Journal of Magnetics

  • 제21권3호
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  • Pages.315-321
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  • 2016
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  • 1226-1750(pISSN)
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  • 2233-6656(eISSN)
한국자기학회 (The Korean Magnetics Society)
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M-Zn (M = Sb, V, and Nb) Substituted Strontium Hexaferrites with Enhanced Saturation Magnetization for Permanent Magnet Applications

  • Sapoletova, Nina (Corporate R&D Institute, Samsung Electro-Mechanics) ;
  • Kushnir, Sergey (Corporate R&D Institute, Samsung Electro-Mechanics) ;
  • Ahn, Kyunghan (Corporate R&D Institute, Samsung Electro-Mechanics) ;
  • An, Sung Yong (Corporate R&D Institute, Samsung Electro-Mechanics) ;
  • Choi, Moonhee (Corporate R&D Institute, Samsung Electro-Mechanics) ;
  • Kim, Jae Yeong (Corporate R&D Institute, Samsung Electro-Mechanics) ;
  • Choi, Changhak (Corporate R&D Institute, Samsung Electro-Mechanics) ;
  • Wi, Sungkwon (Corporate R&D Institute, Samsung Electro-Mechanics)
  • 투고 : 2016.05.25
  • 심사 : 2016.07.19
  • 발행 : 2016.09.30
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초록

M-Zn (M = Sb, V, Nb) substituted M-type strontium hexaferrites were prepared by a ceramic method. The phase composition, morphology and magnetic properties were studied by x-ray diffractometry, scanning electron microscopy and vibrating sample magnetometry. Saturation magnetization increases with a substitution up to 75.0 emu/g (2.5 % higher compared to unsubstituted hexaferrite) and then decreases with a further substitution. A coercive field of substituted hexaferrite powders with highest saturation magnetization is more than 3 kOe. Substituted strontium hexaferrite powders prepared in this work are a rare example of high $M_S$ compositions without doping rare-earth elements and would be a promising candidate for a permanent magnet application.

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