Observation of the non-Fermi-liquid behavior in the evolution from heavy-fermion to valence-fluctuation behavior in Ce(Pt 1-x Rh x )Si 2 series

J. J. Lu, Min-Kai 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-L III -edge X-ray absorption spectrum (XAS) measurements for a solid solution series Ce(Pt 1-x Rh x )Si 2 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0). The results reveal that CePtSi 2 is an antiferromagnetic heavy-fermion compound with T N ≈ 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 CePt 0.4 Rh 0.6 Si 2 . 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

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Kondo effect
Fermions
X ray absorption
Magnetism
Magnetic susceptibility
Specific heat
Absorption spectra
Solid solutions
Magnetization
critical point
solid solutions
fermions
specific heat
valence
absorption spectra
magnetic permeability
electrical resistivity
Liquids
liquids
x rays

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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title = "Observation of the non-Fermi-liquid behavior in the evolution from heavy-fermion to valence-fluctuation behavior in Ce(Pt 1-x Rh x )Si 2 series",
abstract = "We report the results of electrical resistivity, magnetic susceptibility, heat-capacity, and Ce-L III -edge X-ray absorption spectrum (XAS) measurements for a solid solution series Ce(Pt 1-x Rh x )Si 2 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0). The results reveal that CePtSi 2 is an antiferromagnetic heavy-fermion compound with T N ≈ 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 CePt 0.4 Rh 0.6 Si 2 . These results indicate that at x ≈ 0.6, the system is located in the vicinity of a quantum critical point of the evolution.",
author = "Lu, {J. J.} and Min-Kai Lee and Lu, {Y. M.} and Jang, {L. Y.}",
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journal = "Journal of Magnetism and Magnetic Materials",
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TY - JOUR

T1 - Observation of the non-Fermi-liquid behavior in the evolution from heavy-fermion to valence-fluctuation behavior in Ce(Pt 1-x Rh x )Si 2 series

AU - Lu, J. J.

AU - Lee, Min-Kai

AU - Lu, Y. M.

AU - Jang, L. Y.

PY - 2007/4/1

Y1 - 2007/4/1

N2 - We report the results of electrical resistivity, magnetic susceptibility, heat-capacity, and Ce-L III -edge X-ray absorption spectrum (XAS) measurements for a solid solution series Ce(Pt 1-x Rh x )Si 2 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0). The results reveal that CePtSi 2 is an antiferromagnetic heavy-fermion compound with T N ≈ 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 CePt 0.4 Rh 0.6 Si 2 . These results indicate that at x ≈ 0.6, the system is located in the vicinity of a quantum critical point of the evolution.

AB - We report the results of electrical resistivity, magnetic susceptibility, heat-capacity, and Ce-L III -edge X-ray absorption spectrum (XAS) measurements for a solid solution series Ce(Pt 1-x Rh x )Si 2 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0). The results reveal that CePtSi 2 is an antiferromagnetic heavy-fermion compound with T N ≈ 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 CePt 0.4 Rh 0.6 Si 2 . These results indicate that at x ≈ 0.6, the system is located in the vicinity of a quantum critical point of the evolution.

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