Abstract
II-NaFeP2O7 was prepared by conventional ceramic fabrication technique. Rietveld refinement, impedance properties, conductivity dispersion, electric modulus, and their scaling were carried out as a function of frequency and temperature. Thus, X-ray diffraction analysis indicates that the sample exhibits a single-phase nature with a monoclinic structure. In addition, analysis of Nyquist plots as well as modulus analysis revealed the contribution of two electrically active regions corresponding to bulk mechanism and distribution of grain boundaries. The near values of activation energies, obtained from the impedance and modulus spectra, confirm that the transport happens through an ion hopping mechanism, dominated by the motion of the Na+ ions in the framework of the investigated material resulting from intersecting tunnels or voids where Na+ is located.
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