nanoparticles (crystallite size of 68 nm) prepared by egg white
solution route [27] but lower than the theoretical saturation
magnetization of 50 emu/g calculated using Neel’s sublattice theory
and the reported value of 56 emu/g for the bulk sample [28]. The
saturation value of 55.3 emu/g obtained in the CoFe2O4 (diameters of
8.5 1.9 nm) is lower than values of 80 emu/g for bulk CoFe2O4 [29]
and 65 emu/g for the CoFe2O4 nanoparticles with crystallite size of
40 nm prepared by aerosol route [30], while it is higher than
the values of 30 emu/g for hydrothermal-synthesized CoFe2O4
nanoparticles (diameters of 30 nm) [31]. The saturation value of
52.4 emu/g obtained in the MnFe2O4 (diameters of 15.9 5.1 nm) is
lower than values 67 emu/g for synthesized octahedral MnFe2O4
crystallites using a TEA-assisted route under mild conditions
(diameters of 1 mm) [32], but is higher than the value of
48.6 emu/g for polymer-pyrolysis route MnFe2O4 nanoparticles
(diameters of 9 nm) [33]. The saturation value of 68.9 emu/g
obtained in the MgFe2O4 (diameters of 45.3 15.1 nm) is higher
than the value of 48.6 emu/g for MnFe2O4 nanostructures fabricated
Fig. 3. T