Structure and Microstructure in Relation to Magnetic/Dielectric Properties of Nanocrystalline Ni1−x Zn x Fe1.5Cr 0.5O4 Ferrite

Abstract

Nanocrystalline Ni 1−x Zn x Fe 1.5 Cr 0.5 O 4 (0 ≤ x ≤ 0.5) ferrite was prepared using a citrate method. The influence of Zn 2+ ion substitution on structure, magnetic, and electric properties of the Ni 1−x Zn x Fe 1.5 Cr 0.5 O 4 ferrite has been investigated. The X-ray diffraction results confirmed the formation of a single phase with a spinel cubic structure for Ni 1−x Zn x Fe 1.5 Cr 0.5 O 4 samples. The magnetization was found to be influenced by the surface spin canting angles, the porosity percentage, and the cation distributions. The variation of dielectric constant with temperature indicated that the investigated materials can be recommended to be used as good insulating ceramic materials at room temperature and as a semiconductor at higher temperatures.

Tunable Magnetic and Electrical Properties of Cobalt and Zinc Ferrites CO1-XZnXFe2O4 Synthesized by Combustion Route

“…Co 0.2 Zn 0.8 Fe 2 O 4 has a behavior of paramagnetic material, as noted by the hysteresis curve, almost linear, and with a small saturation of magnetization and with a small coercitivity, showing up as a magnetically soft material, which has possibilities of applications in antennas and other devices in wireless communication systems, especially in the microwave region 37,38 . Co 0.8 Zn 0.2 Fe 2 O 4 has high magnetization and low hysteresis loss of energy.…”

“…Applications of materials with these features are used in devices that require antennas with receiving technology, which is needed to operate at high frequencies of terahertz order, due to their very low electrical permittivity as well in the use of devices of dielectric antenna technology (DRA) as being an excellent option. The toroidal cores of switched-mode power supply transformers uses ferrites materials with these characteristics [37][38][39] . These materials have characteristics which allows their use both as insaturable reactors, and in switched-mode power supply transformers, with high dielectric constant and low loss rate, making them potential candidates for microwave and dielectric resonators [40][41][42] .…”

Synthesis and characterization of Co-doped Manganese ferrite nanoparticles

“…The lattice energy (U) U = −3.108 (𝑀𝑣 𝑚 ) × 10 −12 (18) The values of the longitudinal (Vl), transverse (Vt), mean (Vm) velocity, and the elastic parameters; B, G, E, and U are shown in Figure (6). Three main factors that govern the behavior of all these parameters are as follows:…”

“…The degree of inversion (δ) represents the concentration of divalent ions in the octahedral site. For a fully inverted spinel ferrite, all the divalent ions occupying the B-site and trivalent Fe 3+ ions are equally distributed between the A-and B-sites [3][4][5][6]. M can be a mixture of divalent ions, whereas, transition or/and rare earth trivalent ions partially substitute Fe 3+ ions [7][8][9][10].…”