Superconducting properties of the Ba1−xYxCuO3−y system

Abstract
Superconductivity of the pseudobinary Ba1−xYxCuO3−y oxide system has been studied. A zero‐resistance state has been achieved at 92.5 K for Ba0.6Y0.4CuO3−y. The critical curent density estimated from the magnetization curve is >102 A/cm2 at 77 K in a magnetic field less than 0.1 T.