Abstract
W-type ferrite Sr1−xLaxFe22+Fe163+O27 (x = 0.00, 0.05, 0.08, 0.10, 0.13 and 0.15) powders and magnets were prepared via the solid-state reaction in nitrogen. Phase components of the powder samples were examined by X-ray diffraction (XRD). XRD results demonstrated the appearance of pure phase hexagonal crystal structure and calculate the lattice constants c and a, c/a ratio, cell volume (Vcell), X-ray density (dX-ray) and crystallite size (D) parameters according to XRD data. Scanning electron microscopy (SEM) was used to observe the morphology of the magnets. SEM analyses revealed the hexagonal morphology of the ferrites. The magnetic characteristics of magnetic powders were measured by a vibrating sample magnetometer (VSM), and the magnetic characteristics of magnets were also measured by a permanent magnetic measuring equipment. The results indicate that, the synthesized samples with a low coercive force value and a considerable saturation magnetization are best able to make optical read-out of the magnetic storage information in erasable video and audio discs.
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This work was funded by the National Natural Science Foundation of China (Nos. 51472004, 51272003).
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Tang, J., Liu, X., Li, D. et al. Structure and magnetic analyses of hexaferrite Sr1−xLaxFe22+Fe163+O27 prepared via the solid-state reaction. J Mater Sci: Mater Electron 30, 284–291 (2019). https://doi.org/10.1007/s10854-018-0291-7
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DOI: https://doi.org/10.1007/s10854-018-0291-7