Magnetoelectric effect and electrical properties in BTO+Ni0.93Co0.02Cu0.05Fe2O4 particulate composites

Studies on magnetic, dielectric and magnetoelectric behavior of (x) NiFe1.9Mn0.1O4 and (1−x) BaZr0.08Ti0.92O3 magnetoelectric composites

“…From this figure, the conductivity is observed to increase with an increase in frequency for all the composites. Linear variation of ac conductivity indicates that the conduction occurs by the hopping of charge carriers between localized states .The results are similar to the one observed by other workers [34,35]. For the present composites plots are linear confirming small polaron type of conduction.…”

Enhanced multiferroic properties in (1–y)BiFeO3–yNi0.50Cu0.05Zn0.45Fe2O4 composites

“…As the ferrite content increases beyond 20% mismatching between the grains increases due to the large difference in grain size of the two phases and hence α ME decreases. The values of α ME of the present composites are found to be higher than reported by other researchers [13,18,36,[52][53][54][55].These ME composites provide opportunities for potential applications as multifunctional devices such as microwave devices, sensors, magneticelectric transducers, gyrators, phase shifters, heterogeneous read/write devices and sensors.…”

First-Order Studies of Nanometric Biferroic

“…The contribution of the heterointerface in conduction mechanisms appears as a space charge interfacial polarization at the dissimilar grain boundaries. This mechanism is dominated at low frequencies and high temperatures, it depends on the distribution of the two phases with respect to each other and the volume fraction of each phase [19]. To determine the most dominant ac conduction mechanisms of the present nanocomposite, the dependence of σ ac on frequency at different temperatures is considered.…”

“…The variation of Seebeck coefficient (α) with temperature (T) is shown in Figure 10. The positive and negative values of Seebeck coefficient (α) indicate that, the majority of charge carriers are holes and electrons respectively [19]. It is observed that, the positive Seebeck coefficient corresponding to p-type conduction is due to Ni 2+ ↔ Ni 3+ and Ba 3+ ↔ Ba 2+ hole transition.…”