductor. Proximity effect occurs when the size of Nb filaments is smaller than twice the coherence length of Nb. The maximum pinning force of APC enhanced Nb3Sn samples shifts to higher reduced magnetic field.
KeywordsCritical Current Density Coherence Length High Magnetic Field Superconducting Property Proximity Effect
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