Magnetoelectrical characterization of mixed Ba-Sr ferrites

Results on structural, magnetic and electrical characterization of ferrimagnetic compounds of BaxSr1-xFe12O19 (x = 0.0, 0.25, 0.50, 0.75 and 1.0) prepared by the conventional ceramic method are reported. The composition dependence of saturation magnetization and coercitivity shows a maximum values at x = 0.5 and x = 0.25, respectively. The conductivity independent of frequency, obtained from direct calculation of impedance plots, exhibits an acceptable Arrhenius behavior. Temperature dependence of the total ne conductivity shows, at high and low temperatures, the de and ac components. It was observed an increase in conductivity as the Ba concentration increases. All associated activation energies and dielectric constant are also calculated.