Characterization of Antiferromagnetism in Double Perovskites Ba_2FeMoO_6 Prepared by Solid State Method

摘要

The magnetic properties of Ba_2FeMoO_6 (BFMO) double perovskite are investigated. BFMO samples were prepared by solid state reaction method through compression. Magnetic properties are influenced by electron environments of the Fe~(3+) and Mo~(5+) ions within the perovskite structure. BFMO sintered at 800°C exhibited the largest hysteresis loop at 50 K. In addition, the values of Ms and Mr indicate ferromagnetic behaviour in BFMO ceramics sintered at 800°C for different times up to 10 hours. Using the Curie-Weiss law fitting to investigate μeff～30μ_B high spin of Fe and Mo, and negative 0 present the antiferromagnetic characteristics of the BFMO sample.