Ba-Cu-O-Y, Critical magnetic field, Tetrahedron 4-vertex

• Ba-Cu-O-Y-Zn
• Ba-Cu-Ni-O-Y
• Ba-Ca-Cu-O-Y
• Ba-Cu-O-Sr-Y
• upper critical magnetic field
• temperature derivative of upper critical magnetic field
• lower critical magnetic field
• values of critical magnetic field
• disordered
• high-tc superconductor
• chalcogen
• alkaline
• non-disordered
• orthorhombic