Superconducting Metastable Compounds

Science. 1964 Aug 7;145(3632):581-3. doi: 10.1126/science.145.3632.581.

Abstract

A number of metastable phases, germanides and tellurides of gold and silver, have been prepared, analyzed by x-ray diffraction, and investigated for superconductivity. The new superconductors and their transition temperatures are AgTe(3) (2.6 degrees K), Ag(4)Ge (0.85 degrees K), Au(3)Te(5) (1.62 degrees K), and Au(1-x)Ge(x) (0.99 degrees K-1.63 degrees K) where (0.27 </= x </= 0.60). Au-Ge compositions with other values of x do not superconduct above 0.32 degrees K.