Magnetic Behaviors of Ca2FeMoO6 without Double Mixture Gas Protection under Heat Treatment

Abstract

Abstract The Ca2FeMoO6 ceramics powder were prepared by solid state reaction involving compression and high temperature calcine. The magnetic properties arise from the environments of the Fe 3+ and Mo 5+ oxidation states which can be modified, with heat treatment at 800 °C and different dwell times exhibited the largest hysteresis loop at 50 K. In addition, the CFMO powder at the high temperature of 800 °C for 10 hours exhibited a high Ms~1.494 emu/g at 50 K and ~0.601emu/g at room temperature. Using the Curie-Weiss law fitting to determine μeff~28.121μB high spin of Fe and Mo, and a negative θ indicates antiferromagnetic characteristics of the CFMO sample.