Ni0.4Co x Cd0.6 − x Fe2O4 ferrites as prepared by autocombustion synthesis

Abstract

Ni0.4CoxCd0.6−xFe2O4 ferrites (x = 0.0, 0.2, 0.4, and 0.6) were prepared by autocombustion synthesis and characterized by XRD, SEM, and other physical methods. XRD reveals the formation of spinel structure without any impurity phase. With increasing x, the lattice parameter was found to decrease from 8.60 to 8.37 A. The FTIR spectra show the presence of tetrahedral site (at 571.12 cm−1) and octahedral site (at 407.07 cm−1). SEM images indicated the formation of agglomerated grains with a size of about 4.3 μm. The resistivity of the ferrites was found to decrease from 24.53 to 10.02 × 108 Ω cm while the drift mobility to increase from 2.30 to 4.41 × 108 cm2 V−1 s−1 with increasing x.