Room temperature magnetic hysterisis loop of the 600°C-ignited sample. A clear loop can be observed in the VSM result which reveals ferromagnetism of the sample. The saturation magnetization is about 155 A·m2/kg, and the coercivity is about 1.59 kA/m. Inset shows the relationship between saturation magnetization of the prepared sample and the ignition temperature.
Hua et al. Nanoscale Research Letters 2012 7:129 doi:10.1186/1556-276X-7-129