ELECTRICAL-RESISTIVITY STUDIES ON AUFECR

Electrical-resistivity(rho) measurements are reported for a series of Au82(Fe1-xCrx)18 alloys (0 less-than-or-equal-to x less-than-or-equal- to 0.8) in the temperature range 4.2 K-300 K. The system emerges into a cluster glass or spin glass for x >0.1, with the end alloys Au82Fe18 and Au82Cr18 being reentrant and antiferromagnetic, respectively. The alloys with x greater-than-or-equal-to 0.6 show pronounced resistivit y maxima. The ''impurity'' resistivity DELTArho shows a T3/2 dependenc e. The saturation of resistivity for x greater-than-or-equal-to 0.4 is discussed in terms of the mean-free-path damping of the Ruderman-Kitt el-Kasuya-Yosida interaction. However, a quantitative fit to a theory by Larsen does not hold for this system.