Magnetoresistance studies in the ternary spin glass(AuxCu1−x)0.99Mn0.01

Longitudinal magnetoresistance measurements have been made on ternary spin-glass alloys ${\left({\mathrm{Au}}_x{\mathrm{Cu}}_{1-x}\right)}_{0.99}{\mathrm{Mn}}_{0.01}$ for $0.05<~x<~0.60$ in the temperature range 4.2-40 K in magnetic fields up to 45 kG. The procedure adopted by us to fit the results to theory has yielded values for the $s-d$ exchange interaction constant $\mathrm{}\left|J\right|\mathrm{}$ and the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction strength $V_0$ which are in reasonable agreement with values obtained through other studies such as magnetization measurements. Unlike earlier attempts to fit the magnetoresistance data with theory, we obtain acceptable values of $\frac{\mathrm{}\left|J\right|\mathrm{}}{V}$, the ratio of the exchange coupling to the Coulomb potential. The values of $V_0$ obtained are consistent with an RKKY interaction which has been damped due to a reduction in the electron mean free path.