Preparation and Superconducting Properties of Tetragonal Ba2YCu3O7-y and Ba2EuCu3O7-y with Low Oxygen-Defect Concentration (0.05<y<0.20)

Abstract
Tetragonal phases of Ba2YCu3O7-y and Ba2EuCu3O7-y with low oxygen-defect concentration (0.05<yT c and oxygen-defect concentration is observed.