Ba-Cu-Fe-O-Y, Conductor, Semiconductor, Orthorhombic

• Ba-Cu-Fe-O-Pr-Y
• Ba-Cu-Fe-O-Y-Zn
• Ba-Co-Cu-Fe-O-Y
• superconductivity
• superconducting transition temperature
• magnetic properties
• values of superconducting transition temperature
• Moessbauer spectra
• conductor
• disordered
• alkaline
• chalcogen
• high-tc superconductor