Ba-Cu-Fe-O-Y, Disordered, Transitional, P4/mmm

• Ba-Cu-Fe-O-Sr-Y
• Ba-Co-Cu-Fe-O-Y
• Ba-Ca-Cu-Fe-O-Y
• Ba-Cu-Fe-I-O-Y
• magnetic properties
• structural properties
• superconductivity
• superconducting transition temperature
• Moessbauer spectra
• disordered
• cuprate
• chalcogen
• alkaline
• high-tc superconductor
• tetragonal