Temperature dependent properties of metallic clusters containing magnetic impurities

The properties of magnetic impurities in small metallic clusters axe invest igated in the framework of the Anderson model by using exact diagonalizatio n methods, Parameters representative of the Kondo limit are considered. The spin gap DeltaE = E(S=1, 3/2) - E(S=0, 1/2) shows a remarkable band-fillin g dependence that can be interpreted in terms of the cluster-specific condu ct ion-electron spectrum. Finite-temperature properties such as the magneti c susceptibility and specific heat are calculated exactly in the canonical and grand canonical ensembles. The structural dependence is illustrated.