MAGNETORESISTANCE OF SMALL KONDO SYSTEMS

Results for the low-temperature magnetoresistance of thin Au films con taining similar to 30 ppm Fe are reported. As expected, we observe con tributions from both the classical magnetoresistance and the local mag netic moments (i.e., the Fe). The local-moment magnetoresistance is a strong function of film thickness, and is suppressed as the thickness is reduced. This finding is compared with previous results for the Kon do effect in small systems, and with recent theoretical predictions.