Coherent Kondo State in Amorphous Ce-Ru Alloy

Yoshiya Homma, Kenji Sumiyama, Hiroshi Yamauchi, Kenji Suzuki

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13 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1442-1445
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number5
Publication statusPublished - 1993


  • amorphous alloy
  • cerium-ruthenium alloy
  • electrical resistivity
  • heavy fermion
  • Kondo lattice
  • low-temperature specific heat
  • magnetic susceptibility
  • magnetoresistance


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