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

The perovskite sample La 0.7 Sr 0.25 Na 0.05 Mn 0.7 Ti 0.3 O 3 (LSNM 0.70 T 0.30 ) was produced via a solid-state route process. The frequency dependence of electrical conduction plot established that according to the Jonscher law. The electrical conduction process was based on both theoretical cond...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2021-06, Vol.32 (12), p.16113-16125
Main Authors: Raddaoui, Z., El Kossi, S., Brahem, R., Bajahzar, A., Valentinovich Trukhanov, A., Leonidovich Kozlovskiy, A., Vladimirovich Zdorovets, M., Dhahri, Jemai, Belmabrouk, H.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Conduction model
Conductivity
Electric properties
Electrical conduction
Electrical resistivity
High temperature
Hopping conduction
Low temperature
Materials Science
Optical and Electronic Materials
Perovskites
Science
Spectrum analysis
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Summary:The perovskite sample La 0.7 Sr 0.25 Na 0.05 Mn 0.7 Ti 0.3 O 3 (LSNM 0.70 T 0.30 ) was produced via a solid-state route process. The frequency dependence of electrical conduction plot established that according to the Jonscher law. The electrical conduction process was based on both theoretical conduction models assigned to the non-overlapping small polaron tunneling model at low temperatures and correlated barrier hopping mechanism at high temperatures. Detailed investigation of impedance data revealed a non-Debye-type relaxation occurring in the polycrystalline. In addition, the dielectric response confirmed the dominance of the Maxwell–Wagner model and Koop’s phenomenological theory effect in conduction phenomenon. The values of permittivity is high for LSNM 0.70 T 0.30 were observed. These values make this composition interesting for microelectric applications. In the thermal study, the relaxation processes observed by electrical conductivity, impedance, and modulus are associated with singly and doubly ionized oxygen vacancies for the lower and higher temperature, respectively.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-06160-6