On the Magneto Resistance Effect and the Electric Resistance of Single Crystals of Cobalt

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  • Masumoto Hakaru
    The Foundation, The Research Institute of Electric and Magnetic Alloys
  • Saitô Hideo
    The Research Institute for Iron, Steel and Other Metals, Tôhoku University
  • Kikuchi Michio
    The Foundation, The Research Institute of Electric and Magnetic Alloys

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  • 六方晶コバルト単結晶の電気抵抗の異方性ならびに磁気抵抗効果について
  • 6ポウショウ コバルトタンケッショウ ノ デンキ テイコウ ノ イホウセイ ナラビニ ジキ テイコウ コウカ ニ ツイテ

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Abstract

The present investigators have succeeded for the first time to prepare long bar specimens of single crystals of close packed hexagonal cobalt, about 10 cm long. And with these single crystals, the anisotropy of electrical resistivity and the magneto resistance effect up to the field of 1000 Oe were measured. It was found that the specific electrical resistivity was the largest in the c-axis direction and the smallest in the direction perpendicular to the axis; the values of 10.280 μΩ-cm and 5.544 μΩ-cm were obtained, respectively, and the values of ΔR⁄R were about 0.4 percent in the c-axis direction and about 0.2 percent in the direction perpendicular to the axis.

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