Facile Synthesis of Ni2+ Doped MgFe2O4 Spinel Nanoparticles: Structural, Optical, Magnetic, and Dielectric Behavior

Nickel-doped magnesium cubic spinel ferrite nanoparticles (NPs) were prepared through the microwave combustion method (MCM). The structure of magnesium ferrite normal spinel is obtained from XRD analysis. The average crystallite size is between 26 and 17 nm. The elemental compositions and oxidizing states of Ni2+ doped MgFe2O4 ferrites were evaluated by using XPS analysis. The morphology of spinel nanoparticles was studied using HR-SEM images. The energy dispersive X-ray method is used for ensuring the presence of elements and the band gap value 2.09, 2.02, 1.85, and 1.82 eV have been obtained using the tau"c relation. The magnesium spinel structure is confirmed in the band at 434 and 561 cm−1 which corresponds to the stretching vibration of the octahedral site (Mg2+–O2−) and tetrahedral site (Fe3+–O2−) respectively. From the hysteresis loops the magnetic features viz. Hc, Mr, and Ms were determined. Further dielectric studies and AC conductivity of the prepared samples are performed.

Facile Synthesis of Ni2+ Doped MgFe2O4 Spinel Nanoparticles: Structural, Optical, Magnetic, and Dielectric Behavior Articles