Ba-Cu-Fe-O-Y, Chalcogen, P4/mmm

• Ba-Cu-Fe-O-Sr-Y
• Ba-Co-Cu-Fe-O-Y
• Ba-Ca-Cu-Fe-O-Y
• Ba-Ca-Cu-Fe-La-O-Y
• magnetic properties
• structural properties
• superconductivity
• superconducting transition temperature
• Moessbauer spectra
• rare earth
• transitional
• chalcogen
• alkaline
• high-tc superconductor
• tetragonal