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A study on the tunable magnetic and magnetodielectric properties of KBFO-CFO composite

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Abstract

Multiferroic materials are very important in the current need for material science and multifunctional technological applications. KBiFe2O5 (KBFO) belongs to the brownmillerite family, which shows the weak magnetic and magnetodielectric coupling in the earlier report. To overcome these challenges, the present work focuses on synthesizing and characterization of polycrystalline multiferroic composites. In this regard, the parent material KBiFe2O5 (KBFO), CoFe2O4 (CFO), and its composites (1 − x)KBFO-(x)(CFO) where x = 0.1, 0.2, and 0.3 are synthesized using the citric-assisted sol–gel method. The composite’s magnetic, dielectric, and magnetodielectric properties are investigated over a wide temperature range (300 K to 873 K) to verify its magnetic and dielectric transitions. Observations include improved dielectric properties at 4.602 × 106, enhanced magnetic coercivity at 1488.7955 ± 18.8897 Oe for the 0.8KBFO-0.2CFO composite, and remanent magnetization at 6.5899 ± 0.0551 emu/g for the 0.7KBFO-0.3CFO composite. We observed the enhanced magnetodielectric (MD) properties of the 0.8KBFO-0.2CFO composite at room temperature, which are ~ 3% in field-scanning mode and ~ 20% in frequency scanning mode. Switching MD coupling in the composite at room temperature can be important for applications involving spintronics, energy harvesting, and information storage devices.

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Acknowledgements

DPS would like to acknowledge the Department of Science and Technology (DST) for fellowship (No: DST/INSPIRE Fellowship/2020/IF200304). AKS would like to acknowledge UGC-DAE CSR Mumbai, India (Project No: CRS/2021-22/03/585) for funding.

Funding

This work was supported by UGC-DAE Consortium for Scientific Research, University Grants Commission (Grant no. CRS/2021-22/03/585), Department of Science and Technology, Ministry of Science and Technology, India (Grant no. DST/INSPIRE Fellowship/2020/IF200304).

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Authors and Affiliations

  1. Department of Physics and Astronomy, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India

    D. P. Sahu, A. Mohanty, G. Palai & A. K. Singh

  2. Department of Physics, Madanapalle Institute of Technology & Science, Madanapalle, 517235, Andhra Pradesh, India

    K. Chandrakanta & R. Jena

  3. UGC-DAE-Consortium for Scientific Research Mumbai Centre, BARC, Mumbai, 400085, India

    S. D. Kaushik

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  1. D. P. Sahu
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  2. A. Mohanty
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  6. S. D. Kaushik
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Contributions

All authors contributed to the study conception and design. Mr. D. P. Sahu conducted all experiments, performed data analysis, and wrote the first draft of the manuscript. Miss A. Mohanty and G. Palai participated in analyzing XRD data. Mr. D. P. Sahu, Dr. K. Chandrkanta, and R. Jena analyzed dielectric data. Dr. S. D. Kaushik contributed to the magnetic data analysis. Dr. A. K. Singh served as the overall originator of the scientific work.

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Correspondence to A. K. Singh.

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Sahu, D.P., Mohanty, A., Palai, G. et al. A study on the tunable magnetic and magnetodielectric properties of KBFO-CFO composite. J Mater Sci: Mater Electron 35, 820 (2024). https://doi.org/10.1007/s10854-024-12578-5

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