Abstract
The cation chemistry and magnetic susceptibility of a suite of samples in the superconducting (Bi,Pb) 2Ca n −1 Sr 2Cu n O x system have been studied at various stages during their evolution from the two-layer to the high T c three-layer polytype. Relationships between phase assemblage and cation chemistry have been identified in both relatively pure and interlayered samples. The Ca/Sr ratio is an important indicator of the relative proportion of the 30 and 37 Å phases. The cation defect structure of these (Bi,Pb) 2Ca n − 1 Sr 2Cu n O x superconductors includes significant vacancies on the Bi and possibly the Sr layers. High cation vacancy concentrations, particularly in the two-layer-dominant material formed at early stages in processing, may play a key role during the subsequent two-layer → three-layer phase transformation.
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.
