Fabrication, characterization and magnetic behaviour of alumina-doped zinc ferrite nano-particles

Novel preparation and properties of magnesioferrite nanoparticles

“…This conclusion might find evidence from a progressive shift of the diffraction peaks of MgFe 2 O 4 to higher Bragg's angle with the rise in the G/N ratio. The intensities of the (2 2 0), (4 4 0) and (5 1 1) planes are more sensitive to the cations on tetrahedral, octahedral and the oxygen ion parameters respectively [28,29,36]. Table 1 shows the observed intensities of the above three planes.…”

“…But the augmentation in the G/N ratio above this limit resulted in slight increase in the peak height of Mg ferrite phase. The enhancement of ferrite formation due to the increase in the ratio of G/N had been attributed to an effective increase in the mobility of Mg and Fe cations taking part in the ferrite formation depending upon the rise in the reaction temperature [28,29,36]. This conclusion might find evidence from a progressive shift of the diffraction peaks of MgFe 2 O 4 to higher Bragg's angle with the rise in the G/N ratio.…”

“…It is seen from Table 1 that the increase in amount of glycine added to the investigated system brought about a progressive increase in the value of I phase /I standard indicating an increase in the magnesium ferrite formation. The promotion effect of glycine as fuel in the formation of cubic spinel structure of magnesium ferrite could result from an induced increase in the concentration of the reacting species and/or increase in their mobility [28,29,36].…”

“…It can be seen from this table that the rise in the G/N ratio brought about an increase in the values of all structural parameters except the X-ray density. The observed changes in the mentioned parameters could be attributed to an increase in the flame temperature which assists crystal growth and/or the redistribution of cations among octahedral and tetrahedral sites [28,29,36].…”

Structural and magnetic studies of Mg(1−x)ZnxFe2O4 nanoparticles prepared by a solution combustion method

“…concentration. In other words, the observed variation in magnetization can be due to many factors such as cation redistribution, existence of point defects in the spinel structure or the formation of spin glass structure at the nano sizes [27,28]. The small values of M r /M s and H C suggest the existence of multi domain (MD) particles in all the samples [15].…”