Specific heat of CeNi4Si compound

Abstract Specific heat data of CeNi 4 Si have been analyzed considering the electronic contribution C e = γT ( γ =22 mJ/mol K 2 ) and the lattice contribution C ph , using both the Debye and Einstein models for 3-acoustic and 15-optical phonon branches. Optical branches were divided to three groups with different degeneracy n E . This approach yields the Debye temperature Θ D =183 K and the Einstein temperatures Θ E i =155, 290 and 460 K. No significant magnetic contribution was found in this compound. The results correspond with previous results of susceptibility measurements where only low value of an effective magnetic moment μ eff =0.52 μ B /f.u. was found.