Doniach phase diagram, revisited: From ferromagnet to fermi liquid in pressurized CeRu2Ge2

We present the resistivity and ac susceptibility of CeRu2Ge2 at pressures p up to 130 kbar. Pressure transforms the system from a ferromagnet into a n onordering Fermi liquid (FL). The suppression of magnetic order at p(c) = 6 7 kbar is accompanied by non-Fermi liquid (NFL) behavior. By comparing our results to isoelectronic CeRu2(Ge1-xSix)(2) we derive a unified hybridizati on J phase diagram for the entire material class. The phase diagram is char acterized by the FL and Kondo energy scales T-FL and T-K, with the NFL beha vior appearing at T-FL = 0 K, while T-K remains finite and a smoothly incre asing function of J. [S0031-9007(99)08832-8].