Low-temperature resistance anomalies in concentratedPdCralloys

The resistivity, magnetoresistance, and ac susceptibility of several concentrated $\mathrm{Pd}\mathrm{Cr}$ alloys have been investigated. These measurements concentrate on the liquid-helium temperature range, where the resistivity exhibits an anomalous increase with decreasing temperature, which is essentially unchanged by large applied fields. Various processes are examined as the source of this effect, and it is concluded that these data are well described by a square-root dependence on temperature. Such a form has been suggested recently as a precursor effect to the metal-insulator transition by various scaling theories.