Superconducting behaviors of copper-germanium alloys

Abstract

We have observed superconducting properties in three dimensional CuxGe100-x samples with 38 less than or equal to x less than or equal to 67. Transition temperature T-c is about 0.4 K. Upper critical magnetic field H-c2 has been measured in these samples confirming that they are indeed superconductors. Near the zero field T-co, H-c2 depends linearly on temperature. Our results show robust superconducting properties present in CuGe samples with weakly disorder. (C) 2003 Elsevier Science B.V. All rights reserved.