Structural, dielectric behavior, diffuse phase transition, and electrical properties of 0.7(Bi1−xSmx) FeO3–0.3BaTiO3 ceramics (x = 0.1 and 0.2)
4 affiliations
- 1Laboratory for Spectroscopic and Optical Characterization of Materials (LASCOM), Faculty of Sciences, University of Sfax B. P. 1171 3000 Sfax Tunisia
- 2Laboratory of Multifunctional Materials and Applications (LaMMA), LR16ES18, Faculty of Sciences of Sfax, University of Sfax BP 1171 3000 Sfax Tunisia
- 3Department of Physics, Al-Qunfudah University College, Umm Al-Qura University Mecca Saudi Arabia
- 4Department of Physics, Faculty of Science, Elmergib University Tunisia
Abstract
Environmentally friendly 0.7(Bi1−xSmx)FeO3–0.3BaTiO3 systems with various doping rates with x = 0.1 and 0.2, have been synthesized by the solid-state method, and their structural, microstructural, vibrational, and electrical properties were systematically investigated. X-ray diffraction combined with Rietveld refinement confirmed the stabilization of a single-phase perovskite structure, with lattice contraction attributed to Sm3+ substitution. The BFBT-0.1Sm composition crystallizes in a tetragonal phase with P4/mmm symmetry, whereas the BFBT-0.2Sm sample adopts an orthorhombic structure belonging to the Pmmm space group. This structural evolution is consistently supported by both XRD patterns and Raman spectral analysis. SEM analysis revealed dense microstructures with well-distributed grains. Energy-dispersive X-ray spectroscopy (EDX) confirmed the presence of all the chemical elements constituting the materials. Raman spectroscopy provided evidence of local structural distortion. Dielectric measurements showed a significant increase in permittivity, while impedance and AC conductivity analyses indicated a thermally activated hopping mechanism consistent with Jonscher's power law. The dielectric constant varies with temperature, indicating the occurrence of a diffuse phase transition. This behavior was further analyzed using the modified Curie–Weiss law. A thorough analysis of the dielectric properties as a function of temperature demonstrates a characteristic ferroelectric to paraelectric (FE–PE) transition, marked by a significant rise in the real part of permittivity near 600–700 K for both compounds. This substantial permittivity underscores their potential for energy storage applications. These findings suggest that the studied ceramics are promising candidates for multifunctional devices.
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BibTeX
@article{aydi2026structural,
title = {{Structural, dielectric behavior, diffuse phase transition, and electrical properties of 0.7(Bi1−xSmx) FeO3–0.3BaTiO3 ceramics (x = 0.1 and 0.2)}},
author = {Samia Aydi and Mohamed Mounir Bouzayani and Houda Slimi and Wael Z. El-sayad and Rima Mohammed Altalib and Abderrazek Oueslati and Abdelhedi Aydi},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra06239c},
url = {https://europepmc.org/article/PMC/PMC13673523},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Structural, dielectric behavior, diffuse phase transition, and electrical properties of 0.7(Bi1−xSmx) FeO3–0.3BaTiO3 ceramics (x = 0.1 and 0.2)
AU - Samia Aydi
AU - Mohamed Mounir Bouzayani
AU - Houda Slimi
AU - Wael Z. El-sayad
AU - Rima Mohammed Altalib
AU - Abderrazek Oueslati
AU - Abdelhedi Aydi
PY - 2026
DA - 2026/10/16
JO - RSC advances
DO - 10.1039/d6ra06239c
UR - https://europepmc.org/article/PMC/PMC13673523
AB - Environmentally friendly 0.7(Bi1−xSmx)FeO3–0.3BaTiO3 systems with various doping rates with x = 0.1 and 0.2, have been synthesized by the solid-state method, and their structural, microstructural, vibrational, and electrical properties were systematically investigated. X-ray diffraction combined with Rietveld refinement confirmed the stabilization of a single-phase perovskite structure, with lattice contraction attributed to Sm3+ substitution. The BFBT-0.1Sm composition crystallizes in a tetragonal phase with P4/mmm symmetry, whereas the BFBT-0.2Sm sample adopts an orthorhombic structure belonging to the Pmmm space group. This structural evolution is consistently supported by both XRD patterns and Raman spectral analysis. SEM analysis revealed dense microstructures with well-distributed grains. Energy-dispersive X-ray spectroscopy (EDX) confirmed the presence of all the chemical elements constituting the materials. Raman spectroscopy provided evidence of local structural distortion. Dielectric measurements showed a significant increase in permittivity, while impedance and AC conductivity analyses indicated a thermally activated hopping mechanism consistent with Jonscher's power law. The dielectric constant varies with temperature, indicating the occurrence of a diffuse phase transition. This behavior was further analyzed using the modified Curie–Weiss law. A thorough analysis of the dielectric properties as a function of temperature demonstrates a characteristic ferroelectric to paraelectric (FE–PE) transition, marked by a significant rise in the real part of permittivity near 600–700 K for both compounds. This substantial permittivity underscores their potential for energy storage applications. These findings suggest that the studied ceramics are promising candidates for multifunctional devices.
SN - 2046-2069
ER -