Morphology and magnetic properties of Co0.8Fe2.2O4 films prepared by the chemical solution deposition

Correlation between Cation Distribution and Magnetic and Dielectric Properties of Dy3+-Substituted Fe-Rich Cobalt Ferrite

“…Baik et al have reported that (111)-oriented C 0.8 Fe 2.2 O 4 single-layer films have a strong in-plane magnetic anisotropy as a result of orientation and stress-induced magnetic anisotropy . Zi et al reported that the Co 0.8 Fe 2.2 O 4 films, which were prepared by chemical solution deposition, can be used for recording and magneto-optical applications . Similarly and specific to this particular topic, based on our extensive studies on intrinsic CFO, as reported previously elsewhere, it is observed that CFO has the highest strain sensitivity, (dλ/d H ) ∼1.432 nm/A (for H ≤ 1000 Oe) .…”

“…20 Zi et al reported that the Co 0.8 Fe 2.2 O 4 films, which were prepared by chemical solution deposition, can be used for recording and magneto-optical applications. 19 Similarly and specific to this particular topic, based on our extensive studies on intrinsic CFO, as reported previously elsewhere, it is observed that CFO has the highest strain sensitivity, (dλ/dH) ∼1.432 nm/A (for H ≤ 1000 Oe). 14 From these considerations, it is appealing to further investigate Fe-rich CFO and explore new avenues for possible enhancement in properties and performance by means of suitable dopants/cations.…”

“…Rare-earth substitution (Gd 3+ , Dy 3+ , Er 3+ , etc.) in cobalt ferrite is extensively studied due to the highly interesting and tunable magnetic properties of the resulting materials. ,− However, for intrinsic and substituted/doped nanoferrites, the properties and performance characteristics are significantly affected by the particle size, size distribution, and cation distribution at A- and B-sites in the crystal structure. ,− Even a slight change in the method of synthesis and/or processing parameters along with precursor chemicals in the synthesis can result in variability in microstructure, crystal chemistry, and material properties. ,− For instance, Aziz et al showed comparisons of the properties of Dy 3+ -substituted cobalt ferrite between ultrasonication using ethanol and dry grinding, and the properties of magnetic materials changed . Thus, as evident from the literature, the degree of inversion depends on heat treatment, synthesis method, concentration, and nature of substituted ions. , …”

“…Additionally, CFO exhibit excellent thermal and chemical stability . All of these properties make cobalt ferrite an excellent candidate for many industrial applications. − At present, CFO are at the center of research activities, where efforts are primarily directed to obtain enhanced and/or variable properties by simply doping different cations with varying amounts. ,− The attention given to intrinsic or doped-CFO is primarily due to their fundamental properties and potential applications in different areas, such as magnetic hard drives, ,, magnetic ferrofluid technology, , magnetocaloric refrigeration, chemical sensors, ,, photocatalysis and cleaner fuel production, rod antennas, good-quality filters and magnetic field sensors, ,,,, and magnetostrictive phase in magnetoelectric (ME) composite materials . Furthermore, cobalt ferrite, owing to its magnetocrystalline anisotropy, high coercivity, and chemical stability, has been used widely in automotive and environmental engineering. , In these fields, special attention is given to device applications, such as sensors, environmental protection, catalysis, microwave absorption, etc .…”