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- W2765683313 abstract "Investigation of Anderson lattice behavior in Yb 1−x Lu x Al 3 E. D. Bauer, 1 C. H. Booth, 2 J. M. Lawrence, 3 M. F. Hundley, 1 J. L. Sarrao, 1 J. D. Thompson, 1 P. S. Riseborough, 4 and T. Ebihara 5 Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA University of California, Irvine, California 92697, USA Temple University, Philadelphia, Pennsylvania 19122, USA Shizuoka University, Shizuoka 422-8529, Japan (Dated: October 6, 2003) Abstract Measurements of magnetic susceptibility χ(T ), specific heat C(T ), Hall coefficient R H (T ), and Yb valence ν = 2 + n f [f -occupation number n f (T ) determined from Yb L 3 x-ray absorption measurements] were carried out on single crystals of Yb 1−x Lu x Al 3 . The low temperature anomalies observed in χ(T ) and C(T ) corresponding to an energy scale T coh ∼ 40 K in the intermediate valence, Kondo lattice compound YbAl 3 are suppressed by Lu concentrations as small as 5% suggesting these low-T anomalies are extremely sensitive to disorder and, therefore, are a true coherence effect. By comparing the temperature dependence of various physical quantities to the predictions of the Anderson Impurity Model, the slow crossover behavior observed in YbAl 3 , in which the data evolve from a low-temperature coherent, Fermi-liquid regime to a high temperature local moment regime more gradually than predicted by the Anderson Impurity Model, appears to evolve to fast crossover behavior at x ∼ 0.7 where the evolution is more rapid than predicted. These two phenomena found in Yb 1−x Lu x Al 3 , i.e., the low-T anomalies and the slow/fast crossover behavior are discussed in relation to recent theories of the Anderson lattice. PACS numbers: 75.30.Mb,75.20.Hr,71.27.+a,71.28.+d" @default.
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- W2765683313 date "2003-10-06" @default.
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- W2765683313 title "Investigation of Anderson lattice behavior in Yb1-xLuxAl3 - eScholarship" @default.
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