Transport properties of La0.9Sr0.1MnO3 manganite

Hizi, W.; Rahmouni, H.; Gassoumi, M.; Khirouni, K.; Dhahri, Sabrine

doi:10.1140/epjp/s13360-020-00492-8

Cited by 30 publications

(19 citation statements)

References 60 publications

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“…The inset of Fig. 2(a) depicts an example of adjustment of the data for the temperature 100 K. Similar results were found for La0.67-xEuxBa0.33Mn0.85Fe0.15O3 manganites [18], La0.9Sr0.1MnO3 ceramic [19].…”

Section: Ac Conductivity Studysupporting

confidence: 78%

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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Section: Ac Conductivity Studysupporting

confidence: 78%

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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show abstract

“…The dc conductance (G dc ) obeys the Arrhenius law [48]. The type of observed variation is reported to happen in disordered and polycrystalline materials [48][49][50][51][52][53][54].…”

Section: Electrical Propertiesmentioning

confidence: 89%

“…It can be observed that, in this temperature range, (i) s 1 decreases linearly with increasing temperature and (ii) s 1 < 1. This behavior indicates a sudden hopping, including translation motion, and, according to theoretical models [48][49][50][51][52][53][54], the nature of the activation is by the correlated barrier hopping (CBH) mechanism. According to the CBH mechanism, the correlation of s 1 with the temperature is [56,57]:…”

Section: Electrical Propertiesmentioning

confidence: 97%

“…The obtained s 1 values are presented in Figure 3d, for both doped and undoped samples. This parameter informs about the nature of the activated conduction process in the ac conductance regime [48][49][50]. It can be observed that, in this temperature range, (i) s 1 decreases linearly with increasing temperature and (ii) s 1 < 1.…”

Section: Electrical Propertiesmentioning

confidence: 97%

“…In manganite polycrystalline systems [48][49][50], the semiconductor behavior of the materials is correlated with the activation of a number of conduction processes, such as the small polaron hopping (SPH) and the variable range hopping mechanisms. In theoretical works [51][52][53][54], Mott assumes that the high temperature range of G dc must be investigated in terms of a thermally activated SPH model.…”

Section: Electrical Propertiesmentioning

confidence: 99%

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Influence of the Physical Properties on the Antibacterial and Photocatalytic Behavior of Ag-Doped Indium Sulfide Film Deposited by Spray Pyrolysis

et al. 2021

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Spray pyrolysis was used to deposit indium sulfide (In2S3) films, with or without silver doping. The films are polycrystalline, and the inclusion of Ag in the In2S3 structure leads to the formation of a solid solution, with the crystallite size of the order of tens of nanometers. In2S3 films exhibit a semiconductive behavior, and the incorporation of Ag leads to an increase of the charge carrier concentration, enhancing the electrical conductivity of the films. The small polaron hopping mechanism, deduced by the fittings according to the double Jonscher variation, explains the evolution of the direct current (dc) conductivity at high temperature of the Ag-doped indium sulfide. From impedance spectroscopy, it was found that the doped film presents dielectric relaxation, and Nyquist diagrams indicate the importance of the grain and the grain boundaries’ contributions to the transport phenomena. The physical characteristics of the films have an influence on the photocatalytic performance, achieving photodegradation efficiency above 80% (85.5% in the case of Ag doping), and on the antibacterial activity. The obtained results indicate that indium sulfide films are good candidates for environmental and biological applications, confirming a multifunctional nature.

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Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe₂O₄

Farshidfar,

Oreskovic,

Ryan

et al. 2023

Advanced Physics Research

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Electron transport via indirect exchange interactions between octahedral sites in spinels is affected by cationic or anionic vacancies. Thus, the deviation of the electron hopping mechanism is investigated, from a constant energy barrier toward a variable range energy barrier in iron‐deficient and oxygen‐deficient cubic magnesium ferrite spinels. Variable range electron hopping activation energy at high temperatures is consistent with the modified cation–anion interactions in the distorted structure of an ionic deficient cubic magnesium ferrite spinel. For these observations, an instrumental method is developed to evaluate the electron exchange interactions and general redox kinetics on surfaces, managed by exposure to the flow of a wide variety of desired gases. The applications of this instrument are far beyond the example studies reported here.

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Transport properties of La0.9Sr0.1MnO3 manganite

Cited by 30 publications

References 60 publications

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

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

Influence of the Physical Properties on the Antibacterial and Photocatalytic Behavior of Ag-Doped Indium Sulfide Film Deposited by Spray Pyrolysis

Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe₂O₄

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Transport properties of La0.9Sr0.1MnO3 manganite

Cited by 30 publications

References 60 publications

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

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

Influence of the Physical Properties on the Antibacterial and Photocatalytic Behavior of Ag-Doped Indium Sulfide Film Deposited by Spray Pyrolysis

Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe2O4

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Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe₂O₄