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Effect of Ni2+and Co2+ substitution on the characteristics of the strontium aluminum hexaferrite (SrAl2Fe10O19)

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Abstract

The nickel and cobalt substituted strontium aluminum hexaferrite Sr1-xNixAl2Fe10O19/Sr1-xCoxAl2Fe10O19 (x = 0.1, 0.2) were synthesized via the sol-gel auto-combustion technique using glycine fuel. The particles formed in the hexagonal crystal structure with space group P63/mmc. The crystallite size of the sample varied in the range of 49–58 nm. The field-emission scanning microscopy was adopted for morphological analysis, and the images revealed the plate-like formation of the particles. X-ray photoelectron spectroscopy confirmed the presence and oxidation states of all the elements. The variation of magnetic parameters as magnetic saturation (33.96–41.54 emu/gm), coercivity (3681–7647 Oe), squareness ratio (0.6), and energy product values (0.23–0.40 MGOe) were studied through vibrating sample magnetometer. The electric studies disclosed the presence of relaxations in the system, which was interpreted through Koop and Maxwell-Wagner’s model. The synthesized samples are potential candidates for permanent magnet and magnetic recording media applications owing their remarkable magnetic properties.

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Highlights

  • Conventional and economical sol-gel auto-combustion method was adopted for the synthesis procedure.

  • Double site substitution was performed to investigate the effect on magnetic and dielectric properties.

  • Substitution of Ni yielded a notable energy product value (BHmax) of 3.18 kJ/m3.

  • High dielectric constant values suggest sample’s potential application in microwave frequency range.

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Acknowledgements

The authors would like to acknowledge VIT management for the facilities provided for this work. The authors also would like to convey their gratefulness to all the lab members.

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  1. School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India

    Himani Joshi & A. Ruban Kumar

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  1. Himani Joshi
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Conceptualization, Methodology, Formal analysis, and investigation, Writing—original draft preparation: HJ; Writing—review and editing, Supervision: ARK.

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Correspondence to A. Ruban Kumar.

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Joshi, H., Ruban Kumar, A. Effect of Ni2+and Co2+ substitution on the characteristics of the strontium aluminum hexaferrite (SrAl2Fe10O19). J Sol-Gel Sci Technol 109, 32–55 (2024). https://doi.org/10.1007/s10971-023-06245-0

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