• Title/Summary/Keyword: M-type Strontium hexaferrite

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M-Zn (M = Sb, V, and Nb) Substituted Strontium Hexaferrites with Enhanced Saturation Magnetization for Permanent Magnet Applications

  • Sapoletova, Nina;Kushnir, Sergey;Ahn, Kyunghan;An, Sung Yong;Choi, Moonhee;Kim, Jae Yeong;Choi, Changhak;Wi, Sungkwon
    • Journal of Magnetics
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    • v.21 no.3
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    • pp.315-321
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    • 2016
  • 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.