Elaboration, characterization, and giant dielectric permittivity in solid state synthesized Fe half-doped LaCrO3 perovskite

Boudad, L.; Taïbi, M.; Belayachi, A.; Abd‐Lefdil, M.

doi:10.1016/j.matpr.2022.01.253

Cited by 2 publications

(4 citation statements)

References 17 publications

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“…The dielectric constant increases with the increase in the test temperature, which is consistent with the results reported by Boudad et al [52] and Coşkun et al [53] on the dielectric properties of doped LaCrO3. The increased dielectric constant should be attributed to strong effects of the hopping of small polarons and carriers at the grain boundary, especially for the doping system [52,53]. The dielectric constant of the sample sintered at 1350 °C increases rapidly with the increase in the test temperature.…”

Section: Dielectric Propertiessupporting

confidence: 92%

“…With a further increase in frequency, the dipole oscillation induces polarization to stop and the partial spin polarization induced by the elemental solid solution produces the higher dielectric constant [49][50][51]. The dielectric constant increases with the increase in the test temperature, which is consistent with the results reported by Boudad et al [52] and Coşkun et al [53] on the dielectric properties of doped LaCrO3. The increased dielectric constant should be attributed to strong effects of the hopping of small polarons and carriers at the grain boundary, especially for the doping system [52,53].…”

Section: Dielectric Propertiessupporting

confidence: 85%

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Facile Preparation, Microstructure and Dielectric Properties of La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 Perovskite High-Entropy Ceramics

Tian

Zhang

et al. 2022

Crystals

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Preparation and properties of La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 high-entropy ceramics are investigated. La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 high-entropy ceramics are prepared by a traditional two-step solid-state reaction method in air. La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 single-phase powders are synthesized by calcining the mixed oxides at 1000 °C for 20 h. The high-entropy ceramics are sintered at 1350–1650 °C in a muffle furnace for 4 h by using the above powders. The phase compositions of the high-entropy ceramics at different temperatures are characterized by X-ray diffraction (XRD) with Cu Kα radiation. A field-emission scanning electron microscope with energy-dispersive spectroscopy (EDS) is used to observe the microstructures and analyze the elemental distributions. The hardness and dielectric properties are measured and discussed.

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Section: Dielectric Propertiessupporting

confidence: 92%

Section: Dielectric Propertiessupporting

confidence: 85%

Facile Preparation, Microstructure and Dielectric Properties of La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 Perovskite High-Entropy Ceramics

Tian

Zhang

et al. 2022

Crystals

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“…The small value of χ 2 indicated a good fittingness. The refined structural parameters at RT are tabulated in Table S1, matching well with the data reported previously [27,28]. The Goldschmidt's tolerance factor (t) of the LFCO powders was also calculated to be 0.961, indicating that an orthorhombic crystal structure was preferred for the present LFCO powder [29].…”

Section: Microstructural Characterizationsupporting

confidence: 81%

“…It is also noticed that any XRD peak representing the B-site cationic ordering does not appear in Figure 1, suggesting that the rock-salt type ordering of the Fe and Cr ions at B-sited sublattices is not realized due to their similar ionic radii and the The small value of χ 2 indicated a good fittingness. The refined structural parameters at RT are tabulated in Table S1, matching well with the data reported previously [27,28]. The Goldschmidt's tolerance factor (t) of the LFCO powders was also calculated to be 0.961, indicating that an orthorhombic crystal structure was preferred for the present LFCO powder [29].…”

Section: Microstructural Characterizationsupporting

confidence: 81%

Microstructural Characterization and Magnetic, Dielectric, and Transport Properties of Hydrothermal La2FeCrO6 Double Perovskites

Yi,

Wu,

Tang

et al. 2023

Nanomaterials

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Double perovskite La2FeCrO6 (LFCO) powders were synthesized via the hydrothermal method, which crystallized in an orthorhombic (Pnma) structure and exhibited a spherical morphology with an average particle size of 900 nm. Fourier transform infrared spectroscopy demonstrated the presence of fingerprints of vibrational modes of [FeO6] and [CrO6] octahedra in the powders. The XPS spectra revealed dual oxide states of Fe (Fe2+/Fe3+) and Cr (Cr3+/Cr4+) elements, and the oxygen element appeared as lattice oxygen and defect oxygen, respectively. The LFCO powders exhibited weak ferromagnetic behavior at 5 K with a Curie temperature of 200 K. Their saturation magnetization and coercive field were measured as 0.31 μB/f.u. and 8.0 kOe, respectively. The Griffiths phase was observed between 200 K and 223 K. A butterfly-like magnetoresistance (MR)–magnetic field (H) curve was observed in the LFCO ceramics at 5 K with an MR (5 K, 6 T) value of −4.07%. The temperature dependence of resistivity of the LFCO ceramics demonstrated their semiconducting nature. Electrical transport data were fitted by different conduction models. The dielectric behaviors of the LFCO ceramics exhibited a strong frequency dispersion, and a dielectric abnormality was observed around 260 K. That was ascribed to the jumping of electrons trapped at shallow levels created by oxygen vacancies. The dielectric loss showed relaxation behavior between 160 K and 260 K, which was attributed to the singly ionized oxygen vacancies.

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Elaboration, characterization, and giant dielectric permittivity in solid state synthesized Fe half-doped LaCrO3 perovskite

Cited by 2 publications

References 17 publications

Facile Preparation, Microstructure and Dielectric Properties of La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 Perovskite High-Entropy Ceramics

Facile Preparation, Microstructure and Dielectric Properties of La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 Perovskite High-Entropy Ceramics

Microstructural Characterization and Magnetic, Dielectric, and Transport Properties of Hydrothermal La2FeCrO6 Double Perovskites

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