Abstract
Abstract We report the low temperature physical properties of polycrystalline R3NiSi3 (R = La and Ce) which crystallizes in orthorhombic (Space group Immm) structure. The results of our comprehensive study by means of magnetic, electrical transport and thermodynamic measurements suggest that Ce3NiSi3 orders antiferromagnetically below T N ∼ 6 K. Electrical resistivity and magnetoresistance data of Ce3NiSi3 resembles with that observed in usual Ce based Kondo lattice/heavy fermion (HF) compounds. Electrical resistivity and heat capacity are significantly influenced by the crystal electric field (CEF) effect. An enhanced value of Sommerfeld coefficient (∼118.5 mJ/mol K2) strongly indicates HF behavior of Ce3NiSi3.
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