Effect of neodymium substitution on the electric and dielectric properties of Mn-Ni-Zn ferrite

Abstract

© 2018 Elsevier B.V. Ferrite samples of Mn 0.5 Ni 0.1 Zn 0.4 Nd x Fe 2-x O 4 (x = 0.0, 0.01, 0.02, 0.05, 0.075 and 0.1) have been prepared by usual ceramic method. The temperature and composition dependences of the dc electric resistivity (ρ dc ) were studied. The frequency and composition dependences of the ac electric resistivity (ρ ac ) and dielectric parameters (dielectric constant ε’ and dielectric loss ε’’) have been investigated. ρ dc was found to decrease with temperature for all samples while it increases with increasing Nd 3+ concentration. On the other hand, ρ ac and the dielectric properties were found to decrease with increasing the frequency while ρ ac increases and both ε’ and ε” decrease with increasing Nd 3+ concentration. These results were explained by the Maxwell–Wagner two-layer model and Koops's theory. The improvement in dc and ac electric resistivities shows that these prepared materials are valid for decreasing the eddy current losses at high frequencies, so they can be used in the fabrication of multilayer chip inductor (MLCI) devices.