Characterization of Co0.5Mn0.5Fe2O4 nanoparticles

Nickel Substitution Effects on Nano-sized Co, Mn and MnZn Ferrites Synthesized by Sol-gel Method

“…The XRD and SEM results show that the particles increased in size with nickel ion substitution, and this could have led to an increase in the saturation magnetization and coercivity. Similar reports have been presented for Co 0.5 Mn 0.5 Fe 2 O 4 nanoparticles [18], and in Mn 1-2x Zn x Ni x Fe 2 O 4 ferrite powders the coercivity decreased from 79.2 Oe (x = 0.0) to 64.2 Oe (x = 0.1) as the zinc and nickel substitution increased, and this could be related to the increase in the particle size [14,15]. The superparamagnetic phase resulting from the smaller particle size changed to a ferrimagnetic phase at x = 0.1, as confirmed by the Mössbauer spectra.…”

Enhancement of magnetic properties of Ni0.5Zn0.5Fe2O4 nanoparticles prepared by the co-precipitation method

“…The squareness is strongly influenced by magnetic anisotropy of the samples, particle size, shape density and synthesis techniques [45][46]. In the presently investigated samples, M r /M s ranges from 0.24 to 0.39 which is well below the typical value ~1 for single domain isolated ferromagnetic particles.…”

Physical, electrical and magnetic properties of nanocrystalline Zr–Ni doped Mn-ferrite synthesized by the co-precipitation method

“…The drift mobility ( d ) is calculated from electrical resistivity data using the following relation [20]:…”

“…Several cations such as Zn 2+ , Cu 2+ , Co 2+ and Ti 4+ have been attempted by many researchers in order to improve the electrical and magnetic properties of manganese ferrites [18][19][20][21]. Ti 4+ substitution at iron site in manganese ferrites is known to be effective in reducing magneto crystalline anisotropy and enhancing the electrical resistivity, these properties are suitable for wide range of industrial application [21] but it create defects in the crystal structure due to non-stoichiometry.…”