E.S.D.Fe-Co磁石とその磁気的性質について

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書誌事項

タイトル別名
  • On the Elongated Single Domain Iron-Cobalt Magnet and its Magnetic Properties
  • E.S.D.Fe-Co 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

Elongated single domain iron-cobalt fine powders were prepared by electrodeposition onto a mercury cathode. After heat-treating at 175∼250°C for 10∼60 minutes, their average diameters and dimensional ratios were examined, using the distribution graphs obtained from their electron micrographs. Our experiments have shown that, in such surface-oxidized particles, the inner metallic part is enriched in cobalt, whereas the oxidized surface is enriched in iron because of the selective oxidization of iron. Also, on the basis of the relation between the cobalt content and the coercive force of particles of given average diameter and average dimension ratio, it was shown that these particles exhibited shape anisotropy as was pointed out by Luborsky and his colaborators. Furthere, the magnetic properties of powders pressed isotropically into a cylindrical form with various packing factors were examined, and it has been verified that specimens pressed 35∼40% have optimum magnetic properties at about 50% cobalt content.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (9), 585-588, 1960

    公益社団法人 日本金属学会

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