通電熱処理による周方向に異方性を付与したアモルファス薄帯の磁気特性

概要

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Domain and magnetic characteristics were investigated for an Fe-Co based amorphous ribbon with nearly zero magnetostriction. To induce anisotropy in the circumferential direction near the ribbon surface and in the longitudinal direction in the interior region of ribbon, the ribbon was annealed in fields applied simultaneously in the circumferential direction by a current through the ribbon and in the longitudinal direction by a solenoid. It was found that the ribbon annealed in this way exhibited the characteristics of large Barkhausen discontinuities (BHD) with a remanence ratio of 0. 52 at a threshold field of about 0. 5 Oe. Arc-shaped fine domains and a single domain configuration were observed near the ribbon ends and in the central region of the ribbon, respectively. It is expected that the ribbon has a similar domain configuration, consisting of core and shell domains, to that of die-drawn Fe-based wire. It is inferred from the domain observation that the BHD can be attributed to the depinning of the pinned domain near the ribbon end.
社団法人日本磁気学会の論文
2000-04-15