In an amorphous Ce-42 at %Ru alloy produced by sputtering, the electronic specific heat coefficient rapidly increases with decreasing temperature, T, below 5 K. The magnetic susceptibility obeys the Curie-Weiss law above 100 K; it is enhanced below 100 K and saturated below 6 K. The electrical resistivity, p, is large due to disorder scattering. With decreasing T, p increases for T>40K, showing -log T dependence (the incoherent Kondo effect) and decreases for r<40K (the coherent Kondo effect). The 4f electrons strongly correlate with the conduction electrons to form the singlet Fermi Uquid state even in the random alloy.
ASJC Scopus subject areas
- Physics and Astronomy(all)