Effect of iron doping at Mn-site on complex impedance spectroscopy properties of Nd0.67Ba0.33MnO3 perovskite

Hsini, Mohamed; Hamdaoui, Nejeh; Hcini, Sobhi; Bouazizi, Mohamed Lamjed; Zemni, S.; Béji, Lotfi

doi:10.1080/01411594.2017.1382701

Cited by 19 publications

(5 citation statements)

References 38 publications

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“…It can be seen from the fitted result presented in Table 2 that the achieved n values are all superior than 1 for the whole temperature range. This behavior indicates that there are hops between neighboring sites [11]. Then, the obtained gel was calcined at 500 K for 8 h to eliminate the organic material.…”

Section: Electrical Conductivity Measurementmentioning

confidence: 99%

Study of the Dielectric Behavior as a Function of the Frequency at Different Temperatures on the Sample Pr0.525Y0.075Ca0.1Sr0.3Mn0.975Fe0.025O3

Baazaoui¹,

Moulahi²,

Hamdaoui³

et al. 2021

Int J At Nucl Phys

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Structural and dielectric properties of Pr 0.525 Y 0.075 Ca 0.1 Sr 0.3 Mn 0.975 Fe 0.025 O 3 manganite system are investigated. The XRD analysis confirms that all compounds crystallized in a rhombohedral structure ( 3R c space group). Using complex impedance spectroscopy, we confirm that our sample proves a semiconductor behavior which is governed by the increase of the conductance as function of temperature. From the complex impedance spectra, we conclude that the electrical mechanism for each temperature indicate a non-Debye type relaxation behavior. The achieved activation energy is found to be E a = 0.117 ev. Indeed, we proved that the abrupt decrease of dielectric lost a δ with frequency is related to the decrease of the grain resistance at high frequencies.

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Section: Electrical Conductivity Measurementmentioning

confidence: 99%

Study of the Dielectric Behavior as a Function of the Frequency at Different Temperatures on the Sample Pr0.525Y0.075Ca0.1Sr0.3Mn0.975Fe0.025O3

Baazaoui¹,

Moulahi²,

Hamdaoui³

et al. 2021

Int J At Nucl Phys

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“…Thus, the decrease in the permittivity is related to the conductivity increase that is induced by the rise in the number of charge carriers hopping. Such behavior underscores the strong correlation between the conduction and the dielectric permittivity [ 4 , 65 , 66 , 67 ]. This can be theoretically confirmed by the relations between the real and imaginary parts of the permittivity, the dielectric loss tangent (tgδ) with the electrical conductivity and the angular frequency (ω), as is shown in the following equations [ 4 , 10 , 66 ]:

…”

Section: Resultsmentioning

confidence: 99%

Effect of Sintering Temperature and Polarization on the Dielectric and Electrical Properties of La0.9Sr0.1MnO3 Manganite in Alternating Current

et al. 2022

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The electrical characterization ofa La0.9Sr0.1MnO3 compound sintered at 800, 1000 and 1200 °C was investigated by means of the impedance-spectroscopy technique. As the results, the experimental conductivity spectra were explained in terms of the power law. The AC-conductivity study reveals the contributions of different conduction mechanisms. Indeed, the variation in the frequency exponents (‘s1’ and ‘s2’) as a function of the temperature confirms the thermal activation of the conduction process in the system. It proves, equally, that the transport properties are governed by the non-small-polaron-tunneling and the correlated-barrier-hopping mechanisms. Moreover, the values of the frequency exponents increase under the sintering-temperature (TS) effect. Such an evolution may be explained energetically. The jump relaxation model was used to explain the electrical conductivity in the dispersive region, as well as the frequency-exponent values by ionic conductivity. Under electrical polarization with applied DC biases of Vp = 0.1 and 2 V at room temperature, the results show the significant enhancement of the electrical conductivity. In addition, the dielectric study reveals the evident presence of dielectric relaxation. Under the sintering-temperature effect, the dielectric constant increases enormously. Indeed, the temperature dependence of the dielectric constant is well fitted by the modified Curie–Weiss law. Thus, the deduced values of the parameter (γ) confirm the relaxor character and prove the diffuse phase transition of our material. Of note is the high dielectric-permittivity magnitude, which indicates that the material is promising for microelectronic devices.

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“…5a presents the variation of imaginary part of permittivity (ε'') with frequency and temperature. The values of ε" were calculated from the conductivity data using the following relation [31]:…”

Section: Dielectric Studymentioning

confidence: 99%

Synthesis and study of impendence spectroscopy properties of La0.6Ca0.2Na0.2MnO3 manganite perovskite prepared using sol–gel method

Alresheedi

Hcini

Bouazizi

et al. 2020

J Mater Sci: Mater Electron

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La0.6Ca0.2Na0.2MnO3 manganite was prepared using sol-gel method. Rietveld refinement of XRD pattern indicates that the prepared sample crystallizes in the rhombohedral 𝑅3𝑐 structure. The impendence spectroscopy properties of the sample were studied by performing a series of measurements as a function of temperature and frequency of conductivity, dielectric constants, modulus and impedance. From these measurements, the metal-semiconductor behaviour was observed for the sample at a transition temperature of the order of 240 K. The studies of imaginary part of permittivity and tangent loss reveal that the prepared material may be a good candidate for low-frequency energy storage devices. An electrical relaxation phenomenon with non-Debye nature was observed in variations of imaginary parts of modulus and impedance. Electrical parameters deduced from the Nyquist plots analyses using an equivalent circuit reveal that the conduction process for the sample was caused due to the grain boundaries contribution.

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Effect of iron doping at Mn-site on complex impedance spectroscopy properties of Nd_0.67Ba_0.33MnO₃ perovskite

Cited by 19 publications

References 38 publications

Study of the Dielectric Behavior as a Function of the Frequency at Different Temperatures on the Sample Pr0.525Y0.075Ca0.1Sr0.3Mn0.975Fe0.025O3

Study of the Dielectric Behavior as a Function of the Frequency at Different Temperatures on the Sample Pr0.525Y0.075Ca0.1Sr0.3Mn0.975Fe0.025O3

Effect of Sintering Temperature and Polarization on the Dielectric and Electrical Properties of La0.9Sr0.1MnO3 Manganite in Alternating Current

Synthesis and study of impendence spectroscopy properties of La0.6Ca0.2Na0.2MnO3 manganite perovskite prepared using sol–gel method

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