Critical current density - composition diagram

• Ba-Cu-Fe-Nd-O
• Ba-Cu-Fe-O-Y
• Bi-Ca-Cu-O-Pb-Sm-Sr
• Ba-Cu-Er-Fe-O
• Ba-Cu-Eu-O-Y
• conductor
• transitional
• metal
• chalcogen
• alkaline
• orthorhombic
• tetragonal
• hexagonal
• cubic
• trigonal