Paper Details

In this paper work has been under taken aiming at investigating influence and Effects of chemical dopingon the surface morphology and superconducting properties of Bi2223 were studied in detail. Thin films of well-knownHTS (Bi2Sr2Ca2Cu3O10 (Bi-2223) and (Bi1.65-xPb0.35 Nbx)Sr2Ca2Cu3Oy(X =0.00, 0.01, 0.02) series were deposited byelectron beam evaporation method. The room temperature resistances of the Bi-2223 films were measured usingmultimeter and it shows higher values of resistances. Surface reconstruction and remarkable decrease in the normalstate resistance were seen after ex-situ annealing. The low temperature resistance measurement for finding the criticaltemperature (Tc) gave no results up to the LN2 temperature. Surface characterization of the films shows good surfacemorphology with uniform Nano pillars formation. A clear grain growth with the annealing is evident. The averageparticle size after annealing in the range ~ 120 -130 nm. Superconducting properties of the samples were investigated. In(Bi1.65-xPb0.35 Nbx)Sr2Ca2Cu3Oy(X =0.00, 0.01, 0.02) series films DC electrical resistivity of all the samples decreased asthe wt% of Nb increased. Both the onset critical temperatures Tc (onset) and zero electrical resistivity criticaltemperatures Tc (R = 0) of the samples were determined from the DC electrical resistivity measurements.

Nisha C. Pandya, Chirag J.Shah, “Experimental Study of superconducting properties of HTS Bi2223superconductors with and without Doping”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 2, Issue 12, pp. 355-358, December 2015.