Ba-Cu-Er-O, Pmmm, Rare earth, Transitional

• Ba-Cu-Er-Ni-O
• Ba-Cu-Er-O-Zn
• Ba-Co-Cu-Er-O
• Ba-Cu-Er-Fe-O
• superconductivity
• electronic and electrical properties
• superconducting transition temperature
• structural properties
• values of superconducting transition temperature
• high-tc superconductor
• disordered
• chalcogen
• alkaline
• lanthanoid
• orthorhombic