Formation of Tl-1212 Phase in CR Substituted (Tl1-xCrx) Sr2CaCu2O7 Superconductor
G. M. Ranjbar and R. Abd-Shulor
DOI : 10.3844/pisp.2012.74.78
Volume 3, Issue 2
Superconducting samples of (Tl1-xCrx) Sr2CaCu2O7 for x = 0.0-0.7 have been prepared by a solid state reaction technique at normal pressure using high purity elements. The powder X-ray diffraction patterns have been studied for samples. All samples showed the Tl-1212 as the major phase and Tl-1201 as the minor phase. The superconducting transition temperature Tc has been determined from the electrical resistivity measurements. The data of Tc, for (Tl1-xCrx) Sr2CaCu2O7 show enhancement in its value from 104 K to112 K as x (Cr-content) increases from 0.7 to 0.1. Our results shows the highest onset temperature for x = 0.2-0.3 and the lowest temperature for x = 0.7.
© 2012 G. M. Ranjbar and R. Abd-Shulor. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.