Superconductivity and magnetic susceptibility studies of the cubic Laves phase alloys CeRu_{2 - x}Co_x

Measurements of the room temperature lattice parameter, the superconducting transition temperature and the magnetic susceptibility over the temperature range 1.5 to 300 K have been made on the pseudo-binary alloy system CeRu_2-xCo_x. T_c is depressed from the values for the terminal compounds and superconductivity could not be detected above similar 0.33 K for 0.2 < x < 1.7. From the form of the variation of T_c with Co substitution and the susceptibility measurements it is concluded that the destruction of the superconductivity in CeRu₂ is due to localized spin fluctuations associated with the Co. The effects of transition metal and rare earth substitution into CeRu₂ are compared and discussed.