Ba-Cu-La-O, Quaternary, Transitional

• Ba-Cu-Er-O
• Ba-Cu-Eu-O
• Ba-Cu-Gd-O
• Ba-Cu-Dy-O
• structural properties
• electronic and electrical properties
• superconductivity
• magnetic properties
• superconducting transition temperature
• rare earth
• quaternary
• alkaline
• chalcogen
• transitional
• tetragonal
• orthorhombic
• monoclinic
• trigonal