Study the partial substitution for Sr at the Ba on the properties of Tl1.6Hg0.4Ba2-ySryCa2Cu3O10δ5 superconductors

Abstract

Abstract In the present study we have reported realization simultaneous effect substitution of strontium at the barium layer of Tl1.6Hg0.4Ba2-ySryCa2Cu3O10+δ superconductor. Samples of bulk polycrystalline have been prepared by the reaction of solid state process. Four probe technique, is used to find the transition temperature Tc. It was found that the critical temperatures at zero resistivity Tc(Offset) are Tc(Offset) were 95, 115 and 125Kand Tc(on) were 45,40 and 45K for Tl1.6Hg0.4Ba2-ySryCa2Cu3O10+δ with y = 0, 0.1 and 0.2 respectively. The X-ray diffraction study showed that all prepared samples have tetragonal structure, with a clear change in the constants of lattice with strontium-substituted samples compared to this without strontium. It has also been found that a change in the concentrations of strontium leads to a change in, c / a. Tl1.6Hg0.4Ba2-ySryCa2Cu3O10+δ phase development was observed. The surface morphology studied for prepared specimens using atomic force microscopy (AFM). It was found that the average grain size and surface change with the change of the rate of dopant.