Electronic structure and thermoelectric power of CeNi4Si

The studies of the thermoelectric power and band structure calculations for CeNi4Si are reported. These studied are supported by magnetic susceptibility, electrical resistivity, specific heat and X-ray photoemission spectroscopy measurements. CeNi4Si is paramagnetic down to 2 K and follows the Curie-Weiss law with mu(eff) = 0.52 mu(B)/f.u. and the paramagnetic Curie temperature theta p = -2 K. This effective paramagnetic moment is lower than the free Ce3+ value. The obtained values for the f occupancy nf and for the coupling Delta of the f level with the conduction states are in good agreement with the values found for mixed valence compounds. Below the Fermi energy the total density of states contains mainly the d states of Ni atoms. The narrow peaks of the f states of Cc atoms were found above the Fermi level. CeNi4Si is characterized by gamma = 16 mJ mol(-1) K-2 and theta(D) = 335 K. (c) 2006 Elsevier B.V. All rights reserved.