Synthesis and characterization of nanocrystalline Zn ferrites substituted with Ni

Structural, magnetic and dielectric studies of copper substituted nano-crystalline spinel magnesium zinc ferrite

“…Samples with concentration x = 0.4 and x = 0.5 exhibit higher percentage porosity around 6% which may attributed to the increase of their particle sizes as indicated in Table 2. This dependence between porosity and particles size has been reported for some ferrites [28]. site because the preferency of copper ions to be in the octahedral sites(B-sites) [29].…”

Microstructure and magnetic properties of substituted (Cr, Mn) - cobalt ferrite nanoparticles

“…The spectra of the calcined powders exhibit two vibrational bands, the higher frequency band located around 600 cm À1 (n 1 ) and the lower frequency band ranged around 400 cm À1 (n 2 ). The n 1 is assigned to the intrinsic vibrations of metaleanion complexes at the tetrahedral sites (M th eO) and n 2 corresponds to octahedral metal stretching (M oh eO) of the spinel lattice [29]. M th eO and M oh eO correspond to the tetrahedral and octahedral metal-oxygen vibrations of the spinel lattice respectively.…”

Enhancement of the magnetic and dielectric properties of cobalt nanoferrite/polymethyl methacrylate composites

“…The dielectric properties of these materials strongly depend on the preparation techniques. The ferrite synthesis by wet methods gains the primary attention of the researchers due to their advantages over the solid state methods, implying low costs, environmental friendly precursors, high purity of materials obtained and a better control of their structural features and consequently, desirable properties [1]. Cobalt ferrite, CoFe 2 O 4 , is a well known magnetic material with very high cubic magnetocrystalline anisotropy, high coercivity, and moderate saturation magnetization.…”