Anomalous magnetic properties and non-Fermi-liquid behavior in single crystals of the Kondo lattice CeNiGe2-xSix

D. Y. Kim; M. H. Jung; Y. S. Kwon

doi:10.1016/j.physb.2005.01.114

Anomalous magnetic properties and non-Fermi-liquid behavior in single crystals of the Kondo lattice CeNiGe_2-xSi_x

D. Y. Kim, M. H. Jung, Y. S. Kwon

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We report results of a systematic study on the specific heat and electrical resistivity of the heavy-fermion compounds CeNiGe2-xSix(0≤x≤ 1). The compounds of x<1 show the antiferromagnetic order and the ordering temperature shifts to lower temperature with increasing x. Then, the magnetic order is smeared out at x=1. The anomaly observed in the specific heat is well interpreted by the Kondo model for a degenerate impurity spin J=12 in the Coqblin-Schrieffer limit. In addition, there is significant deviation from the Fermi-liquid behavior at the critical concentration x=1.

Original language	English
Pages (from-to)	302-304
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	359-361
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2005.01.114
State	Published - 30 Apr 2005

Bibliographical note

Funding Information:
This work supported by the Korea Science and Engineering Foundation through the Center for Strongly Correlated Materials Research (CSCMR) at Seoul National University and by Grant No. R01-2003-000-10095-0 from the Basic Research Program of the Korea Science & Engineering Foundation.

Keywords

CeNiGeSi
Heavy fermion
Non-Fermi-liquid behavior

Access to Document

10.1016/j.physb.2005.01.114

Cite this

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title = "Anomalous magnetic properties and non-Fermi-liquid behavior in single crystals of the Kondo lattice CeNiGe2-xSix",

abstract = "We report results of a systematic study on the specific heat and electrical resistivity of the heavy-fermion compounds CeNiGe2-xSix(0≤x≤ 1). The compounds of x<1 show the antiferromagnetic order and the ordering temperature shifts to lower temperature with increasing x. Then, the magnetic order is smeared out at x=1. The anomaly observed in the specific heat is well interpreted by the Kondo model for a degenerate impurity spin J=12 in the Coqblin-Schrieffer limit. In addition, there is significant deviation from the Fermi-liquid behavior at the critical concentration x=1.",

keywords = "CeNiGeSi, Heavy fermion, Non-Fermi-liquid behavior",

author = "Kim, {D. Y.} and Jung, {M. H.} and Kwon, {Y. S.}",

note = "Funding Information: This work supported by the Korea Science and Engineering Foundation through the Center for Strongly Correlated Materials Research (CSCMR) at Seoul National University and by Grant No. R01-2003-000-10095-0 from the Basic Research Program of the Korea Science & Engineering Foundation.",

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AU - Kim, D. Y.

AU - Jung, M. H.

AU - Kwon, Y. S.

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N2 - We report results of a systematic study on the specific heat and electrical resistivity of the heavy-fermion compounds CeNiGe2-xSix(0≤x≤ 1). The compounds of x<1 show the antiferromagnetic order and the ordering temperature shifts to lower temperature with increasing x. Then, the magnetic order is smeared out at x=1. The anomaly observed in the specific heat is well interpreted by the Kondo model for a degenerate impurity spin J=12 in the Coqblin-Schrieffer limit. In addition, there is significant deviation from the Fermi-liquid behavior at the critical concentration x=1.

AB - We report results of a systematic study on the specific heat and electrical resistivity of the heavy-fermion compounds CeNiGe2-xSix(0≤x≤ 1). The compounds of x<1 show the antiferromagnetic order and the ordering temperature shifts to lower temperature with increasing x. Then, the magnetic order is smeared out at x=1. The anomaly observed in the specific heat is well interpreted by the Kondo model for a degenerate impurity spin J=12 in the Coqblin-Schrieffer limit. In addition, there is significant deviation from the Fermi-liquid behavior at the critical concentration x=1.

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