Dielectric behaviour of mixed MnZn ferrites

Dielectric relaxation behavior of AxCo1−xFe2O4 (A=Zn, Mg) mixed ferrites

“…Similar kind of behavior is also observed in case of Mn Zn ferrite [24]. The value of the loss tangent is minimum (∼0.04) for Co 0.5 Zn 0.5 Fe 2 O 4 and Co 0.5 Mg 0.5 Fe 2 O 4 measured at a frequency of 5 kHz at room temperature comparable with earlier measured value of Mn Zn ferrite [24,25]. Henceforth, Co 0.5 Zn 0.5 Fe 2 O 4 and Co 0.5 Mg 0.5 Fe 2 O 4 are suitable materials for microwave application because of low dielectric loss.…”

Influence of zinc substitution on magnetic and electrical properties of MgCuZn ferrite nanocrystalline powders prepared by sol–gel, auto-combustion method

“…The decrease of dielectric constant with increase of frequency as observed in the case of mixed MgZn ferrites is a normal dielectric behavior of spinel ferrites [24]. The normal dielectric behavior was also observed by several investigators in the case of NiZn [25], LiCd [26], LiTiZn [27] and MnZn [28] ferrites. It can be seen from the figure that the dispersion in ε is analogous to Maxwell-Wagner interfacial polarization [29,30], in agreement with Koops phenomenological theory [31].…”

Effect of nickel on the electrical properties of nanostructured MnZn ferrite

“…The dielectric constant for all the samples is lower than the corresponding bulk value at room temperature. Latha et al [13] have reported a dielectric constant of (17-32) × 10 5 at 308 K measured at a frequency of 5 kHz for Mn-Zn ferrite in bulk form synthesized by ceramic method. In the present investigation a dielectric constant of 840 is obtained, which is measured at a frequency of 5 kHz at 300 K. This low value of dielectric constant is attributed to homogeneity, better symmetry, uniform and smaller grains [14].…”