The effect on dielectric losses in lithium ferrite by cerium substitution

Order–Disorder Phase Transition and Magneto‐Dielectric Properties of (1−x)LiFe5O8–xLi2ZnTi3O8 Spinel‐Structured Solid Solution Ceramics

“…(b), the atom ratio of Fe, Ti, and Zn are consistent with the stoichiometric ratio of corresponding components of the solid solution (1− x )LiFe 5 O 8 – x Li 2 ZnTi 3 O 8 system. It is seen that the grain size of (1− x )LiFe 5 O 8 – x Li 2 ZnTi 3 O 8 ceramics continuously increased from 1 to 2 μm for the x = 0 sample to about 5–10 μm for the x = 1 sample, because the sintering temperature of 1050°C is close to the reported sintering temperature of Li 2 ZnTi 3 O 8 ceramic (1075°C/4 h with grain size about 20–50 μm) but lower than that of LiFe 5 O 8 ceramic (1150°C/10 h with grain size about 5–10 μm) …”

“…In the ordered phase, the Li + and Fe 3+ ions occupy the octahedral sites at a ratio of 1:3, whereas these ions are distributed randomly in the disordered phase . The α‐LiFe 5 O 8 has a primitive cubic unit cell with a = 8.33 Å, and possesses high initial permeability (μ′ = 34 at 10 MHz) and relatively low dielectric loss tangent (tanδ = 0.1 at 10 MHz) . The B‐site disordered β‐LiFe 5 O 8 has a larger unit cell ( a = 8.3409 Å), however, the details of the magneto‐dielectric properties have not been reported yet because it is hardly synthesized for property measurement.…”

Synthesis and characterization of nano-sized pure and Al-doped lithium ferrite having high value of dielectric constant

“…This behaviour can be explained on the basis of Neel's two sublattice models [35]. It is well known that lithium ferrite is an inverse spinel with Li 1+ and Fe 3+ ions occupying the octahedral (B) sites in the ratio of 1: 3 4 . The magnetic moment in inverse ferrites is mainly due to the resultant magnetic moment of the A-site and B-site.…”

“…Ferrites assume special significance in the field of electronics and telecommunication industry because of their novel electrical properties which makes them useful in radiofrequency circuits, high quality filters, rod antennas, transformer cores, read/write heads for high digital tapes and other devices [2,3]. Hence it is important to study their dielectric behaviour at different frequencies.…”

Influence of pH on structural morphology and magnetic properties of ordered phase cobalt doped lithium ferrites nanoparticles synthesized by sol–gel method

“…In early days, the microwave devices were based on garnet since the garnets have all iron ions in the trivalent state which results high resistivity, low dielectric loss and resonance line width. But the low Curie temperature, high stress sensitivity and high costs associated with garnets have compelled us to search for another option [2,3]. In comparison to other ferrite materials, the ithium-based ferrite has great importance due to the fact that the Li ions enter the lattice in combination of Fe 3+ ions and this results a lower concentration of Fe 2+ ions, which make the material resistivity very high.…”