Abstract
Solid solutions of Bi 2 Sr 2 Ca 1−x Pr x Cu 2 O y (0 ≤ x ≤ 0.6) have been synthesized. The crystal structure and superconducting properties of the samples were examined by XRD and dc electrical resistivity measurements. Linear increase in normal state resistivity is observed with increasing Pr-content (x) for 0 ≤ x ≤ 0.55. Decrease in T c is observed with increasing x and metal–insulator transition is observed around x = 0.55. Although increase in normal state resistivity leads to decrease in T c value, we do not find any definite correlation between these parameters. The conduction mechanism in the semi-conducting sample is found to be Variable Range Hopping. From the decrease of c lattice parameter the possibility of existence of Pr ions in +4 state besides +3 state is inferred.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
