Abstract
Ferrite samples with chemical formula Mg xCu 0.5-xZn 0.5 Fe 2O4 (x = 0.0, 0.2 and 0.4) was prepared by the conventional ceramic method. The enhanced changes in the dc/ac resistivity and the dielectric constant due to γ-rays irradiation by 60 Co source were measured using the two probes technique. The samples showed decreasing of their resistivity at room temperature after irradiation for both dc and ac applied elect ric fields. Temperature dependence curves of the dc res istivity, before and after irradiation, showed thre e regions with different activation energies. It was also observed that the activation energy decreased after irradiation at every region. The frequency de pendence of ac resistivity and dielectric constant parameters were investigated before and after irrad iation process. Both real part ( e') and imaginary part (e'') of the dielectric constant were decreased due t o irradiation. These results were discussed in the view of gamma rays interaction with ferrite lattice .
Highlights
Ferrites have many important applications in ferrites are considered a promising material for Multilayer industry, modern telecommunication and electronic Current Inductors (MLCI) with high-performance and low devices and they are still of interest as promising cost
The present work reported the effect of irradiation on the electrical parameters as dc/ac resistivity, conduction activation energy and dielectric constant for the same samples
The real part of the dielectric constant (ε') was calculated using the formula ε' = Cpd/ε0A (Lipare et al, 2004) where Cp is the capacitance of the parallel plate, d is the thickness of the tablet, A is the cross-sectional area of the flat surfaces of the sample and ε0 is the permeability of free space (ε0 = 8.85×10-12 F/m)
Summary
Ferrites have many important applications in ferrites are considered a promising material for Multilayer industry, modern telecommunication and electronic Current Inductors (MLCI) with high-performance and low devices and they are still of interest as promising cost They are useful in the fabrication of cores materials for miniature electro-optic modulators, of Intermediate Frequency Transformers (IFT) for pyroelectric detectors, piezoelectric sensors, high quality amplitude modulation (Sujatha et al, 2011). The become important to industry because of their effect of γ irradiation on microstructure, diffusion applications in intermediate frequency transformer and coefficient of oxygen ions, dielectric properties, antenna cores These ferrites have magnetic thermoelectric power and thermal conductivity of Coproperties similar to those of Ni-Cu-Zn ferrites with the Zn ferrites was investigated The present work reported the effect of irradiation on the electrical parameters as dc/ac resistivity, conduction activation energy and dielectric constant for the same samples
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