thermopower and its magnetic field effect on Ce and Sm compounds having a resistivity behavior of divergent type

In this study, we have prepared a large number of new Ce compounds having a chemical formula CeTX (T=Ni, Pd or Pt, X=Sn, In or Ge) and measured their resistivity and thermopower. The results are full of variety showing characteristic and different nature of Kondo effect of each compound. We found a close relation of an initial slope of thermopower and the electronic specific heat at low temperature. We found some of typical types of thermopower behavior of Kondo compounds at the ferromagnetic Curie temperature or at the antiferromagnetic Neel temperature. However, as for Sm compounds, those we have studied mostly did not show Kondo effects. Further study must be carried out for Sm compounds.