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Vibrational analysis and AC electrical conduction behavior of lithium zinc orthogermanate

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Abstract

The lithium zinc orthogermanate, Li2ZnGeO4, was synthesized by the solid-state reaction and characterized by X-ray diffraction (XRD) and electrical technique. Li2ZnGeO4 is of monoclinic symmetry with the space group P n. The unit cell parameters are as follows: a = 6.368(2)Å, b = 5.438(2)Å, c = 5.034(1)Å, β = 90.191(0)°, and V=174.360(1)Å3. The electrical measurements were carried out by impedance spectroscopy in the temperature and frequency range (553–653)K and (40 Hz to 1 MHz), respectively. The AC conductivity was interpreted using Jonscher’s law. s parameter decreases while the temperature increases indicating that the CBH model is the most reasonable mechanism of AC conduction behavior. Thermodynamic parameters such as the enthalpy ΔH and the change in entropy ΔS have been calculated. The negative value of ΔS may be due to the existence of dipole-dipole interactions and suggests that the molecules are more nearly aligned with each other in the activated state.

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  1. Laboratory of Spectroscopic Characterisation and Optics of Materials, Faculty of Sciences, University of Sfax, B. P. 1171, 3000, Sfax, Tunisia

    Sourour Ben yahya & Bassem Louati

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  1. Sourour Ben yahya
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  2. Bassem Louati
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Ben yahya, S., Louati, B. Vibrational analysis and AC electrical conduction behavior of lithium zinc orthogermanate. Ionics 27, 3027–3034 (2021). https://doi.org/10.1007/s11581-021-04061-6

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