E.S.D.鉄粉磁石とその磁気的性質について

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タイトル別名
  • On the Elongated Single-Domain Iron Magnet and its Magnetic Properties
  • E.S.D.テップン ジシャク ト ソノ ジキテキ セイシツ ニ ツイテ

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抄録

Fine iron powders were prepared by electrodeposition into a mercury cathode, and both their particle-size distributions and their dimension ratios (length/diameter) were examined directly by electron micrographs. As the result of our experiments, it has been verified that the concentration of ferrous sulphate and hydrogen ion in electrolytic solutions and the heat-treatment of electrodeposited iron powders have a marked effect on the magnetic properties of ESD (elongated single-domain) iron magnets. Of course, these magnetic properties depend on the packing factor of fine iron powders. The heat-treatment makes the diameters of electrodeposited iron powders large and increases the ratio of the metallic part to the oxidized part, making the packing operation of powders more easy. In the packed state of fine powders oriented at random and ranging from 150 to 300 Å, the relation between the average dimension-ratio and the intrinsic coercive force are consistent with the Jacobs and Bean\'{s} model, and also with Pain, Mendelsohn, and Luborsky’s experimental results.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (7), 429-432, 1959

    公益社団法人 日本金属学会

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