Payne dale

• Ba-Cu-O-Y-Zn
• Ba-Cu-Ni-O-Y
• Ba-Cu-O-Y
• superconductivity
• superconducting transition temperature
• optical properties
• values of superconducting transition temperature
• Raman spectra
• rare earth
• high-tc superconductor
• conductor
• chalcogen
• alkaline
• orthorhombic