Hall effect and specific heat under magnetic fields in CeSi

We have studied a spin fluctuation effect in CeSi by the Hall resistance and the specific heat measurements under several magnetic fields up to 8 T. The Hall resistivity shows peculiar field-dependence at 4.2 K, changing the sign at 5 T. Temperature dependence of the Hall coefficient shows a peak with strong field-dependence below 30 K. Magnetic specific heat is also dependent upon field. It is noted that the field dependence of the peak temperature in the magnetic specific heat has a remarkable resemblance to that of the Hall coefficient. (C) 2003 Elsevier B. V. All rights reserved.