The effect of annealing on the structure and magnetic properties of ZnCrFeO₄
by Ahmed M. Al-Saie
International Journal of Nanoparticles (IJNP), Vol. 5, No. 1, 2012

Abstract: Nanosized spinel phase of the composition ZnCrFeO₄ has been successfully synthesised by a simple combination of milling of ZnO-Cr₂O₃-Fe₂O₃ mixture oxides and subsequent annealing at 600°C, 750°C, and 900°C respectively. X-ray diffraction analysis reveals that the spinel phase appears already during milling with some residue of the starting oxides. With further annealing, the spinel phase amount within the mixture powder increases while the amount of the remaining oxides reduces and then disappeared. Vibrating sample magnetometer (VSM) measurements show that the magnetic properties vary accordingly and hence confirming the phase composition changes occurring within the powder mixture. At 900°C, a single nanosized ZnCrFeO₄ was obtained with an average crystallites size of 85 nm and a saturation magnetisation of 3.45 emu/g.

Online publication date: Wed, 20-Aug-2014

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