We have measured the electrical resistivity, Hall coefficient, magnetoresistance, magnetic susceptibility and magnetization of a dense Kondo substance Ce x La 1- x Cu 6 ( x =0-1). The dilute Kondo impurity state is found to be retained below x =0.1-0.2 in Ce x La 1- x Cu 6 , having a constant value of the unitarity limit in the magnetic resistivity. On the other hand, the Kondo lattice is formed above x =0.8-0.9 because the magnetic resistivity decreases with the decrease of the temperature and the temperature dependence of negative magnetoresistance shows a minimum around 1 K.
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Ōnuki et al. (1985) studied this question.
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