Structural, magnetic and dielectric behavior of Mg1−xCaxNiyFe2−yO4 nano-ferrites synthesized by the micro-emulsion method

Structure and magnetic properties evolution of nickel–zinc ferrite with lanthanum substitution

“…are a technologically important group of materials owing to their diverse applications in high-density magnetic recording, ferrofluids technology, biomedical drug delivery, catalysis, energy storage, gas sensors, and magnetic resonance imaging (MRI) [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Within this group, Ni-Zn ferrites is a kind of very important soft magnetic material.…”

Nanocrystalline Zn1− Co0.5Ni0.5 Fe2O4 ferrites: Fabrication via co-precipitation route with enhanced magnetic and electrical properties

“…The results obtained from cell software and above relation were same and are given in table 1.The lattice parameter decreased with the increase in Ni and Co concentration that is justified by the substitution of relatively larger ionic radius (0.82Å) Zn 2+ ions with smaller ionic radius Co 2+ (0.74 Å) [6,8,16,17] and Ni 2+ (0.69 Å) [16,18,19]. As the ionic radii of Co 2+ and Ni 2+ is smaller as compared with that of Zn 2+ therefore the substitution of Co 2+ and Ni 2+ in place of Zn 2+ attributed to the decrease in lattice parameter [15,[20][21][22][23][24].The X-ray density for all compositions is calculated using the following relation [25,26] (table 1).…”

“…It is clear from the figure that the hysteresis loops are 'S' shaped and saturated at higher field values and these are the characteristics of ferromagnetic materials [8]. The soft magnetic nature of these spinel ferrites is confirmed by the narrow curves or low values of coercivity [6,18]. Table 3 shows the values of different magnetic parameters i.e.…”

Structural and magnetic behavior evaluation of Mg–Tb ferrite/polypyrrole nanocomposites

“…The decreasing of the crystalline size with the addition of polymer may be attributed to the fact that higher the porosity the smaller the crystallite size [18]. X-ray densities for all samples were also calculated using the following equation [19] and are shown in Table 2.…”