Abstract
The influence of barium tin oxide nanoparticles addition on the structural and superconducting properties of the
Cu
0.5
Tl
0.5
Ba
2
Ca
2
Cu
3
O
10
-
δ
phase, (CuTl)-1223, was studied. A different wt% of
BaSnO
3
, 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
(
BaSnO
3
)
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
(
BaSnO
3
)
x
/
CuTl-1223
composites by enhancing both the inter-grains coupling and volume fraction of the (CuTl)-1223 phase.