Abstract
Electrical properties of the NaCuFe2(VO4)3 compound were studied using complex impedance spectroscopy in the frequency range 300 Hz–5 MHz and temperature range (523–673 K). Both impedance and modulus analysis exhibit the grain and grain boundary contribution to the electrical response of the sample. The temperature dependence of the bulk and grain boundary conductivity were found to obey the Arrhenius law with activation energies Edcg = 0.87 eV and Edcgb = 0.85 eV, respectively. The transport properties, such as hopping frequency (ωh), effective attempt frequency (ω0), and migration entropy (Sm/K), have been calculated using the Almond and West formalisms.
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