Phase diagram of the CeNi1-xCux Kondo system with spin-glass-like behaviorfavored by hybridization

We present the magnetic phase diagram of the Kondo (ferromagnetic and antif erromagnetic) CeNi1-xCux series revealing the existence of a "spin-glass-li ke" state above the Curie temperature T-C. The stability temperature range of this magnetically disordered phase increases when approaching the magnet ic localized-delocalized crossover point (x approximate to 0.1): This pheno menology is first discussed considering a classical model of spin-glass pha se diagram including the effect of Kondo interactions. The similarities to the scenario described by recent theoretical analysis of strongly correlate d electron systems, considering disorder and competing Ruderman-Kittel-Kasu ya-Yosida and Kondo interactions, are also pointed out.