The magnetic scattering of Fe atoms in Au is measured as a function of temperature in the range between 0.08 and 4 K by means of weak localization. We find a strong temperature dependence with maximum scattering at the characteristic temperature $T_{\mathrm{K}}\approx 1$ K of this well-known Kondo system. This is a new and direct experimental approach to observation of the theoretically predicted Kondo maximum and is analogous to pair-breaking experiments in superconductivity.

• Received 27 October 1986

DOI:https://doi.org/10.1103/PhysRevLett.58.1964