強磁性金属超微粒子の磁気的性質 Ferromagnetic Properties of Ultra Fine Metal Particles

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Ferromagnetic ultra metallic fine particles of Fe, Ni and Co were prepared by a gas evaporation method in the pressure of nitrogen gas from 0.5-4Torr. Fine structures of these particles were revealed by a transmission electron microscope and a scanning electron microscope (SEM). Magnetic properties of the particles were measured by a vibrating sample magnetometer. The Fe, Ni and Co ultra fine particles observed by SEM were regarded as spheres and their surfaces were composed of oxide layers Fe<SUB>3</SUB>O<SUB>4</SUB>, NiO and CoO, respectively. The maximum coercivity was 1320, 1160 and 290Oe, respectively, for Co (425Å), Fe (310Å) and Ni (415Å) at room temperature. The exchange magnetic anisotropy between the cobalt core and the cobalt oxide shell was observed when the Co ultra fine particles were cooled in an applied field of 7kOe from room temperature to 77K.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 43(12), 1411-1414, 1996-12-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002261157
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4118675
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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