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VOLUME 82, NUMBER 14 P H Y S I C A L R E V I E W L E T T E R S 5 APRIL 1999 Doniach Phase Diagram, Revisited: From Ferromagnet to Fermi Liquid
 

Summary: VOLUME 82, NUMBER 14 P H Y S I C A L R E V I E W L E T T E R S 5 APRIL 1999
Doniach Phase Diagram, Revisited: From Ferromagnet to Fermi Liquid
in Pressurized CeRu2Ge2
S. Süllow,1,
* M. C. Aronson,1
B. D. Rainford,2
and P. Haen3
1
Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120
2
Department of Physics, Southampton University, SO17 1BJ, United Kingdom
3
Centre de Recherches sur les Trés Basses Température CNRS, Grenoble, France
(Received 2 June 1998)
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 nonordering Fermi liquid (FL). The suppression of
magnetic order at pc 67 kbar is accompanied by non-Fermi liquid (NFL) behavior. By comparing
our results to isoelectronic CeRu2 Ge12xSix 2 we derive a unified hybridization J phase diagram for the
entire material class. The phase diagram is characterized by the FL and Kondo energy scales TFL and
TK , with the NFL behavior appearing at TFL 0 K, while TK remains finite and a smoothly increasing

  

Source: Aronson, Meigan - Department of Physics and Astronomy, SUNY at Stony Brook

 

Collections: Materials Science; Physics