Effect of annealing temperature on structural, morphology and dielectric properties of La0.75Ba0.25FeO3 perovskite

Abdallah, F. B.; Benali, A.; Triki, M.; Dhahri, E.; Graça, M.P.F.; Valente, M.A.

doi:10.1016/j.spmi.2018.03.048

Cited by 51 publications

(13 citation statements)

References 40 publications

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“…Satisfactory adjustments are achieved by means of an equivalent circuit formed by a parallel combination of a grain resistance ( R g ) and a fractal capacitance (CPE). The following relation 55 gives the CPE impedance ( Z CPE ): where Q is a proportional factor indicates the value of the capacitance, α is an empirical exponent with values between 0 and 1 indicating the change of the compressed semicircle from an ideal semicircle, and ω is the angular frequency.…”

Section: Resultsmentioning

confidence: 99%

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Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Section: Equivalent Circuitmentioning

confidence: 99%

Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles

et al. 2022

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“…Generally A and s are parameters depending on temperature and filler content. [37][38][39] The exponent s represents the degree of interaction between mobile ions with the lattices around them and A.determines the strength of polarizability. [38] Funke denounces the s parameter has a physical meaning.…”

Section: Ac Conductivity Studymentioning

confidence: 99%

“…[37][38][39] The exponent s represents the degree of interaction between mobile ions with the lattices around them and A.determines the strength of polarizability. [38] Funke denounces the s parameter has a physical meaning. [39] The charge carriers have a translation movement with brutal jumps when s < 1 and low jumps (localized jump) without leaving the neighborhood when s > 1.…”

Section: Ac Conductivity Studymentioning

confidence: 99%

Investigation into the dynamic molecular and conductivity mechanisms of piezoelectric ceramics Pb[Zr_xTi₁_−x]O₃/epoxy piezocomposites

et al. 2020

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Throughout this work, an experimental and theoretical analysis of the molecular dynamics, correlated with the alternating current conductivity σ ac (ω, T),of unidirectional piezoelectric composites used as actuators and/or sensors in different systems was carried out. The 3D-representation of the imaginary part M 00 (ω, T) of the electric modulus shows, apart from the presence of the classical secondary β and the primary α dipolar relaxation processes, the appearance of a new peak attributed to the Maxwell-Wagner-Sillars (MWS) interfacial polarization whose amplitude depends on the rate of reinforcement. In our case, since we are usually within the range of fragile materials, the stiffness of the 26% fiber content composite is about 4.5 times greater than that of 13.4% (via the fragility parameter D), shows a less pronounced curvature and the nature of the relaxation times is closer to the Arrhenius type. Due to the high dispersion of the conductivity with the frequency of applied electrical field in the range (1-10 4 Hz), Jonscher's "universal power law" has been revised by adding a new term, which takes into account the displacement current density. The ac conductivity adjustment procedure, using the new obtained expression, turns out to be accurate and follows the experimental data reported in the low, high, and even intermediate frequency domains. This theoretical approach allowed us to determine the key parameters (Δε, τ max ,…) unique to each relaxation process, and to demonstrate the MWS interfacial polarization that is directly linked to the adhesion between the PZT fibers and the epoxy resin matrix.

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“…However, manganite exhibits an important effect known as colossal magneto-resistance (CMR) closely related to its magnetic transition between a paramagnetic/insulating phase and ferromagnetic/metal phase [8][9][10]. The insulator-metal transition is due to the partial doped of the Rare Earth (RE) site by Alkaline Earth (AE) ions, causing the manganese ions to be trained in a combination of Mn 3+ / Mn 4+ ions.…”

Section: Introductionmentioning

confidence: 99%

Hopping conduction mechanism and impedance spectroscopy analyses of La0.70Sr0.25Na0.05Mn0.70Ti0.30O3 ceramic

Raddaoui

Kossi

Brahem

et al. 2021

J Mater Sci: Mater Electron

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The perovskite sample La0.7Sr0.25Na0.05Mn0.7Ti0.3O3 (LSNM0.70T0.30) was produced via a solidstate route process. Impedance spectra of LSNM0.70T0.30 in the frequency interval [40Hz -1MHz] were studied at several temperatures [80K to 440 K]. The ac conductivity (ac) established that according to the Jonscher law. ac is described by Non-overlapping Small Polaron Tunneling model at low temperatures and Correlated Barrier Hopping model at high temperatures. From dc conductance analysis, conduction seems to be thermally activated, suggesting the existence of semiconductor process. Detailed investigation of impedance data revealed the non-Debye nature of the relaxation processes in the sample. In addition, Dielectric constant curves were applied to examine the relaxation dynamics of charge carriers. In fact, the Debye-like relaxation was performed on the basis of the polarization of spatial charges following Maxwell-Wagner model and Koop's phenomenological theory.

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Effect of annealing temperature on structural, morphology and dielectric properties of La0.75Ba0.25FeO3 perovskite

Cited by 51 publications

References 40 publications

Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles

Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles

Investigation into the dynamic molecular and conductivity mechanisms of piezoelectric ceramics Pb[Zr_xTi₁_−x]O₃/epoxy piezocomposites

Hopping conduction mechanism and impedance spectroscopy analyses of La0.70Sr0.25Na0.05Mn0.70Ti0.30O3 ceramic

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Effect of annealing temperature on structural, morphology and dielectric properties of La0.75Ba0.25FeO3 perovskite

Cited by 51 publications

References 40 publications

Structural, morphological, and electrical properties of silver-substituted ZnAl2O4nanoparticles

Structural, morphological, and electrical properties of silver-substituted ZnAl2O4nanoparticles

Investigation into the dynamic molecular and conductivity mechanisms of piezoelectric ceramics Pb[ZrxTi1−x]O3/epoxy piezocomposites

Hopping conduction mechanism and impedance spectroscopy analyses of La0.70Sr0.25Na0.05Mn0.70Ti0.30O3 ceramic

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Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles

Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles

Investigation into the dynamic molecular and conductivity mechanisms of piezoelectric ceramics Pb[Zr_xTi₁_−x]O₃/epoxy piezocomposites