Magnetic scattering in AuCo and AgCo with weak localization

Abstract

Magnetic scattering due to Co with Au or Ag as the host has been studied with the method of weak localization. Below 20 K the magnetic scattering rate decreases with decreasing temperature. A weak Kondo maximum is found for Co on the surface of Au with $T_K$≊19 K. The magnetic scattering rate for Co in the bulk of Au shows a square-root law in the temperature dependence and this is interpreted as an interacting Kondo system with a high Kondo temperature. For Co on the surface of Ag, the magnetic scattering rate increases with increasing temperature and then becomes almost constant within the accuracy of the experiment.