Alkaline, Chalcogen, Ammm

• Ba-Cu-O-Y
• Ba-Cu-O-Pr-Y
• Ba-Cu-Fe-O-Y
• Ba-Cu-La-O-Y
• Ba-Cu-Ni-O-Y
• superconductivity
• superconducting transition temperature
• magnetic properties
• electronic and electrical properties
• values of superconducting transition temperature
• chalcogen
• alkaline
• transitional
• rare earth
• conductor
• orthorhombic
• tetragonal