Abstract. Doping magnesium oxide nanoparticles (MgO-NPs) forms a good material for
magnetisation applications. The Room Temperature Ferromagnetic (RTFM) of Pb2+-doped
ions MgO-NPs synthesised by a modified Pechini method are discussed in the present paper.
The structural, morphological and magnetic properties of the samples were characterised by
X-ray diffraction (XRD), Field Emission scanning electron microscopy (FE-SEM), Energy
Dispersive Spectroscopy (EDS) and vibrating sample magnetometer (VSM).
The XRD results showed that the synthesised materials have a single set of peaks in the XRD
patterns, corresponding to the cubic phase of MgO-NPs. As the Pb content increased in the
host MgO-NPs leading to an increase in the lattice parameter, the interplanar spacing and the
crystallite size; however, the intensity decreased.
Small spherical nanoparticles (22.87–29.05nm) were observed in the Pb2+-doped ions MgO
samples by (FE-SEM). The purity of the samples was confirmed using EDS spectroscopy.
The pure MgO and doped samples exhibiting RTFM may be attributed to vacancy defects,
which caused local magnetisation. The saturation magnetism (Ms) was found to be varied as
a function of doping concentration. The maximum (Ms) was found at x=0.015 of
Mg0.985Pb0.015O sample. The obtained results suggest that both Pb doping and oxygen
vacancies play an important role in the development of room-temperature ferromagnetism.