Gadolinium substitution and sintering temperature dependent electronic properties of Li–Ni ferrite

Physical and electromagnetic properties of nanosized Gd substituted Mg–Mn ferrites by solution combustion method

“…Generally, it can be mentioned that in this study, the formation of the secondary phase at the grain boundaries may affect the homogeneous composition and microstructure, and induce some distortion in the internal grain region which lead to larger internal stress. Al-Hilla et al [10] had worked on gadolinium substituted Li-Ni ferrite. They observed that there was a limited solubility of Gd ion in the spinel structure of Li-Ni ferrite and Gd 3 þ ions would precipitate as a secondary phase of GdFeO 3 at the grain boundaries, which may inhibit the grain growth in the samples.…”

Dielectric and impedance study of polycrystalline Li0.35−0.5Cd0.3Ni Fe2.35−0.5O4 ferrites synthesized via a citrate-gel auto combustion method

“…They have observed an anomalous temperature dependent magnetic ordering for higher concentrations of Cd. Several investigations on the properties of Li-Cd [15], Li-Zn [16], Li-Zn-Mn [17], Li-Ni [18], Li-Ni-Gd [19] and Li-Ni-Cu [9] ferrites have been reported. However, no report has been found in the literature on the temperature variation of impedance and dielectric properties of Li-Cd-Ni ferrites, synthesized using citrate-gel auto combustion method.…”

Improving soft magnetic properties of Mn-Zn ferrite by rare earth ions doping

“…Previous work reported that there was a limited solubility of rare earth ions in the spinel structure. 21 When the doping content of rare earth ions exceeds the solubility, some ions cannot enter the lattice but precipitate as secondary phase at the grain boundaries. The presence of impurities will inhibit the grain growth and hinder the motion of domain walls, although they are not detected by our XRD characterization.…”