Dielectric properties and A.C electrical conductivity analysis of (La₂O₃)_1-x(ZnO)_x

The A.C conductivity of three samples of lanthanide oxide : zinc oxide (La₂O₃)_1-x(ZnO)_x pellets with different zinc oxide content which were sintered 1273 K temperatures were studied using LRC meters in the frequency range of 50–10⁶ Hz at temperature of 30 °C. The a.c conductivity, was analyzed depending of the universal power law proposed by Jonsher,. The slope of the relation between logarithm of a.c conductivity and angular frequency represent the s value were in the range (0.44-0.77) which found to increase by increasing of zinc oxide content which coincided with the small polaron (SP) model. The dielectric constant ε₁ and dialectic loss ε₂ where found to show progressive increase by increasing of zinc oxide content. The a.c conductivity showed exponential dependence upon angular frequency for the samples with low zinc oxide content while the conductivity was frequency dependent in the low frequency range by was frequency independent in the high frequency range.