Structural and Magnetic Properties of (Ni1-xMgx) Fe2O4 Ferrites

We have studied the structural and magnetic properties of (Ni1-xMgx)Fe2O4 ferrite. X-ray diffraction and magnetization measurements were performed for all samples. X-ray results showed that a single phase ferrite was obtained for all samples. The lattice parameter, a, was estimated from the X-ray results and we found that the lattice parameter increases slightly at high Mg^2+ contents (x 0.4). Magnetic hysteresis measured for all samples showed that the coercivity (Hc) shows an appreciable change at low (x = 0.2) and high (x =1.0) Mg^2+ content. It was also found that the saturation magnetization (Ms) and the remanence (Mr) decreases with increasing Mg.