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Effect of the occupation of Ba and Ti sites on the structural, optical and dielectric properties of Sm-doped BaTiO3 ceramics

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Abstract

Sm-doped BaTiO3 powders have been synthesized with the help of the sol gel process. X-ray diffraction (XRD) patterns of the obtained powders, heat treated at a relatively low temperature (750 °C/3 h), revealed their crystallization in the pure perovskite structure without the presence of secondary phases. The occupation of the Ba and Ti sites by Sm in the BaTiO3 lattice and the evolution of the crystalline parameters as functions of the dopant content have been discussed based on XRD and Raman results. Dielectric measurements performed on the samples revealed a strong increasing diffuse character of the ferro-to-paraelectric phase transition with increasing Sm content. Moreover, the behavior of the permittivity as a function of frequency indicates that the samples are approaching their resonance frequency. The study of the conductivity showed the existence of a weak positive temperature coefficient of resistivity (PTCR) effect.

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Authors and Affiliations

  1. Laboratoire de Physique Théorique et Appliquée, FSDM, B.P. 1796, Fès, Morocco

    Fouad Es-saddik, Karoum Limame & Salaheddine Sayouri

  2. Centre Régional des Metiers de l’Education et de la Formation de Fès, BP 49, Fès, Morocco

    Karoum Limame

  3. LSSC, FST-Fès, Route d’Imouzzer, B.P. 2202, Fès, Morocco

    Taj-dine Lamcharfi

Authors
  1. Fouad Es-saddik
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  2. Karoum Limame
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  3. Salaheddine Sayouri
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  4. Taj-dine Lamcharfi
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Correspondence to Salaheddine Sayouri.

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Es-saddik, F., Limame, K., Sayouri, S. et al. Effect of the occupation of Ba and Ti sites on the structural, optical and dielectric properties of Sm-doped BaTiO3 ceramics. J Mater Sci: Mater Electron 30, 1821–1831 (2019). https://doi.org/10.1007/s10854-018-0454-6

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  • DOI: https://doi.org/10.1007/s10854-018-0454-6

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