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Impedance spectroscopic analysis and electrical proprieties in SrAgNiMnO6 double perovskite ceramic

Iben Nassar, K. ; Slimi, M. ; Rammeh, N. ; Teixeira, S. Soreto ; Graça, M. P. F.

Journal of materials science. Materials in electronics, 2022-09, Vol.33 (25), p.20134-20143 [Periódico revisado por pares]

New York: Springer US

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  • Título:
    Impedance spectroscopic analysis and electrical proprieties in SrAgNiMnO6 double perovskite ceramic
  • Autor: Iben Nassar, K. ; Slimi, M. ; Rammeh, N. ; Teixeira, S. Soreto ; Graça, M. P. F.
  • Assuntos: Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Dielectric loss ; Dielectric properties ; Electrical resistivity ; Grain boundaries ; Grain size ; Materials Science ; Nyquist plots ; Optical and Electronic Materials ; Perovskites ; Room temperature ; Sol-gel processes ; Temperature
  • É parte de: Journal of materials science. Materials in electronics, 2022-09, Vol.33 (25), p.20134-20143
  • Descrição: In this paper, impedance spectroscopy, modulus analysis, AC electrical conductivity, and dielectric properties of double perovskite compound of general formula SrAgNiMnO 6 , synthesized by sol–gel method, have been reported in the temperature ranges (200–400 K) and frequency (1 kHz to 1 MHz). From the X-ray structural studies at room temperature, it is found that the material is single phase and their structure crystallizes in the rhombohedral system with the space group R 3 ¯ C . The morphology and grain size of the sample were observed using a scanning electron microscope (SEM), which clearly shows that the grains are uniformly distributed with few voids. By analyzing Nyquist diagrams, the existence of grain and grain boundary effects are established. The type of relaxation is non-Debye studied by the analysis of the complex impedance and modulus. We find that the resistances decrease with the increase in temperature indicating the semiconductor character of the material. The evolution of the AC conductivity with respect to the frequency obeys Joncher’s law. Besides, the activations energies obtained from the conductivity and the imaginary part of the impedance are very close. The study of frequency dependence of the dielectric loss indicates a phenomenon of relaxation in our material. From these results, it can be concluded that this compound can have very important electrical and dielectric properties for different temperatures and frequencies. It can therefore be used in technological applications, for example, in the electrical field knowing that capacitors.
  • Editor: New York: Springer US
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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