Study of electrical properties of (Pr/Ca/Pb)MnO 3 ceramic
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Study of electrical properties of (Pr/Ca/Pb)MnO3 ceramic R. Hanen1 · A. Mleiki1,2 · H. Rahmouni1 · N. Guermazi3 · K. Khirouni4 · A. Cheikhrouhou2 Received: 7 July 2020 / Accepted: 11 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Characterization of the electrical properties of Pr0.65Ca0.25Pb0.1MnO3 ceramic, prepared by the solid-state method, is conducted using the impedance spectroscopy technique. Ac-conductivity measurements reveal the presence of two electrical behaviors. A semiconductor character obtained at low-temperature ranges of 80–160 K, and a metallic behavior found at high-temperature ranges of 180–400 K. The temperature dependence of the exponent s confirms the contribution of two conduction processes in the transport mechanism. In the range of T 140 K, the conduction process is governed by the correlated barrier hopping (CBH) model. Finally, beyond T = 250 K, the dc-conductivity is characterized by the appearance of a saturation region.
1 Introduction In the last decencies, manganese oxides have been extensively investigated in the scientific research field [1–3]. Such materials constitute a promising family of inorganic systems [4, 5]. Due to their unusual physical properties, manganites are used in enormous applications [6–8]. For examples, high electrical conductivity characteristic makes them functional for constructing solid oxide fuel cell (SOFC) [9, 10]. Owing to their important magnetocaloric effect and colossal magneto-resistance, manganites were explored in the magnetic cooling system, computer memory system, and magnetic sensors [11–14]. The physical properties of these systems can be improved by modifying several parameters, such as the nature of the dopant element, A-site deficiency, substitution sites, and preparation route [15–19]. In Ref [20], the * A. Mleiki [email protected] 1
Unité de Recherche Matériaux Avancés et Nanotechnologies (URMAN), Institut Supérieur des Sciences Appliquées et de Technologie de Kasserine, Kairouan University, BP 471, 1200 Kasserine, Tunisia
2
LT2S, Digital Research Center of Sfax, Sfax Technoparc, 3021 Sfax, Tunisia
3
Laboratoire Génie des Matériaux et Environnement (LGME), Ecole Nationale d’Ingénieurs de Sfax (ENIS), Université de Sfax, Sfax, Tunisia
4
Laboratoire de Physique des Matériaux et des Nanomatériaux appliquée à l’Environnement, Faculté des Sciences de Gabès cité Erriadh, Université de Gabès, 6079 Gabès, Tunisia
studies of the praseodymium manganite ( PrMnO3) have demonstrated an interesting magnetic against Neel temperature (TN). It exhibits antiferromagnetic insulator character at TN = 100 K and anisotropic behavior at TN
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