Abstract
Hexaferrite Sr1−x La x Fe12−x (Cu0.5Co0.5) x O19 (0 ≤ x ≤ 0.50) magnetic powders and magnets were synthesized by the solid-state reaction method. The phase compositions of magnetic powders were investigated by X-ray diffraction. The single magnetoplumbite phase is obtained in magnetic powders with x from 0 to 0.40. At x = 0.50, CoFe2O4, and α-Fe2O3 were observed. The morphology of the materials was characterized by a field-emission scanning electron microscopy. The particles were hexagonal platelets. Magnetic properties of the materials were measured by a permanent magnetic measure equipment. The remanence of the materials increases with x from 0 to 0.50. However, the intrinsic coercivity and magnetic induction coercivity of the materials increase with x from 0 to 0.15, and decreases when x varies from 0.15 to 0.50. Accordingly, the maximum energy product of the materials first increases with x from 0 to 0.35, and then decreases when x exceeds 0.35.
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Acknowledgements
We acknowledge the financial support from the National Science Foundation of China under Grant nos. 51272003, 51472004, 11375011 and 21271007; the Natural Science Foundation of Anhui Province under Grant no. 1408085MA12; the Key Program of the Education Department of Anhui Province (Grant nos. KJ2013B057 and KJ2012B027); and from the Research Program of Higher Education of China under project 20123401110008.
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YANG, Y., WANG, F., SHAO, J. et al. Structural and magnetic properties of Sr1−x La x Fe12−x (Cu0.5Co0.5) x O19 hexaferrites prepared by the solid-state reaction method. Bull Mater Sci 39, 119–123 (2016). https://doi.org/10.1007/s12034-015-1110-x
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DOI: https://doi.org/10.1007/s12034-015-1110-x