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The transformation behavior of M-type barium ferrites due to Co–Ti substitution

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Abstract

In this paper, we synthesized Co–Ti equiatomic co-substitution of M-type barium ferrites [BaFe12−2x(CoTi)xO19, x = 1.00–1.30 with step of 0.05] by solid state reaction method. All samples exhibited a single-phase M-type barium ferrite structure, compared with pure M-type barium ferrite (x = 0.00). With increasing of Co–Ti content, saturation magnetization (M s) decreased, gradually. However, coercivity (H c) appeared decreased first and then increased after x = 1.20. The minimum value of coercivity was 258.08 Oe at x = 1.20. Meanwhile, magnetic permeability (μ) also first increased to a high value and then decreased rapidly after x = 1.20. The maximum value of μ reached about 25 (at x = 1.10). The appropriate contents of Co–Ti substitution makes the magnetocrystalline anisotropy transform from uniaxial to planar anisotropy. Due to Co–Ti substitution, the magnetocrystalline anisotropy constant decreases from a high value and reach a minimum value, and changes from positive to negative value, increases oppositely, this determines the changes of magnetic properties.

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Acknowledgments

The authors acknowledge the Financial support provided by the Major State Basic Research Development Program of China (973 Program) (Grant No. 2012CB933100). J. Li acknowledges the scholarship support from the Chinese Scholarship Council.

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Authors and Affiliations

  1. State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China

    Jie Li, Huaiwu Zhang, Qiang Li & Guokun Ma

  2. School of Mechanical and Chemical Engineering, University of Western Australia, Perth, Australia

    Jie Li, Yinong Liu & Hong Yang

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  1. Jie Li
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  2. Huaiwu Zhang
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Correspondence to Jie Li.

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Li, J., Zhang, H., Liu, Y. et al. The transformation behavior of M-type barium ferrites due to Co–Ti substitution. J Mater Sci: Mater Electron 26, 4668–4674 (2015). https://doi.org/10.1007/s10854-015-2712-1

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  • DOI: https://doi.org/10.1007/s10854-015-2712-1

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