Abstract
Ten new superconducting cuprate perovskites with ’s above 77 K are reported. The highest of the new group, and for any superconductor, is observed in which has a resistive midpoint of 94.5 K with a width of 0.7 K. Miessner effect and ac susceptibility measurements indicate bulk superconductivity in these materials. Each of these cuprates has a two-to-one ratio of divalent to trivalent ion on the A site of the perovskite-type structure.
- Received 13 March 1987
DOI:https://doi.org/10.1103/PhysRevLett.58.1888
©1987 American Physical Society