Structural, AC conductivity, conduction mechanism and dielectric properties of La0.62Eu0.05Ba0.33Mn0.85Fe0.15O3 ceramic compound

Ncib, W.; Kharrat, A. Ben Jazia; Saadi, Meriem; Khirouni, K.; Chniba-Boudjada, N.; Boujelben, W.

doi:10.1007/s10854-019-02193-0

Cited by 18 publications

(8 citation statements)

References 52 publications

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“…It is observed that S tends to increase with increasing temperature. This behaviour is due to non-overlapping small polaron tunnelling [37,38]. This s variation as a function of temperature is consistent with a thermally triggered process.…”

Section: Fig 12: Cyclic Voltammogram (50 Mv/s) Of Nanocomposite (12) ...supporting

confidence: 78%

“…The total conductivity σ(ω) and the real part of complex conductivity in the low frequency regime () are equivalent when dc = Ao n , where the last relation gives the relationship between the dc and ac conductivity. In the intermediate plateau region, the conductivity is almost constant and frequency independent, which is called the dc conductivity σdc [37]. The increase of temperature increases the mobility (μ) and the density (n) of charge carriers and the dc conductivity is the product of the charge carrier density and their mobility according to the formula: (σdc = q nμ).…”

Section: Fig 12: Cyclic Voltammogram (50 Mv/s) Of Nanocomposite (12) ...mentioning

confidence: 99%

“…In particular, the dc conductivities found for the organic oligomer ( 8) and its composite (12) were comparable to many commercial inorganic or organic composites. For example, the reported dc conductivity of the known manganite compound La0.62Eu0.05Ba0.33Mn0.85Fe0.15O3 was 0.001 (s/cm) [37], while those of the vinyl chloride/vinyl acetate/graphene composite and polystyrene/graphene sheets composite were 0.01 (s/cm) and 1.0 (s/cm), respectively [39].…”

Section: Fig 12: Cyclic Voltammogram (50 Mv/s) Of Nanocomposite (12) ...mentioning

confidence: 99%

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Poly (aniline-co-aniline-2,5-disulfonic acid) / L-ascorbic acid / Ag@SiO2 / polysafranin nanocomposite: Synthesis, characterization and anomalous electrical behaviour

Hassan,

Fattah,

Maged

2024

Preprint

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It is well known that modification of polymer properties by incorporating organic dyes usually improves the conductivity; however, the oxidation of safranin dye itself or its blended material impairs the conductivity. In this paper, we report a new finding that the incorporation of the safranin dye with our recently reported sulfonated polyaniline/Ag@SO2 nanocomposite, prepared under modified conditions, achieved better conductivity after heating. The d.c conductivity of the organic oligomer itself varied from 0.06 to 0.016 (s/cm) and that of the composite from 0.008 to 0.016 (s/cm), respectively, with an increasing temperature of up to 363 K and then decreased at 393 K. The material changed from a semiconductor to a metallic nature, and their d.c conductivities were comparable to those of many commercial inorganic or organic composites. The frequency dependence of the permittivity, e¢, showed a remarkable effect on the frequency window under consideration. e¢ was independent of the increment in the frequency and this behaviour confirmed the presence of electrode polarization and space-charge effects. This result, on account of their attractive electrical properties we suggest, is promising for electronic field applications.

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Section: Fig 12: Cyclic Voltammogram (50 Mv/s) Of Nanocomposite (12) ...supporting

confidence: 78%

Section: Fig 12: Cyclic Voltammogram (50 Mv/s) Of Nanocomposite (12) ...mentioning

confidence: 99%

Section: Fig 12: Cyclic Voltammogram (50 Mv/s) Of Nanocomposite (12) ...mentioning

confidence: 99%

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Poly (aniline-co-aniline-2,5-disulfonic acid) / L-ascorbic acid / Ag@SiO2 / polysafranin nanocomposite: Synthesis, characterization and anomalous electrical behaviour

