Add time:07/25/2019         Source:sciencedirect.com

Magnetic susceptibility measurements have been performed on the ovide system of californium. Poly crystalline samples of Cf2O3 (cubic and monoclinic), Cf7O12, CfO2 and BaCfO3 have been studied at magnetic fields up to 50 kG and temperatures between 4.2 and 340 K. All the ovides evhibit Curie-Weiss behavior above 100 K. In all cases, the paramagnetic effective moments are in reasonable agreement with the free-ion, intermediate-coupling value for the 3+ and 4+ charge states assigned on the basis of the stoichiometry. Antiferromagnetic ordering is observed in all these ovides at temperatures below 20 K. Crystal field effects are evident in the temperature range between about 20 and 100 K.

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