Influence of magnesium-substituted Ni–Zn ferrites on magnetic and electric losses at lower frequency

Abstract

Ni[Formula: see text]Zn[Formula: see text]Mg[Formula: see text]Fe2O4 ([Formula: see text]) with lower compositions of magnesium were synthesized by the sol–gel method and sintered at 1080[Formula: see text]C for 4 h. X-ray diffraction (XRD) patterns suggest the single phase nature of the spinel-type ferrite and increase in lattice parameter for increasing magnesium content. Surface morphology reveals that grain size increases with increasing magnesium concentration. Magnesium substitution in Ni–Zn ferrites showed influence on the interatomic distance for tetrahedral A sites and octahedral B sites calculated using the standard formula. Conductivity along with dielectric measurements gives additional information on the transport mechanism for magnesium substitution in Ni–Zn ferrites calculated at lower frequencies. Both magnetic loss and dielectric loss were investigated at lower frequency to understand the losses associated with domain wall contribution for magnesium-substituted Ni–Zn ferrites.