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Structural and Dielectric Properties of La0.5Pr0.2Ba0.3Mn1−xTixO3 (x = 0.0 and 0.1) Manganite

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Abstract

In this work, we study the structural and dielectric properties of La0.5Pr0.3Ba0.2Mn1-xTixO3 (x = 0.0 and 0.1) samples prepared using the solid-state reaction technique. The X-ray structural analysis using Rietveld refinement method exhibits that both compounds are single phase and crystallize in the rhombohedral structure with R \({ }\overline{3}{ }\) C space group. In addition, a scanning electron microscopy (SEM) study proved an increase in the grain size with substitution of Mn by Ti in the B site. The dielectric properties of these compounds have been studied by complex impedance spectroscopy in the frequency range from 40 Hz to 1000 kHz and temperatures from 100 K to 200 K. The DC conductivity decreases with the substitution of Ti, and the experimental data were fitted by Jonscher’s universal power law. The impedance plot exhibits semicircle arcs at different temperatures. Similarly, the variations of imaginary parts of modulus and impedance show an electrical relaxation phenomenon with non-Debye nature for both samples. The values of the activation energy are determined from the conductivity data analysis and imaginary impedance.

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Authors and Affiliations

  1. Laboratory of Applied Physics, Faculty of Sciences of Sfax, University of Sfax, PB 1171, 3000, Sfax, Tunisia

    Rafik. Hamdi, I. Walha & E. Dhahri

  2. Research Unit of Valuation and Optimization of Resource, Faculty of Science and Technology of Sidi Bouzid, University Campus Agricultural City, University of Kairouan, 9100, SidiBouzid, Tunisia

    J. Khelifi

  3. Laboratoire de Physique Des Matériaux Et Des Nanomatériaux Appliquée À L’Environnement, Faculté Des Sciences de Gabes Cite Erriadh, Université de Gabes, Gabes, Tunisia

    W. Hzez

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Hamdi, R., Khelifi, J., Walha, I. et al. Structural and Dielectric Properties of La0.5Pr0.2Ba0.3Mn1−xTixO3 (x = 0.0 and 0.1) Manganite. J Low Temp Phys 203, 158–179 (2021). https://doi.org/10.1007/s10909-021-02565-z

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