Alkaline, Conductor, Ba-Cu-Fe-O-Y, Tetragonal

• Ba-Cu-Fe-O-Sr-Y
• Ba-Co-Cu-Fe-O-Y
• Ba-Cu-Fe-O-Pr-Y
• Ba-Ca-Cu-Fe-O-Y
• magnetic properties
• superconductivity
• superconducting transition temperature
• structural properties
• Moessbauer spectra
• conductor
• high-tc superconductor
• alkaline
• chalcogen
• oxide