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

被引：5
|
作者：
Lu, J. J. [1 ]
Lee, M. K.
Lu, Y. M.
Jang, L. Y.
机构：
[1] Kun Shan Univ, Nanotechnol R&D Ctr, Yung Kang 710, Taiwan
[2] Natl Cheng Kung Univ, Dept Phys, Tainan 700, Taiwan
[3] Natl Formosa Univ, Grad Inst Electroopt & Mat Sci, Huwei, Yunlin, Taiwan
[4] Natl Synchrotron Radiat Res Ctr, Hsinchu, Taiwan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 311卷 / 02期
关键词：
Kondo lattice; non-fermi-liquid; quantum critical point; DENSE KONDO; ANTIFERROMAGNETISM; TRANSITION; ELECTRON; REGIME; SYSTEM;
D O I：
10.1016/j.jmmm.2006.08.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the results of electrical resistivity, magnetic susceptibility, heat-capacity, and Ce-L-HI-edge X-ray absorption spectrum (XAS) measurements for a solid solution series Ce(Pt1-xRhx)Si-2 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0). The results reveal that CePtSi2 is an antiferromagnetic heavy-fermion compound with T-N approximate to 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 (CePt0.4RhSi2)-Si-0.6. These results indicate that at x P, 0.6, the system is located in the vicinity of a quantum critical point of the evolution. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：614 / 617
页数：4
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