Non-Fermi Liquid Behavior in Dilute Quadrupolar System Pr\(_{x}\)La\(_{1-x}\)Pb\(_3\) with $x$$\le$0.05

We have studied the low-temperature properties of Pr\(_{x}\)La\(_{1-x}\)Pb\(_{3}\) with non-Kramers \(\Gamma_{3}\) quadrupolar moments of the crystal-electric-field ground state, for a wide concentration range of Pr ions. For $x$$\le\(0.05, the specific heat \)C/T\( increases monotonically below \)T\(=1.5 K, which can be scaled with a characteristic temperature \)T^{*}\( defined at each concentration \)x\(. The electrical resistivity \)\rho$$(T)\( in the corresponding temperature region shows a marked decrease deviating from a Fermi-liquid behavior \)\rho$$(T)$$\propto$$T^{2}\(. The Kondo effect arising from the correlation between the dilute \)\Gamma_{3}$ moments and the conduction electrons may give rise to such anomalous behavior.