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Microstructure and properties of lanthanide series M-type hexaferrites

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A series of M-type hexagonal ferrites with the composition Ba1−xLaxFe11.6Co0.2Ti0.2O19 (x = 0.00, 0.10, 0.15, 0.20, 0.25, 0.30) were prepared by the ceramic process during the whole process of pre-sintering and sintering. The phase composition, micro-morphology, and magnetic properties of the particles were investigated by XRD, SEM, and VSM. With the increase of La content, the single magnetoplumbite phase structure transformed into multiphase structure. Meanwhile, the small amount of α-Fe2O3 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). With different La contents, the micro-morphology of the particles exhibited the uniform plane hexagonal structures of M-type ferrites. The magnetic properties were investigated by Vibrating sample magnetometer (VSM). The saturation magnetization (M s ) increases and then decreases with the increasing of La content. The saturation magnetization (M s ) has the maximum value at x = 0.20 (M s  = 61.85 emu/g). The value of coercivity (H c ) is up to 3428 Oe when the amount of doping is 0.30, and the value of coercivity (H c ) increases with the increasing of La content.

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Acknowledgements

This work was supported by the authors acknowledge the financial support from the National Natural Science Foundation of China under Grant Nos. 51072002, 51272003, 51472004, 11375011 and 21271007, the Anhui University “211 Project” Academic Innovation Team projects (No. 02303402), the Natural Science Foundation of Anhui province under Grant Nos.1408085MA12, the Key Program of the Education Department of Anhui Province (Grant Nos. KJ2010A008, KJ2013B057 and KJ2012A027), from the Research Fund for the Doctoral Program of Higher Education of China under project 20123401110008.

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Authors and Affiliations

  1. School of Physics and Materials Science, Anhui University, 111 Jiulong Road, Hefei, 230601, People’s Republic of China

    Xiangyu Meng, Xiansong Liu, Chaocheng Liu, Cong Zhang, Haohao Li & Khalid Mehmood Ur Rehman

  2. Engineering Technology Research Center of Magnetic Materials, School of Physics & Materials Science, Anhui University, Hefei, 230601, People’s Republic of China

    Xiansong Liu

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  1. Xiangyu Meng
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Correspondence to Xiansong Liu.

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Meng, X., Liu, X., Liu, C. et al. Microstructure and properties of lanthanide series M-type hexaferrites. J Mater Sci: Mater Electron 28, 6352–6357 (2017). https://doi.org/10.1007/s10854-016-6319-y

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  • DOI: https://doi.org/10.1007/s10854-016-6319-y

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