Estimate of B-H Characteristics from Visualized Magnetic Domain Images by Bitter Method

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  • ビッター法を用いた磁区動画像からの磁化特性評価
  • ビッターホウ オ モチイタ ジク ドウガゾウ カラ ノ ジカ トクセイ ヒョウカ

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The Bitter method is most easily observing way of the magnetic domains even though it is limited to the surface. To observe the magnetic domains by Bitter method, magnetic liquid is put on the target magnetic material after electrical field polishing process. Applying magnetic field to this magnetic material covered by magnetic fluid makes it possible to observe the magnetic domain dynamics by a microscope. Principal purpose of this paper is to develop a magnetization measurement device for quality control of the magnetic materials by visualizing the magnetic domains by Bitter method. As a first step of our project, we reveal that local magnetization characteristics could be evaluated by means of the Bitter method.

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