Evolution from intermediate-valence to antiferromagnetic Kondo-lattice behavior in CeNi(GexSi1-x)2

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

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Abstract

A cerium-based intermetallic compound series CeNi(GexSi 1-x)2 (x=0, 0.2, 0.4, 0.5, 0.6, 0.8, 1.0) were synthesized. Among the compounds, CeNiSi2 is an intermediate-valence compound, while CeNiGe2 is a Kondo-lattice with a two-step antiferromagnetic phase transition. In this work, X-ray powder diffraction, transport, magnetic and thermal measurements, as well as Ce-LIII spectroscopy are presented in order to study the crossover from non-magnetic intermediate-valance regime to antiferromagnetic Kondo-lattice regime in the CeNi(GexSi1-x)2 series. Increasing Ge concentration will depress the hybridization between 4f electrons and conducting electrons and enhance the RKKY interaction, which eventually drive the system to a magnetically ordered state.

Original languageEnglish
Pages (from-to)25-29
Number of pages5
JournalSolid State Communications
Volume135
Issue number1-2
DOIs
Publication statusPublished - 2005 Jul 1

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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