Tuning of magnetic properties in cobalt ferrite by varying Fe +2 and Co +2 molar ratios

Magnetic, electric and thermal properties of cobalt ferrite nanoparticles

“…In the composition range 1<x<2, for particles with sizes around 30 nm, Ms values lower than the bulk one were attributed to the existence of a structural "dead" surface layer, due to the formation of small nanoscale crystallite and residual strains during the sample synthesis [47]. The high saturation magnetization values in this study ( [51]. According to the literature, the decrease in Ms in our study is mainly due to a size effect, the structural disorder at the surface of the particles being relatively more important for small particles.…”

Effect of Bi3+ Ion Substitution on Magnetic Properties of Cobalt Nano Ferrites Prepared by Sol-Gel Combustion Method

“…Along with these properties, the metal oxides produce high magneto chemical interactions, and have high magnetostriction properties. With these properties, the cobalt ferrites have great importance in biomedical sensor applications [4] [5]. In order to synthesise new materials with specific properties, doping of various metal and non-metal cations in the spinal cobalt ferrite is the best method.…”

Cobalt Ferrite Nanoparticles Fabricated via Co-precipitation in Air: Overview of Size Control and Magnetic Properties

“…The fact that there is not enough evidence to indicate a significant difference between Control1 and 1hr is interesting, and perhaps explains why some procedures, such as [40], [41], and others, rely on a reaction time which is shorter than two hours.…”

“…Regarding factors which influence the average particle size of Cobalt Ferrite nanoparticles, Co 2+ concentration has been shown by Ayyappan et al [40] and Biswal et al [41] to be an important factor. They found that Co 2+ concentration and average Cobalt Ferrite particle size are inversely related.…”

“…According to Nam et al [81], the superparamagnetic size is typically 10-20 nm for magnetic oxide nanoparticles. According to Biswal et al [41], particles of size between 11 nm and 15 nm are superparamagnetic.…”