Abstract
Modulation-free BiPbSrL (L=La, Pr, Nd) and , which are isotypic with the n=1 and 2 members of the family, have been prepared and characterized. These parent compounds are nonsuperconducting, but when doped with holes by substitution chemistry give modulation-free superconducting cuprates of the general formulas and , exhibiting maximum ’s of 24 and 85 K, respectively. Significantly, the hole concentration at the maximum is 0.12 in the cuprate family with a single Cu-O layer and 0.22 in that with two Cu-O layers.
- Received 26 November 1990
DOI:https://doi.org/10.1103/PhysRevB.43.8686
©1991 American Physical Society