Abstract
The physical properties of an intermetallic compound CeRh2Ga2 have been investigated by magnetic susceptibility , isothermal magnetization M(H), heat capacity , electrical resistivity , thermal conductivity and thermopower S(T) measurements. CeRh2Ga2 is found to crystallize with CaBe2Ge2-type primitive tetragonal structure (space group P4/nmm). No evidence of long range magnetic order is seen down to 1.8 K. The data show paramagnetic behavior with an effective moment /Ce indicating Ce3+ valence state of Ce ions. The data exhibit Kondo lattice behavior with a metallic ground state. The low-T data yield an enhanced Sommerfeld coefficient mJ/mol K2 characterizing CeRh2Ga2 as a moderate heavy fermion system. The high-T and show an anomaly near 255 K, reflecting a phase transition. The suggests phonon dominated thermal transport with considerably higher values of Lorenz number L(T) compared to the theoretical Sommerfeld value L0.
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