We present magnetic specific heat C m and thermoelectric power S for CeNi 2 (Ge 1−x Si x ) 2 (x = 0 ∼ 0.4) in a wide range of temperatures above 1 K to 300 K. Both C m and S show a characteristic broad peak around 100 ∼ 150 K due to the Kondo effect with high Kondo temperature which is comparable to the crystalline electric field. On the other hand, C m /T and S /T synchronously increase logarithmically at low temperatures on cooling for all x investigated. The anomalous temperature dependence both in C m /T and S /T at low temperatures is interpreted as non-Fermi-liquid behavior due to the proximity to the quantum critical point for x ≤ 0.1, and due to Kondo disorder for x ≥ 0.3.
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