Ba-Cu-O-Y, Superconducting transition temperature, Tetragonal, Y-x polyhedra

• Ba-Cu-Fe-O-Y
• Ba-Co-Cu-O-Y
• Ba-Cu-La-O-Y
• Ba-Ca-Cu-La-O-Y
• values of superconducting transition temperature
• lowest temperature of investigation
• superconductivity phenomena
• composition derivative of superconducting transition temperature
• disordered
• oxide
• chalcogen
• alkaline
• rare earth