TY - JOUR
T1 - Observation of RKKY-Kondo competition and non-fermi-liquid behavior in the intermetallic compound series Ce(Cu 1-x Ni x )Si 2
AU - Lu, J. J.
AU - Mo, T. S.
AU - Gan, K. J.
AU - Lin, T. C.
AU - Lee, M. K.
N1 - Funding Information:
Acknowledgements This work was supported by the National Synchrotron Radiation Research Center of ROC and National Science Council of the Republic of China under contract No. NSC 97-2112-M-168-001-MY2.
PY - 2010/12
Y1 - 2010/12
N2 - We study Kondo-RKKY competition in the intermetallic compound series Ce(Cu 1-x Ni x )Si 2 (x=0, 0.2, 0.4, 0.6, 0.8, 1.0) by performing X-ray diffraction, electrical resistivity, magnetic susceptibility measurements and Ce-L III-edge X-ray absorption spectra. The results reveal that RKKY interaction dominates and leads to spin-glass behavior at the Cu rich end. For the Ni rich end the Kondo effect prevails and drives the system towards an intermediate-valence regime with nearly quenched magnetism. According to the experimental result, we are able to obtain a phase diagram similar to Theumann's theoretical model. This work also observed non-Fermi-liquid behavior from the ρ(T) and χ(T) measurements at x=0.6, indicating this series to lie in the vicinity of a quantum critical point at this content.
AB - We study Kondo-RKKY competition in the intermetallic compound series Ce(Cu 1-x Ni x )Si 2 (x=0, 0.2, 0.4, 0.6, 0.8, 1.0) by performing X-ray diffraction, electrical resistivity, magnetic susceptibility measurements and Ce-L III-edge X-ray absorption spectra. The results reveal that RKKY interaction dominates and leads to spin-glass behavior at the Cu rich end. For the Ni rich end the Kondo effect prevails and drives the system towards an intermediate-valence regime with nearly quenched magnetism. According to the experimental result, we are able to obtain a phase diagram similar to Theumann's theoretical model. This work also observed non-Fermi-liquid behavior from the ρ(T) and χ(T) measurements at x=0.6, indicating this series to lie in the vicinity of a quantum critical point at this content.
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U2 - 10.1007/s10948-010-0798-5
DO - 10.1007/s10948-010-0798-5
M3 - Article
AN - SCOPUS:78649635896
SN - 1557-1939
VL - 23
SP - 1473
EP - 1477
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
IS - 8
ER -