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Influence of La3+ substitution on the structural, magnetic and electrical characteristics of Sr2FeTiO6 double perovskites

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Abstract

In this study, the La3+ ions are substituted at the Sr2+ site in Sr2FeTiO6 double perovskites using the solid state reaction method. The impact of La3+ion substitution on the Sr2FeTiO6 physical characteristics have been studied. The SrTiO3 structural parameters were utilised as starting model for performing the Rietveld refinement of powder X-ray diffraction patterns. Cubic symmetry with Pm3m space group was determined for the prepared materials. Due to the larger ionic radii of La3+ ion, the La substituted samples showed slight increase in the lattice cell parameters leading to volume expansion. The La-substituted samples don’t exhibit any significant morphological differences when compared to parent compound. The diffused reflectance measurements also show no significant changes in the band gap values of La-substituted samples in comparison with the pure compound. The magnetization studies exhibit the enhanced ferromagnetic nature of La-substituted sample. Thermally activated charge carriers are also evident from the analysis of temperature dependent dielectric measurements.

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Acknowledgements

The Authors thank and acknowledge Nanotechnology Research Centre (NRC), SRMIST for providing characterization facilities such as XPS, XRD UV-DRS and VSM.

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No funding was received to assist with the preparation of this manuscript.

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Authors and Affiliations

  1. Department of Physics, SRM Institute of Science & Technology, Ramapuram Campus, Chennai, 600 089, Tamil Nadu, India

    J. Stella Punitha & A. Nataraj

  2. Department of Physics (Unaided), PSG College of Arts & Science, Coimbatore, Tamil Nadu, 641 014, India

    V. Anbarasu

  3. Microwave Tube Research Centre, Defence Research and Development Organisation, Bengaluru, Karnataka, 560 013, India

    M. Dhilip

  4. Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Republic of Singapore

    M. Manikandan

  5. Department of Physics, Sri S. Ramasamy Naidu Memorial College, Sattur, Tamil Nadu, 626 203, India

    K. Saravana Kumar

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Contributions

JSP: Conceptualization of work, experimental work and discussion of data, creation of initial draft of the article, AN: Supervision of the work carried out for the article, discussion of obtained experimental data, VA: Discussion of obtained experimental data, MD: Discussion of obtained experimental data, MM: Discussion of obtained experimental data, KSK: Supervision of the work carried out for the article, discussion of obtained experimental data, finalization of article.

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Correspondence to K. Saravana Kumar.

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Punitha, J.S., Nataraj, A., Anbarasu, V. et al. Influence of La3+ substitution on the structural, magnetic and electrical characteristics of Sr2FeTiO6 double perovskites. J Mater Sci: Mater Electron 34, 1462 (2023). https://doi.org/10.1007/s10854-023-10793-0

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