Abstract

We find that CePtSi is a new heavy-fermion and coherent dense Kondo-lattice compound with no magnetic or superconducting transition above 70 mK. Measurements of the magnetic contribution to the electrical resistivity, static magnetic susceptibility, and low-temperature heat capacity of CePtSi are reported. This compound has a large value of the low-temperature magnetic susceptibility (chi(2.4 K) = 24.9 x 10/sup -3/ cm/sup 3//mol) and, characteristic of heavy-fermion compounds, an enormous coefficient of the electronic specific heat, ..gamma..approx.800 mJ/molX sup 2: .

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