Ba-Cu-O-Y, Conductor, Karpinski, Orthorhombic

• Ba-Ca-Cu-O-Y
• Ba-Cu-O-Sr-Y
• superconductivity
• structural properties
• superconducting transition temperature
• electronic and electrical properties
• values of superconducting transition temperature
• alkaline
• disordered
• chalcogen
• conductor
• high-tc superconductor