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Colossal dielectric constant with enhanced magnetization in the La3+ and Ca2+ co-doped BiFeO3 nanoparticles

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Abstract

The present paper explores of the lanthanum and calcium insertion effect on the physico-chemical properties of the Bi0.8(La0.8Ca0.2)0.2FeO3 (LCBFO-8) Sol–Gel made multiferroic compound. The LCBFO-8 compound crystallized in a rhombohedral distorted structure with the R3c space group. The Morphological investigation confirmed the nanosize criteria of the examined nanoparticles with an average particle size less than 50 nm. Notably, the studied compound shows a colossal dielectric constant, low loss tangent tg(delta) values, an enhanced magnetization, and a reduction of the Curie transition temperature to 395 K, which confirms well the high utility of such compound for energy storage applications. At low and high temperatures, two dielectric relaxations have been detected in the frequency dependence curves of the dielectric constant and the Modulus imaginary part plots at low and high-temperature ranges. The symmetric and asymmetric dielectric parameters α and β have been collected from the adjustment of the M″ based on the Havriliak–Negami (H–N) formalism. According to their values, it can be concluded that the high-temperature relaxation is a Cole–Cole-type dielectric relaxation, while the Cole–Davidson model fits the high temperature well.

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Acknowledgements

Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2022R184), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia. Authors would like as well to acknowledge the financial support from FCT – Fundação para a Ciência e a Tecnologia, I.P., within the projects No. UID/04564/2020 and UID/CTM/50025/2013 I3N. Access to TAIL-UC facility funded under QREN-Mais Centro Project No. ICT_2009_02_012_1890 is gratefully acknowledged.

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Authors and Affiliations

  1. Laboratoire de Physique Appliquée, Faculté des Sciences, Université de Sfax, B.P. 1171, 3000, Sfax, Tunisia

    A. Benali, E. M. Benali & E. Dhahri

  2. CFisUC, Physics Department, University of Coimbra, Rua Larga, 3004-516, Coimbra, Portugal

    A. Benali, E. M. Benali & B. F. O. Costa

  3. I3N, Physics Department, University of Aveiro, Campus de Santiago, Aveiro, Portugal

    A. Benali, M. P. F. Graça & M. A. Valente

  4. Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia

    Soumaya Gouadria

  5. Department of physics, College of Science and Humanities - Dawadmi, Shaqra University, Riyadh, Saudi Arabia

    M. Elhadi

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Contributions

AB: Investigation Conceptualization Writing, Formal analysis, Original Draft Validation. EMB: Investigation Conceptualization Writing, Formal analysis, Original Draft Validation. SG: Conceptualization, Formal analysis, Writing – review & editing. ME: Conceptualization, Formal analysis, Writing – review & editing. ED: Validation Writing, Review and editing. MPFG: Validation Writing, Review and editing. MAV: Validation Writing, Review and editing. BFOC: Validation Writing, Review and editing.

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Benali, A., Benali, E.M., Gouadria, S. et al. Colossal dielectric constant with enhanced magnetization in the La3+ and Ca2+ co-doped BiFeO3 nanoparticles. J Mater Sci: Mater Electron 33, 16236–16250 (2022). https://doi.org/10.1007/s10854-022-08517-x

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