Abstract
The present work has the main objective to study the influence of the proximity effect on the superconducting properties of materials with pinning center dimensions comparable to the coherence length. Artificial Pinning Centers (APC) of Cu(Sn) were introduced into the Nb 3Sn superconducting phase using successive bundlings followed by swaging and wire drawing. Three superconductor wires were produced using the internal tin method. After fabrication, the samples were heat treated to optimize the superconducting phase formation. Microstructural and superconducting characterization of the samples were realized. The results showed the influence of the proximity effect on T c, J c and B c2.
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