Abstract
M-type permanent magnetic ferrite Sr1−x Y x Fe12O19 (x = 0.00, 0.02, 0.05, 0.08, 0.10, 0.13) magnetic powders have been synthesised by the ceramic process. Phase composition was examined by using X-ray diffraction (XRD). The single magnetoplumite phase structure transformed into multiphase structure with the increase of yttrium content, where the small amount of hematite phase existed in M-type phase. It was found that powders were crystallized into M-type hexaferrites phase at 1250 °C. The micrographs of the magnetic powders were observed by a field emission scanning electron microscopy (SEM). The micro-morphology of the particles exhibits the uniform plane hexagonal structures of M-type ferrites with different yttrium contents. Vibrating sample magnetometer (VSM) was employed to investigate the magnetic properties. With the increasing of yttrium content, the saturation magnetization (Ms) first increases and then decreases. The saturation magnetization (Ms) has the maximum value at x = 0.05 (Ms = 62.74 emu/g). The value of coercivity (Hc) increases with the increasing of yttrium content, and the value of coercivity (Hc) is up to 3634 Oe when the amount of do** is 0.13.
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Acknowledgments
The authors acknowledge the financial support from the National Natural Science Foundation of China under Grant Nos. 51272003, 51472004, 11375011 and 21271007, the Natural Science Foundation of Anhui province under Grant Nos.1408085MA12, the Key Program of the Education Department of Anhui Province (Grant Nos. KJ2013B057 and KJ2012A027) from the Research Fund for the Doctoral Program of Higher Education of China under project 20123401110008.
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Jiang, S., Liu, X., Rehman, K.M.U. et al. Synthesis and characterization of Sr1−x Y x Fe12O19 hexaferrites prepared by solid-state reaction method. J Mater Sci: Mater Electron 27, 12919–12924 (2016). https://doi.org/10.1007/s10854-016-5428-y
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DOI: https://doi.org/10.1007/s10854-016-5428-y