Flux Pinning with Addition of Gold Nanoparticles in CuTl-1223 Superconductor

We investigated the effects of gold (Au) nanoparticles on flux pinning in Cu0.5Tl0.5Ba2Ca2Cu3O10-delta (CuTl-1223) superconductor by infield temperature-dependent dc-resistivity measurements. The values of (K) remained almost unaffected by applying external magnetic field on (Au) (x) /CuTl-1223; (x = 0 similar to 1.5 wt.%) composites samples. But a decreasing trend in T (c)(0) and increasing trend in resistive broadening (Delta T) by increasing external applied magnetic field were reduced after addition of Au nanoparticles in CuTl-1223 superconducting matrix. The activation energy (U (o)) was calculated according to thermally activated flux flow (TAFF) model by using the Arrhenius Law. The increase in T (c)(0), U (o), and upper critical field (H (c2)) indicates a strong flux pinning after the inclusion of Au nanoparticles and found optimum for x = 1.0 wt.%.