Abstract
The electric properties and magnetoelectric effect in magnetoelectric (ME) composites with composition(x)Ni0.2Co0.8Fe2O4 + (1 − x)PbZr0.8Ti0.2O3 (PZT—lead zirconate titanate) were studied. The presence of single- (x = 0 and 1) andbi-phases (x = 0.15, 0.30 and 0.45) in the composites was confirmed by x-ray diffraction (XRD)measurements. A structural analysis of the composites was carried out by scanning electronmicroscopy (SEM) measurements. Electric resistivity measurement as a function oftemperature shows the semiconducting nature of the samples. The dielectric constant (ε′) and losstangent (tanδ) decrease rapidly at lower frequencies and remain constant at higher frequenciesfor all the samples. An AC conductivity measurement was used to discussthe conduction mechanism in all the samples. The ME voltage coefficient(dE/dH)H measured as a function of DC magnetic field gives the maximum ME output of 778 µV cm−1 Oe−1 for 15% of ferrite in the composites.
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