https://doi.org/10.1140/epjp/s13360-025-06212-4
Regular Article
Electrical conductivity and transport mechanisms in Bi-, Cu-, and W-doped BFN ceramic: a theoretical approach
1
Laboratoire de la Matière Condensée et des Nanosciences, Faculté des Sciences de Monastir, Université de Monastir, LR11ES40, 5019, Monastir, Tunisia
2
Department of Physics, College of Sciences and Humanities, Shaqra University, 19257, Al Quwayiyah, Saudi Arabia
3
Department of General Studies, Royal Commission for Jubail and Yanbu, Yanbu Industrial College, P.O. Box 30436, Yanbu, Kingdom of Saudi Arabia
a
maneleamara4@gmail.com
b
f_almutairi@su.edu.sa
Received:
11
December
2024
Accepted:
11
March
2025
Published online:
3
April
2025
The perovskite complex 0.985(BaFe0.5Nb0.5O3)-0.015(BiCu0.75W0.25O3) (0.985BFN-0.015BCW) was successfully prepared using the solid-state reaction technique. The X-ray diffraction patterns reveal that the prepared sample crystallizes in cubic symmetry. Our paper provides an insight into the electrical transport behavior of our compound. Indeed, different conduction models are applied to interpret the electrical conductivity response. It was observed that the transport properties are influenced by hopping mechanisms across different temperature ranges, which explains both the changes in DC conductivity and the movement of charge carriers with temperature variations. This confirms that the charge carriers undergo thermal activation. The variation of the exponent s as a function of temperature indicates the presence of Quantum Mechanical Tunneling (QMT), Correlated Barrier Hopping (CBH), Non-overlapping Small Polaron Tunneling (NSPT), and Overlapping Large Polaron Tunneling (OLPT) in the transport properties. At the temperature range [160–540 K], the AC conductivity is found to obey “double Jonscher power law.” Besides, the frequency dependence of the conductivity obeys “single Jonscher power law” at higher temperatures. Additionally, the conductivity spectrum shows a high-frequency plateau, which suggests percolation behavior.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
