Observation of the non-Fermi-liquid behavior in the evolution from heavy-fermion to valence-fluctuation behavior in Ce(Pt1-xRhx)Si2 series

J. J. Lu, M. K. Lee, Y. M. Lu, L. Y. Jang

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5 Citations (Scopus)

Abstract

We report the results of electrical resistivity, magnetic susceptibility, heat-capacity, and Ce-LIII-edge X-ray absorption spectrum (XAS) measurements for a solid solution series Ce(Pt1-xRhx)Si2 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0). The results reveal that CePtSi2 is an antiferromagnetic heavy-fermion compound with TN ≈ 1.5 K. As Rh content increases, the Kondo effect gradually dominates over the magnetic ordering and drives the system towards an intermediate-valence (IV) regime with nearly quenched magnetism. Besides, we also observed non-Fermi-liquid behaviors in CePt0.4Rh0.6Si2. These results indicate that at x ≈ 0.6, the system is located in the vicinity of a quantum critical point of the evolution.

Original languageEnglish
Pages (from-to)614-617
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume311
Issue number2
DOIs
Publication statusPublished - 2007 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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