Abstract
Maghemite (γ-Fe2O3) and Mg-doped γ-Fe2O3 nanopowders were made using the sol–gel method. The microstructural properties of the generated samples were evaluated using X-ray diffraction (XRD). The indexed reflection peaks were validated to indicate crystallinity of the generated material, which has a cubic structure that matches the reticular planes of γ-Fe2O3 and crystallite sizes ranging from 10 to 16 nm. The electrical investigation was carried out using impedance spectroscopy. Electrical conductivity is a strong supporter of Jonscher's law. As a result, the charge carrier displacement coincides with the pattern of correlated barrier jumps across the dispersive zone generated by interstitial defects and vacancies. The Nyquist graphs show three different models. A sequence of two R-CPE combination circuits is used in the first model for γ-Fe2O3. The second is for γ-Fe2O3-Mg1% and γ-Fe2O3-Mg3% a series of three R-CPE combination circuits. A sequence of two R-CPE combination circuits and one R circuit is the last example for γ-Fe2O3-Mg5%. The polarization effect and a tiny dielectric loss were shown to be connected to dielectric behavior. Furthermore, the occurrence of the space-charge polarization phenomenon, which is ascribed to ion mobility, was used to explain the dielectric constant.
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02 November 2022
A Correction to this paper has been published: https://doi.org/10.1007/s00339-022-06113-8
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Benamara, M., Bouzidi, S., Zahmouli, N. et al. Electrical transport of Mg-doped maghemite (γ-Fe2O3) nanoparticles. Appl. Phys. A 128, 624 (2022). https://doi.org/10.1007/s00339-022-05753-0
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DOI: https://doi.org/10.1007/s00339-022-05753-0