Characterization of the structure and conduction behavior of overlapping polaron tunnel of dipotassium zinc orthogermanate

In this work, we are focused to study the structural, vibrational and electrical properties of K2ZnGeO4 ceramic compound. The KZGO was prepared by conventional solid-state method. X-ray diffraction (XRD) analysis reveals that the sample is well crystallized in the orthorhombic structure with Pca21 space group. Moreover, IR spectrum for this compound confirm the presence of group functionally [GeO4]4-. The electrical measurements was studied in the 40 Hz-1 MHz frequency interval and 533-653 K temperature range. AC conductivity of K2ZnGeO4 is showed on the basis of the overlapping large polaron tunneling (OLPT) model. The activation energy calculated from both the DC conductivity and modulus spectra are close quite to notify that the electrical conductivity and the relaxation process are attributed to the same effect. Thermodynamic parameters for instance the enthalpy.H, and the change in entropy.S and the free energy of activation.F have been determined. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

This work focuses on the structural, vibrational, and electrical properties of K2ZnGeO4 ceramic compound, revealing a well crystallized orthorhombic structure with specific functional group. The electrical measurements indicate that the conductivity and relaxation process are influenced by the same factor.