Hassan,

Fattah,

Maged

2024

Preprint

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“…This activation energy of FBI is also higher than all inorganic CsSnCl 3 or CsCuCl 3 perovskite, which ensures less noise in high external bias and better device stability [30,31]. The activation energies of FBI and MBI are greater than various oxide perovskites like Pr 0.8-x Bi x Sr 0.2 MnO 3 , La 0.62 Eu 0.05 Ba 0.33 Mn 0.85 Fe 0.15 O 3, and PrCrO 3 which make them more efficient in device applications [35][36][37]. Also, for The frequency-dependent dielectric characteristics may be described utilizing complex permittivity relations.…”

Section: Resultsmentioning

confidence: 99%

“…They showed that the parent material without Bi doping exhibited a metal to semiconductor transition at 250 K, but after Bi doping, the metallic nature is wholly suppressed. Later on, with the same synthesis technique, Ncib et al and Mguedla et al reported the dielectric and optical properties of La 0.62 Eu 0.05 Ba 0.33 Mn 0.85 Fe 0.15 O 3 and PrCrO 3, respectively [36,37]. But these two oxide perovskites showed semiconducting to metallic transition with increasing temperature.…”

Section: Introductionmentioning

confidence: 97%

Temperature-activated dielectric relaxation in lead-free halide perovskite single crystals

Paul¹,

Tailor²,

Mahapatra³

et al. 2022

J. Phys. D: Appl. Phys.

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Lead-free metal-halide perovskites have recently appeared as a promising candidate in optoelectronics and photovoltaics because of their non-toxicity, stability, and unique photophysical properties. Much scientific research has been done on optoelectronic characteristics and photovoltaic applications of lead-free perovskites, but the dielectric characteristics and insight into the relaxation phenomenon remain elusive. Here, we study the dielectric relaxation and conduction mechanism in the single crystalline (SC) A3Bi2X9 (A = MA+/FA+) perovskite using temperature-dependent electrochemical impedance spectroscopy in correlation with the modulus spectroscopy. With increasing temperature, the peak of −Z″(ω) shifts toward a high-frequency regime which specifies the thermally dependent relaxation mechanism in both crystals. The activation energy was estimated as 381 meV for MA3Bi2I9 (MBI) crystal and 410 meV for the FA3Bi2I9 (FBI) crystal suggesting hopping of mobile ions between lattice sites. The connected orientational polarization with the thermal motion of molecules leads to the enhancement in the dielectric constant (ϵ′) with temperature. The ϵ″(ω) in these crystals shows the significant ionic conductivity with a typical 1/fγ type characteristics (in the low-frequency regime) where γ is found to be in the range of 0.93–1.0 for MBI crystal and 0.88–0.98 for FBI crystal. The correlated imaginary part of impedance (−Z″) and modulus (M″) demonstrate the temperature-activated delocalized relaxation (non-Debye toward the Debye type) in these crystals. Stevels model suggests that the contribution of traps reduces with temperature rise and therefore conductivity enhances. Our study provides a comprehensive analysis and in-depth knowledge about the dielectric and conductivity relaxation mechanism in these lead-free perovskite SCs, which will help to implement efficient energy storage devices using these materials.

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Electrical conduction mechanism and dielectric properties of the [C13H16N2]5(BiCl6)3Cl hybrid compound

et al. 2023

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Structural, AC conductivity, conduction mechanism and dielectric properties of La0.62Eu0.05Ba0.33Mn0.85Fe0.15O3 ceramic compound

Cited by 18 publications

References 52 publications

Poly (aniline-co-aniline-2,5-disulfonic acid) / L-ascorbic acid / Ag@SiO2 / polysafranin nanocomposite: Synthesis, characterization and anomalous electrical behaviour

Poly (aniline-co-aniline-2,5-disulfonic acid) / L-ascorbic acid / Ag@SiO2 / polysafranin nanocomposite: Synthesis, characterization and anomalous electrical behaviour

Temperature-activated dielectric relaxation in lead-free halide perovskite single crystals

Electrical conduction mechanism and dielectric properties of the [C13H16N2]5(BiCl6)3Cl hybrid compound

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