Abstract
The effects of Li doping on Bi 2 Sr 2 CaCu 2 O x pellets has been studied by considering Li substitution for Sr and Cu and Li additions to stoichiometric Bi 2 Sr 2 CaCu 2 O x . As the Li substitution reduces the melting temperature by as much as 160°C, melting studies were performed to determine the sintering conditions for melt-quenching. While a variety of stoichiometries all exhibited S N transitions above 80 K, the transition of Bi 2 Sr 2 Ca(Cu 0.55 Li 0.45 ) 2 O x was significantly narrower than other cation combinations. However, Li did not increase T c relative to Bi 2 Sr 2 CaCu 2 O x [1–4]. Microstructural analysis by SEM and SIMS indicated that the Bi, Sr, Ca and Cu are all distributed uniformly throughout the pellet, while the Li distribution is quite inhomogeneous. Furthermore, SIMS depth profiling into the Ag/BSCCOLi interface showed that although the Bi:Sr:Ca:Cu ratio remains relatively constant, the Bi:Li ratio increases by over 100%, indicating that the Li penetrates the Ag interface to a greater extent than the other cations and that Li doping may effect the behaviour at the BSCCO/Ag interface.
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.
