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

doi:10.1016/j.ssc.2005.03.065

Evolution from intermediate-valence to antiferromagnetic Kondo-lattice behavior in CeNi(Ge_xSi_1-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(Ge_xSi _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-L_III spectroscopy are presented in order to study the crossover from non-magnetic intermediate-valance regime to antiferromagnetic Kondo-lattice regime in the CeNi(Ge_xSi_1-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 language	English
Pages (from-to)	25-29
Number of pages	5
Journal	Solid State Communications
Volume	135
Issue number	1-2
DOIs	https://doi.org/10.1016/j.ssc.2005.03.065
Publication status	Published - 2005 Jul 1

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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

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.",

author = "Lu, {J. J.} and Lee, {M. K.} and Jang, {L. Y.} and C. Tien",

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T1 - Evolution from intermediate-valence to antiferromagnetic Kondo-lattice behavior in CeNi(GexSi1-x)2

AU - Lu, J. J.

AU - Lee, M. K.

AU - Jang, L. Y.

AU - Tien, C.

PY - 2005/7/1

Y1 - 2005/7/1

N2 - 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.

AB - 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.

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