Magnetic susceptibility of cerium oxides

Abstract

The magnetic susceptibilities of CeO_1·515, CeO_1·662, CeO_1·705, CeO_1·780, CeO_1·857, and CeO_1·941 were measured as a function of temperature between 80 and 300°K. The results for CeO_1·515 were compared with the magnetic susceptibility of the Ce³⁺ ion in dilute solid solution in LaO_1·5. It was found that the apparent Curie-Weiss law which was obeyed over the temperature range studied was due to crystal field effects. Although no magnetic ordering transitions were observed in the experimental temperature range, all the compounds except CeO_1·941 exhibited evidence of antiferromagnetic exchange interaction.