Impact of the Zn–Co content on structural and magnetic characteristics of the Ni spinel ferrites

Influence of SiO2 Embedding on the Structure, Morphology, Thermal, and Magnetic Properties of Co0.4Zn0.4Ni0.2Fe2O4 Particles

“…The physicochemical properties of ferrites are determined by the preparation method, heat treatment, and chemical composition, as well as the type, stoichiometric ratio, and distribution of cations [ 5 , 6 , 7 , 8 , 9 ]. The particle morphology and surface coating may also influence the magnetic behavior of ferrites having the same compositions [ 10 ].…”

“…The most common ways to synthesize nanostructured ferrites are sol-gel, solid-phase, hydrothermal, coprecipitation, auto combustion, sonochemical, microwave refluxing, etc. [ 7 , 10 , 11 ]. The solid-state synthesis produces nanoparticles with high yields and well-controllable grain size [ 3 ].…”

“…By partial substitution of Ni 2+ with Zn 2+ in NiFe 2 O 4 , the Zn 2+ ions will occupy the tetrahedral (A) sites, forcing the Fe 3+ ions to occupy both octahedral (B) and tetrahedral (A) sites. This arrangement of the cations will increase the saturation magnetization ( M S ) of Ni–Zn ferrite, compared to that of NiFe 2 O 4 and ZnFe 2 O 4 [ 6 , 10 , 17 ]. Hence, by varying the substitution degree of the divalent cation, the magnetic behavior of Ni-Zn ferrites can be enhanced, making them fit for a broad range of applications [ 2 , 6 , 17 , 18 ].…”

Sol-Gel Synthesis and Characterization of Yttrium-Doped MgFe2O4 Spinel

“…Spinel ferrites with general formula MFe 2 O 4 (where M = Fe, Co, Mn, Ni, Mg, Cu, Zn) are considered to be an important class of inorganic materials displaying a large variety of properties, including mechanical hardness, chemical stability, high electrical resistivity and good thermal stability [ 1 ]. In addition, these compounds are soft magnetic materials with low coercivity, high magnetization saturation and remnant magnetization at room temperature [ 2 ]. A variety of physical, electrical, dielectric, magnetic, optical and catalytic properties make ferrite spinels applicable in medicine [ 3 ], water and wastewater treatment [ 4 ], nonvolatile memory devices [ 5 ], catalysis [ 6 ], gas sensing [ 7 ], microwave absorption [ 8 ] etc.…”

Microstructure and high frequency electromagnetic parameters of the soft/soft (CoFe2O4)x : (Ni0.4Cu0.2Zn0.4Fe2O4)y nanocomposites

“…This is perspective material for optical 29 and sensing applications, 30 for high-frequency applications (microwave absorber and magnetic recording material and for hyperthermia). 31 When so and hard magnetic phases do exchange coupled with each other, an exchange-spring magnet (with high H c and high M s ) can be produced. By adjusting the microstructure between hard and so phases, the magnetic properties of an exchange-spring magnet can be easily tuned.…”