BULK SUPERCONDUCTIVITY WITH TC(ZERO) UP TO 95-K IN A TL0.5PB0.5CA0.9CE0.1SR2CU2 OXIDE WITH AN Y1BA2CU3OY-LIKE STRUCTURE
Journal
Applied Physics Letters
Journal Volume
54
Journal Issue
24
Pages
2464-2466
Date Issued
1989
Author(s)
Abstract
Bulk superconductivity with Tc (zero) up to 95 K in a Tl0.5Pb0.5Ca0.9Ce0.1Sr2Cu2 oxide with an Y1Ba2Cu3Oy -like structure was observed. Single-phase samples, tetragonal in structure with a=0.380±0.001, c=1.195±0.001 nm, and of P4/mmm space group, were prepared. The results represent the first case where Ce substitution significantly raised the Tc of a known compound. The samples were remarkably homogeneous both in composition and structure. The compounds were highly reproducible and stable. The preparative conditions were found to be much less stringent than those of other copper-based high Tc superconductors.
Type
journal article