Observation of the Quantum Critical Behavior in the Evolution from Spin-Glass to Intermediate-Valence Behavior in Ce2Cu1−x Co x Si3 Series

In this study, we report the results of electrical resistivity, magnetic susceptibility, and Ce-LIII-edge X-ray absorption spectrum measurements for a solid solution series Ce2Cu1?x Co x Si3. In the series, Ce2CuSi3 exhibits spin-glass behavior, whereas Ce2CoSi3 displays intermediate-valence behavio...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2013-06, Vol.26 (6), p.2175-2179
Main Authors: Lu, J. J., Gan, K. J., Mo, T. S., Lin, T. C.
Format: Article
Language:English
Subjects:
Displays
Electrical resistivity
Evolution
Magnetic permeability
Magnetism
Solid solutions
Superconductivity
X-rays
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Summary:In this study, we report the results of electrical resistivity, magnetic susceptibility, and Ce-LIII-edge X-ray absorption spectrum measurements for a solid solution series Ce2Cu1?x Co x Si3. In the series, Ce2CuSi3 exhibits spin-glass behavior, whereas Ce2CoSi3 displays intermediate-valence behavior. We report the direct observation of the evolution from the RKKY interaction prevailing regime to the non-magnetic intermediate-valence regime in this solid solution series. In addition, we find non-Fermi-liquid behavior from the ?(T) and ?(T) measurements at x=0.4. Based on the data, it is inferred that at this content, the system is located at the vicinity of the quantum critical point of the evolution.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-012-1811-y