Article (Scientific journals)
Investigation of the optical and dielectric properties of NaCu0.2Fe0.8-xMnxO2 (x = 0.4; 0.5; 0.6; 0.7) layered oxide materials
Ben Slima, Ichrak; Karoui, Karim; Khirouni, Kamel et al.
2023In Inorganic Chemistry Communications, 157, p. 111444
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Keywords :
Dielectric properties; NaCu0.2Fe0.8-xMnxO2 compounds; Optical properties; Semiconductor; Physical and Theoretical Chemistry; Inorganic Chemistry; Materials Chemistry
Abstract :
[en] NaCu0.2Fe0.8-xMnxO2 compounds were prepared by the solid state method. The structural analyses confirmed that the samples crystallize in hexagonal system with R-3 m space group. Fourier transform infrared spectroscopy shows vibrational modes of the compounds NaCu0.2Fe0.8-xMnxO2 and proves the presence of the octahedral environment MO6 (M = Cu, Fe, Mn) which is in good agreement with the structural study. The investigation by UV–visible spectroscopy revealed a strong absorption of the prepared samples in the UV–visible range and allowed extracting the band gap (2.8 eV < Eg < 3 eV) which shows a small increase with manganese content and exhibits the samples semiconductor behavior. Additionally, the study of the real part of the dielectric permittivity using impedance spectroscopy demonstrated a high dielectric constant at low frequency and suggested the existence of space charge polarization and dipolar polarization. However, the study of the imaginary part of the dielectric permittivity proved that the dipolar polarization may be masked due to the high ionic DC conductivity. Finally, modulus formalism indicated two relaxations attributed to the grain boundary and grain relaxations.
Disciplines :
Chemistry
Author, co-author :
Ben Slima, Ichrak;  Laboratory LaSCOM, University of Sfax, Sfax, Tunisia
Karoui, Karim;  Laboratory LaSCOM, University of Sfax, Sfax, Tunisia ; GREMAN, UMR 7347-CNRS, CEA, INSACVL, University of Tours, Blois, France
Khirouni, Kamel;  Laboratory of Physics of Materials and Nanomaterials applied to Environement, Faculty of Sciences of Gabès, University of Gabès, Tunisia
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Boschini, Frédéric ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Ben Rhaiem, Abdallah;  Laboratory LaSCOM, University of Sfax, Sfax, Tunisia
Language :
English
Title :
Investigation of the optical and dielectric properties of NaCu0.2Fe0.8-xMnxO2 (x = 0.4; 0.5; 0.6; 0.7) layered oxide materials
Publication date :
November 2023
Journal title :
Inorganic Chemistry Communications
ISSN :
1387-7003
Publisher :
Elsevier B.V.
Volume :
157
Pages :
111444
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 October 2023

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