Temperature dependence of the resistivity of CuFe thin films with Fe concentrations above 0.1 at.%

The resistivity of low-temperature condensed CuFe thin films was measured in the range $1.5\lesssim T\lesssim 17$ K. Fe concentrations ranged from ∼0.04 to ∼0.9 at.%. The resistivity exhibited an approximately logarithmic rise down to ∼10 K and a less rapid rise below 10 K. The logarithmic slope per at.% Fe of the resistivity curve decreased with increasing Fe concentration. The change in $\left(\frac{1}{c}\right)\left(\frac{d\rho }{d\ln T}\right)$ is interpreted as resulting from interactions between the Fe atoms.