Dielectric relaxation and ionic conductivity studies of Ag2ZnP2O7

Abstract

The complex impedance of the Ag 2 ZnP 2 O 7 compound has been investigated in the temperature range 419-557 K and in the frequency range 200 Hz-5 MHz. The Z′ and Z′ versus frequency plots are well fitted to an equivalent circuit model. Dielectric data were analyzed using complex electrical modulus M* for the sample at various temperatures. The modulus plot can be characterized by full width at half-height or in terms of a non-exponential decay function f t ð Þ ¼ exp Àt=t ð Þ b . The frequency dependence of the conductivity is interpreted in terms of Jonscher's law: s w ð Þ ¼ s dc þ Aw n . The conductivity σ dc follows the Arrhenius relation. The near value of activation energies obtained from the analysis of M″, conductivity data, and equivalent circuit confirms that the transport is through ion hopping mechanism dominated by the motion of the Ag + ions in the structure of the investigated material.

Electrical conduction mechanism and transport properties of LiCrP2O7 compound

“…This behavior is in good agreement with the one obtained by Ben Rhaiem et al related to Ag 2 ZnP 2 O 7 material [17].…”

Preparation and characterization of organic–inorganic hybrid compound [N(C4H9)4]2Cu2Cl6

“…The onset of the conductivity relaxation phenomena has been indicated by change over from the angular frequency independent to the dependent region. The observed behavior is in general agreement with the prediction of the jump relaxation model [28][29][30][31][32][33].…”

Electrical and electrochemical studies on magnesium ion-based polymer gel electrolytes

“…The values of n basically represent the degree of interaction between the mobile ions and the environments surrounding them. For ionic conductors, this value lies between 0.5 and 1, indicating the ideal long range pathway diffusion of the ions and can be best explained by hopping models [45]. When the value of n00, the motion is completely random and the independent Debyelike ion hops.…”

“…It has been observed that the dc conductivity increases with temperature, which suggests that the free volume around the polymer chain causes the mobility of ions and polymer segments. The phenomenon of the conductivity dispersion is generally represented by Jonscher's law [45]. Mathematically, it can be written as σ(ω)0σ dc + Aω n where, σ dc is the dc conductivity of the sample, A is a constant for a particular temperature, and n is the frequency exponent lying in between the range of 0<n<1.…”