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- W1991469717 abstract "We report a study of muon Knight shifts to investigate the formation of the heavy-fermion state in single crystals of ${({text{Ce}}_{1ensuremath{-}x}{text{La}}_{x})}_{2}{text{IrIn}}_{8}$. Two different kinds of Knight-shift anomalies (deviations from a linear relation between the Knight shift and the susceptibility) are found: (1) a high-temperature effect arising from depopulation of crystalline electric field levels with temperature, and (2) a lower-temperature anomaly arising from the onset of the heavy-fermion state below a characteristic temperature ${T}^{ensuremath{ast}}$, in agreement with the ``two-fluid'' model of heavy-fermion formation. In ${text{Ce}}_{2}{text{IrIn}}_{8}$, we find ${T}_{c}^{ensuremath{ast}}=20.0(6)text{ }text{K}$ and ${T}_{a}^{ensuremath{ast}}=15.2(1.2)text{ }text{K}$ for applied field $Hensuremath{parallel}c$ axis and $Hensuremath{parallel}a$ axis, respectively. For the Ce diluted systems ${({text{Ce}}_{1ensuremath{-}x}{text{La}}_{x})}_{2}{text{IrIn}}_{8}$, $x=0.1$, 0.25, 0.50, 0.70, and 0.90, ${T}^{ensuremath{ast}}$ decreases linearly for $xensuremath{le}0.5$, reaching zero near $x=0.7$, indicating the reduction in intersite $f$-spin correlations with Ce dilution. A comparison with nuclear magnetic-resonance measurements of Knight-shift anomalies in several other heavy-fermion compounds suggests that the observed small anisotropy in ${T}^{ensuremath{ast}}$ may be induced by the applied field, and that ${T}^{ensuremath{ast}}$ may be inherently isotropic, even in highly anisotropic materials." @default.
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- W1991469717 date "2009-09-08" @default.
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- W1991469717 title "Development of the heavy-fermion state in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>Ce</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>IrIn</mml:mtext></mml:mrow><mml:mn>8</mml:mn></mml:msub></mml:mrow></mml:math>and the effects of Ce dilution in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:…" @default.
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- W1991469717 doi "https://doi.org/10.1103/physrevb.80.125104" @default.
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