Electrical properties, equivalent circuit, and dielectric relaxation studies on [(C3H7)4N]2Cd2Cl6 polycrystalline

The Ac electrical conductivity and the dielectric relaxation properties of the [(C3H7)(4)N](2)Cd2Cl6 polycrystalline sample have been investigated by means of impedance spectroscopy measurements over a wide range of frequencies and temperatures, 209 Hz-5 MHz and 361-418 K, respectively. The purpose is to make a difference between the electrical and dielectric properties of the polycrystalline sample and single crystal. Besides, a detailed analysis of the impedance spectrum suggests that the electrical properties of the material are strongly temperature-dependent. Plots of (Z" versus Z') are well fitted to an equivalent circuit model consisting of a series combination of grains and grains boundary elements. Moreover, the temperature dependence of the electrical conductivity in the different phases follows the Arrhenius law and the frequency dependence of sigma (omega) follows the Jonscher's universal dynamic law. Furthermore, the modulus plots can be characterized by full width at half height or in terms of a nonexperiential decay function phi(t) = exp(t/t)(beta). Finally, the imaginary part of the permittivity constant is analyzed with the Cole-Cole formalism.