Abstract
Barium hexagonal ferrites (BaNd x Fe12−x O 19) have been synthesized by initial high-energy milling of the precursors and calcining subsequently. The as-prepared samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM). XRD and SEM examinations reveal that a high-crystallized hexagonal BaNd x Fe12−x O 19 with lamellar morphology is obtained when the precursor is calcined at 1200∘C in air for 3 h. The hexagonal crystalline structure of BaFe12 O 19 is not changed after doping Nd3+ ions in BaFe12 O 19. However, lattice parameters a and b values increase with an increase in Nd content at first, then decrease. Nd substitution may improve the magnetic properties of BaNd x Fe12−x O 19. BaNd0.1Fe11.9 O 19, obtained at 1050∘C, has the highest specific saturation magnetization value (80.81 emu/g) and magnetic moment (16.21 μ B); BaNd0.2Fe11.8 O 19, obtained at 950∘C, has the highest coercivity value, 4075.19 Oe.
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This study was financially supported by the National Natural Science Foundation of China (Grant no. 21161002, 21603040), the Guangxi Natural Science Foundation of China (Grant no. 2016GXNSFDA380034, 2016GXNSFBA380062), and the Guangxi University Student Innovation Foundation of China (Grant no. 30).
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Chen, W., Wu, W., Mao, M. et al. Improvement of the Magnetization of Barium Hexaferrites Induced by Substitution of Nd3+ Ions for Fe3+ Ions. J Supercond Nov Magn 30, 707–714 (2017). https://doi.org/10.1007/s10948-016-3886-3
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DOI: https://doi.org/10.1007/s10948-016-3886-3