Structural, physical, and magnetic analyses of Co-substituted BaFe2 W-type hexaferrites prepared via the solid-state reaction

Abstract

BaCoxFe2−x W-type hexagonal ferrites with nominal composition \( {\text{BaCo}}_{x} {\text{Fe}}_{2 - x}^{2 + } {\text{Fe}}_{16}^{3 + } {\text{O}}_{27} \) (x = 0.0, 0.5, 1.0, 1.5) were prepared by conventional solid-state reaction in nitrogen at high annealing temperature of 1350 °C. X-ray diffraction and scanning electron microscopy were used to find out the structural and physical properties of BaCoxFe2−x W-type hexaferrites. Vibrating-sample magnetometry was used to measure hysteresis (M vs. H) loops. Furthermore, magneto-crystalline anisotropy constant (K), Bohr magneton (nB), initial permeability (μi), and magnetic anisotropy fields (Ha) of Co in BaCoxFe2−x W-type hexaferrites were also calculated. Finally, the magnetic characteristics of magnets were also analyzed by BH measuring equipment.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51872004) and Doctoral Fund Project of Guangxi University of Science and Technology (200018-03190311).

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Correspondence to Hao He or Yimin Li.

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Tang, J., Li, D., He, H. et al. Structural, physical, and magnetic analyses of Co-substituted BaFe2 W-type hexaferrites prepared via the solid-state reaction. Appl. Phys. A 126, 277 (2020). https://doi.org/10.1007/s00339-020-3425-8

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Keywords

  • W-type hexaferrites
  • X-ray diffraction (XRD)
  • Scanning electron microscopy (SEM)
  • Microstructure
  • Magnetic properties