Physical Properties of (BaSnO _ 3) _ x/Cu _ 0.5 Tl _ 0.5 Ba _ 2 Ca _ 2 Cu _ 3 O _ 10-δ (BaSnO 3) x/Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10-δ Superconductor Composite

Abstract

The influence of barium tin oxide nanoparticles addition on the structural and superconducting properties of the Cu_{0.5}Tl_{0.5}Ba2Ca2Cu3O_{10{-}δ } phase, (CuTl)-1223, was studied. A different wt% of BaSnO3, ranging from 0.00 to 1.50, were added into (CuTl)-1223 phase, and this composite was synthesized using the solid-state reaction technique. The phase formation and lattice parameters were calculated from X-ray powder diffraction measurements. The grain connectivity and surface morphology were identified using scanning electron microscope. Energy dispersive X-ray spectroscopy gave the real elemental composition of the prepared samples. Superconducting transition temperature ({T_c}) and critical current density ({J_c}) were determined from the electrical resistivity and I-V measurements, respectively. A complete study about the vibration modes of different atoms was carried out using Fourier transform infrared (FTIR) absorption spectroscopy of (BaSnO3)_x/CuTl-1223 composite. The increase in {T_c} and {J_c} up to x=0.25 wt% is an evidence for improving the superconducting properties of (BaSnO3)_x/CuTl-1223 composites by enhancing both the inter-grains coupling and volume fraction of the (CuTl)-1223 phase.