Abstract

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 CeRu2-xCox. Tc 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 Tc 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.

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