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Phase transition and electrical investigation in lithium copper pyrophosphate compound Li2CuP2O7 using impedance spectroscopy

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Abstract

Lithium pyrophosphate compound Li2CuP2O7 has been synthesized through solid state reaction method. FTIR and XRD results, realized at room temperature, indicate respectively the dominant feature of pyrophosphate anion (P2O7)4− and a pure monoclinic phase with I2/a space group. Electrical and dielectric properties have been studied using impedance spectroscopy complex over a wide temperature (576–710 K) and frequency (209 Hz–1 MHz) range. From the direct and alternative conductivities (DC and AC), electrical conduction is found to be thermally activated process. The frequency-dependent AC conductivity obeys Jonscher’s universal power law σAC~Aωs. The differential scanning calorimetry spectrum discloses phase transition at 622 K.

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Authors and Affiliations

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

    Marwa Krichen, Mohamed Gargouri, Kamel Guidara & Makram Megdiche

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  1. Marwa Krichen
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  2. Mohamed Gargouri
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  3. Kamel Guidara
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  4. Makram Megdiche
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Correspondence to Marwa Krichen.

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Krichen, M., Gargouri, M., Guidara, K. et al. Phase transition and electrical investigation in lithium copper pyrophosphate compound Li2CuP2O7 using impedance spectroscopy. Ionics 23, 3309–3322 (2017). https://doi.org/10.1007/s11581-017-2161-3

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  • DOI: https://doi.org/10.1007/s11581-017-2161-3

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