Infield response of (Co)(x)/CuTl-1223 nanoparticles-superconductor composites

摘要

Infield superconducting properties of (Cu0.5Tl0.5)Ba2Ca2Cu3O10-delta (CuTl-1223) superconducting phase after addition of cobalt (Co) nanoparticles were reported. Crystal structure of host CuTl-1223 phase was not affected after inclusion of Co nanoparticles. Superconducting resistive transition broadening was observed with applied magnetic field from 0 to 7 T, which was attributed to dissipation mechanism caused by thermally activated flux flow (TAFF) in the presence of small current (10 mu A). Reduction in activation energy U-o(H,T) showed suppression of flux pinning strength with increasing content of Co nanoparticles. (C) 2015 Elsevier Ltd. All rights reserved.