New superconducting cuprate perovskites.
01 January 1987
Ten new superconducting cuprate perovskites with T's above 77K are reported. The highest T sub c for any superconductor, is observed in Ba sub 2 Eu sub 9 Y sub (.1) Cu sub 3 O sub x which has a resistive midpoint of 94.5K with a width of 0. 7K. Meissner 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.