Maggio aprile

• As-Ba-Fe-Rb-Sn
• As-F-Fe-O-Sm
• As-F-Fe-La-O
• Bi-Ca-Cu-O-Sr
• As-F-Fe-Nd-O
• superconductivity
• conductivity or resistivity
• electronic and electrical properties
• critical magnetic field
• values of superconducting transition temperature
• transitional
• quinary
• pnictogen
• metalloid
• diamagnetic
• tetragonal
• cubic