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

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2 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)1473-1477
頁數5
期刊Journal of Superconductivity and Novel Magnetism
23
發行號8
DOIs
出版狀態Published - 2010 十二月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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