Disordered, Metal, Superconductor, Karpinski

• Ba-Cu-O-Y
• B-Mg
• B-C-Mg
• As-F-Fe-O-Sm
• Al-B-Mg
• superconductivity
• superconducting transition temperature
• magnetic properties
• optical properties
• values of superconducting transition temperature
• metal
• superconductor
• disordered
• conductor
• diamagnetic
• orthorhombic
• hexagonal
• tetragonal