抄録
Superconducting and magnetic properties of the Chevrel compounds CexLa1−xMo6S8 were investigated by electrical resistance, magnetoresistance and magnetic susceptibility in a temperature range down to 0.4 K. Superconducting properties with low x are well explained by the matsuura-Ichinose-Nagaoka theory based on the Kondo effect with a range of TK⁄Tc0=0.01∼0.001. The magnetic susceptibility per mol Ce is independent of the Ce concentration and it is explained by the crystal field splitting and Kondo effect. A model of crystal field splitting which consists of three doublets with the excited energy of 10 K and 400 K in CeMo6S8 is proposed. A large negative magnetoresistance was found below 10 K for CeMo6S8. Magnetic and superconducting phase diagram of CexLa1−xMo6S8 was determined.
