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

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

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

We report the results of electrical resistivity, magnetic susceptibility, heat-capacity, and Ce-LIII-edge X-ray absorption spectrum (XAS) measurements for a solid solution series Ce(Pt1-xRhx)Si2 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0). The results reveal that CePtSi2 is an antiferromagnetic heavy-fermion compound with TN ≈ 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 CePt0.4Rh0.6Si2. These results indicate that at x ≈ 0.6, the system is located in the vicinity of a quantum critical point of the evolution.

原文English
頁(從 - 到)614-617
頁數4
期刊Journal of Magnetism and Magnetic Materials
311
發行號2
DOIs
出版狀態Published - 2007 四月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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