Crystal Field Effect on the Magnetic Properties of Ce_xLa_1−xBi

Abstract

The magnetic susceptibility and high-field magnetization have been measured for powdered samples of Ce_xLa_1−xBi. In the range of x>0.5 the Néel temperature depends linearly on the cerium concentration and it deviates downward from this linear relation for x<0.5. No antiferromagnetic ordering could be observed for x=0.35 above 2.5 K. All antiferromagnetic samples investigated here showed metamagnetic behavior. The saturation magnetization corresponding to the magnetic moment of Ce³⁺ decreases remarkably with decreasing Ce concentration. These characteristics were discussed on the basis of the crystal field and molecular field interactions.