Two-ion-interaction and crystal-field effects on the resistivity and susceptibility of hybridizing cerium systems

We have studied the influence of the crystalline field and the two-ion anisotropic interaction on the static susceptibility and electrical resistivity of moderately hybridizing cerium systems. We transform the hybridization into a band-f resonant scattering, and to calculate the resistivity we treat the scattering in third-order perturbation theory for ionic levels split by the crystal-field and two-ion interactions. For CeBi and CeSb we include effects associated with transitions between different magnetic structures. The calculated resistivity matches the main features of the experimental behavior: a negative-temperature-slope resistivity above the N\'eel temperature (TN) and a very rapid drop below TN; however, for CeBi the present calculations yield a smaller temperature slope above TN than experiment. For the inverse static susceptibility, in good agreement with experiment, we obtain Curie-law behavior in the paramagnetic regime and a very rapid increase in the magnetically ordered regime.