Observation of RKKY-Kondo competition and non-fermi-liquid behavior in the intermetallic compound series Ce(Cu 1-x Ni x )Si 2

J. J. Lu, T. S. Mo, K. J. Gan, T. C. Lin, M. K. Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We study Kondo-RKKY competition in the intermetallic compound series Ce(Cu 1-x Ni x )Si 2 (x=0, 0.2, 0.4, 0.6, 0.8, 1.0) by performing X-ray diffraction, electrical resistivity, magnetic susceptibility measurements and Ce-L III-edge X-ray absorption spectra. The results reveal that RKKY interaction dominates and leads to spin-glass behavior at the Cu rich end. For the Ni rich end the Kondo effect prevails and drives the system towards an intermediate-valence regime with nearly quenched magnetism. According to the experimental result, we are able to obtain a phase diagram similar to Theumann's theoretical model. This work also observed non-Fermi-liquid behavior from the ρ(T) and χ(T) measurements at x=0.6, indicating this series to lie in the vicinity of a quantum critical point at this content.

Original languageEnglish
Pages (from-to)1473-1477
Number of pages5
JournalJournal of Superconductivity and Novel Magnetism
Volume23
Issue number8
DOIs
Publication statusPublished - 2010 Dec 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Observation of RKKY-Kondo competition and non-fermi-liquid behavior in the intermetallic compound series Ce(Cu <sub>1-x</sub> Ni <sub>x</sub> )Si <sub>2</sub>'. Together they form a unique fingerprint.

Cite this