New disordered superconductors

Abstract We have measured the low temperature resistance of zirconium-based metallic glasses. Superconductivity is found in: Zr 65 Cu 35 , T c = 2.0 K; Zr 70 Ni 30 , T c = 2.9 K; and Zr 70 Co 30 , T c = 3.3 K.