Abstract
Co2Z is a planar ferrite, particularly suitable for soft magnetic applications. There is currently a lack of in-depth research on its high-frequency properties. La3+ ion is a potential ion to regulate its magnetism. Based on this, the crystal structure, microstructure, static, and dynamic magnetic properties of Ba3−xLaxCo2Fe24O41 (x = 0.0, 0.05, 0.1, 0.15, 0.2, and 0.25) ceramics were investigated. The findings demonstrate that La substitution retains the crystal structure and form, yet the introduction of extra charge leads to the formation of Fe2+ ions, resulting in a slight decrease in magnetic moment from 51.9 to 48.9 emu/g, while a notable increase in the out-of-plane anisotropic field from 12.2 to 18.3 kOe, which significantly impacts the high-frequency complex magnetic permeability spectrum. Additionally, a thorough analysis of the high-frequency magnetic spectrum indicates that both domain wall movement and magnetization rotation contribute to the magnetic permeability, with magnetization rotation playing predominant. Particularly exciting is that the high-frequency magnetic spectrum results show that the substitution of La for Ba considerably raises the resonance frequency from 2.41 to 3.30 GHz that can be attributed to the increased anisotropy. In conclusion, the substitution of La markedly enhances the high-frequency magnetic properties of Co2Z.
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Funding
This work was supported by the National Key R&D Program of China (No. 2022YFB3504800), by the National Natural Science Foundation of China (Grant No. 62271106), and by the National Key Research and Development Program of China (No. 2018YFE0115500).
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Yanlin Ma contributed to Data curation, Investigation, Methodology, Software, and Writing—original draft. Jie Li contributed to Conceptualization, Funding acquisition, Supervision, and Writing—review & editing. Yida Lei contributed to Resources and Software. Kui Liu contributed to Data curation. Yang Xiao contributed to Methodology. Lei Liu contributed to Formal analysis. Yingli Liu contributed to Project administration. Zhiyong Zhong contributed to Conceptualization, Supervision.
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Ma, Y., Li, J., Lei, Y. et al. Enhanced magnetic anisotropy in structure, static, and dynamic magnetic properties for Ba3−xLaxCo2Fe24O41 hexaferrites. J Mater Sci: Mater Electron 35, 1669 (2024). https://doi.org/10.1007/s10854-024-13422-6
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DOI: https://doi.org/10.1007/s10854-024-13422-6