Ba-Cu-O-Y, Diamagnetic, Karpinski

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