Abstract
The LaFe1−xZrxO3 (x = 0.01, 0.05) ceramics were prepared by sol-gel and annealing method and studied by XRD, Raman scattering analysis, SEM, and impedance spectroscopy method. The crystal structure and phonon characteristics analysis revealed that the crystal structure tends to preserve its ideal orthorhombic structure, following the increase in driving force of the Fe/ZrO6 octahedral tilting. The frequency-dependent dielectric parameters at each temperature decreased with increasing Zr content. The temperature dependence dielectric relaxation and dc conduction mechanism satisfied the Arrhenius law and increased with increasing Zr content. The activation energy ranged from 0.30 to 0.50 eV and was similar in the relaxation and conduction mechanisms, indicating that both transport mechanisms were based on a similar mechanism.
Highlights
The interest in LaFeO3 among perovskite inorganic materials increased tremendously due to their applicability ranging as chemical sensors, electrode materials, etc. [1,2]
We found that the crystallite size decreases with increasing Zr content, indicating the decrease in crystallinity degree [10]
X-ray spectroscopy pattern of each ceramic, all of the elements’ (La, Fe, Zr, and O) peaks are presented in their respective molar concentrations during the annealing process, indicating the purity and phase formation of LaFe1−x Zrx O3 ceramics
Summary
The interest in LaFeO3 among perovskite inorganic materials increased tremendously due to their applicability ranging as chemical sensors, electrode materials, etc. [1,2]. In spite of the fact that there are numerous works committed to studying the physical properties in LaFeO3 containing valence cations as substituents [1,2,3,4,5,6,7], research investigations on the effect of. The question of the effect of Zr, as tetravalent cations occupying the Fe-site of LaFeO3 on the structural parameters and electrical transport mechanism, has not been systematically studied. This present work concentrates on the investigation of the effect of the Zr content on the structure and electrical properties of LaFeO3. The impedance spectroscopy was applied to get a better understanding of the electrical mechanism working on this material
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