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The role of Mo6+ ion substitution on the electrical and dielectric features of SrNi-hexaferrites

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Abstract

The Mo6+ ions-doped SrNi-hexaferrites, Sr0.8Ni0.2MoxFe12−2xO19 (x ≤ 0.35) HFs, were manufactured by sol–gel approach. Microstructure was analyzed through XRD, SEM–EDX, TEM, and HR-TEM. The effect of Mo6+ ions substitution on the electric-dielectric features of SrNi-HFs has been studied versus frequency and at different temperatures by impedance spectroscopy technique. It has been pointed out that the ac conductivity obeys the power law rule of f, and it is found that the dependencies of both T and substitution ratios in SrNi-HFs are highly influential for grains and grain boundaries. The levels of activation (Ea) determined from dc electrical conductivity fluctuate with the Mo6+ ion substitution into SrNi-HFs implying that the mechanism of conduction is due to the contribution of both polaron and electron hopping. The dielectric parameters were found to be f dependent at T up to 120 °C for various Mo6+ substitution ratios. The complex impedance of Cole–Cole plots shows a semicircle of different dimensions that depend on T, indicating that the resistive and capacitive responses of SrNi-HFs are because of the contribution of grain boundaries and grains formed in the HFs` structures. It has been detected that although the Mo6+ ion substitution creates relatively small differences on grain resistance, it causes a notable change in grain boundary resistance in the SrNi-HFs` system.

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Acknowledgements

MAA, AB, and YS acknowledged the Institute for Research and Medical Consultations of Imam Abdulrahman Bin Faisal University (Dammam, Saudi Arabia) for providing laboratory facilities.

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Authors and Affiliations

  1. Institute of Forensic Sciences and Legal Medicine, Istanbul University-Cerrahpasa, Buyukcekmece Campus, Buyukcekmece, Istanbul, 34500, Turkey

    B. Ünal

  2. Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, Saudi Arabia

    M. A. Almessiere & Y. Slimani

  3. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, Saudi Arabia

    M. A. Almessiere

  4. Department of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, Saudi Arabia

    R. Jermy & A. Baykal

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Contributions

BÜ, MAA contributed to conceptualization and design of the work. BÜ contributed to investigation, writing, and explaining. YS and MAA contributed to formal analysis. AB and RJ contributed to project administration, editing, and writing—review and editing.

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Correspondence to M. A. Almessiere.

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Ünal, B., Almessiere, M.A., Slimani, Y. et al. The role of Mo6+ ion substitution on the electrical and dielectric features of SrNi-hexaferrites. J Mater Sci: Mater Electron 34, 1386 (2023). https://doi.org/10.1007/s10854-023-10744-9

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