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Structural and Magnetic Properties Evolution of Li-Substituted Co0.5Ni0.5Fe2O4 Ferrite

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Abstract

Four types of Co-Ni based ferrites materials with the general formula Li x Co0.5Ni0.5−x Fe2O4 (0.0 ≤ x≤0.3) were successfully synthesized by thermal decomposition of oxalates in air. The effect of substitution of diamagnetic Li+ ions for partial Ni2+ ions in a spinel lattice on the crystalline structure and the magnetic properties of Co-Ni ferrites was studied. X-ray diffraction examination confirms that a high-crystallized Li x Co0.5Ni0.5−x Fe2O4 with cubic spinel structure is obtained when the precursor is calcined at 900°C in air for 3 h. The substitution of Li+ ions for partial Ni2+ ions does not change the spinel crystalline structure of MFe2O4, but crystallinity of Li x Co0.5Ni0.5−x Fe2O4 can be improved. The incorporation of Li+ ions in place of Ni2+ ions in Co-Ni ferrites decreases the average crystallite size and results in higher specific saturation magnetization as compared to un-substituted Co-Ni ferrites. In this study, Li0.1Co0.5Ni0.4Fe2O4, obtained at 900°C, exhibits the highest specific saturation magnetization of 88 emu/g ± 2 emu/g and magnetic moment (3.60 μ B ± 0.05 μ B).

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (Grant Nos. 21161002 and 21603040).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, People’s Republic of China

    Xuehang Wu, Wen Chen, Wenwei Wu & Hongjiao Li

  2. Collaborative Innovation Center of Renewable Energy Materials, Guangxi University, Nanning, 530004, People’s Republic of China

    Xuehang Wu

  3. Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, Nanning, 530004, People’s Republic of China

    Cuiwu Lin

Authors
  1. Xuehang Wu
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  2. Wen Chen
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  3. Wenwei Wu
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  4. Hongjiao Li
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Correspondence to Wenwei Wu.

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Wu, X., Chen, W., Wu, W. et al. Structural and Magnetic Properties Evolution of Li-Substituted Co0.5Ni0.5Fe2O4 Ferrite. J. Electron. Mater. 46, 199–207 (2017). https://doi.org/10.1007/s11664-016-4877-7

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  • DOI: https://doi.org/10.1007/s11664-016-4877-7

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