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Abstract:
We present an investigation of Ce-TM-Al phase diagrams with TM = Ru, Pd,
Pt and Au. Several new compounds have been characterized by measurements
of the electrical resistivity rho(T), the dc susceptibility chi(T) and,
in some cases, the specific heat C(T). We find that in the compounds
with TM=Ru, the hybridization strength between 4f and conduction
electrons is strong, leading in most compounds to an intermediate valent
(IV) state. By contrast, most of the investigated compounds with TM =
Pd, Pt and Au order magnetically indicating a much weaker hybridization
strength. However, some of the Pt and especially Pd compounds are very
near to the crossover from the magnetic to the non-magnetic regime as
deduced from a Kondo-type maximum in the resistivity and a large
electronic specific heat at low temperatures.
