巻号一覧
14 巻, 4 号
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論文
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由比藤 勇, 佐々木 忍, 濱川 佳弘, 森脇 英稔, 西岡 浩一1990 年 14 巻 4 号 p. 636-641
発行日: 1990/08/31
公開日: 2013/01/11
ジャーナル オープンアクセスHigh frequency magnetization changes on soft magnetic films were studied using the scanning Kerr microscope. At about 1 MHz, magnetization rotation near 90° walls was smaller than that at central region in hexagonal domains closed by 180° and 90° walls due to decrease of magnetic charge generation at 90° walls. However, at above 10 MHz, the magnetization change was reversed the two portions mentioned above and triangular closure domains showed very high magnetization rotation. The magnetization rotation at closure domains was largest at 5～6 MHz. This may be caused by magnetic resonance, but further investigation will still be needed. The phase shift of the magnetization rotation was equal at the edge of the hexagonal domain and at the closure domains. However, at 10 MHz, hexagonal domains showed a 10° phase shift between the edge and the central region.抄録全体を表示PDF形式でダウンロード (395K) -
―固定検光子法における光回折を考慮した計算―沼田 卓久, 棚池 博行, 井口 征士, 桜井 良文1990 年 14 巻 4 号 p. 642-647
発行日: 1990/08/31
公開日: 2013/01/11
ジャーナル オープンアクセスIt has been made clear theoretically that Faraday loops which are often utilized for characterization in magnetic materials with multidomain differ from the magnetization curves when loops are traced with a single-ended fixed analyzer method as well as an extinction method. This is attributed to the light diffraction by the domains. The loops depend on the range of the diffracted beams allowed for the detection. When the detector accepts the entirety of the diffracted beams, the loop has the same shape as the magnetization curve. On the other hand, when only the zeroth-order beam is detected, the loop becomes deformed including a quadratic form of magnetization. However, such a loop deformation is completely eliminated by employing a dual-ended differential fixed analyzer method. It has been shown that the double-ended method is so excellent that loops whose shapes are equivalent to the magnetization curves can be traced even for materials with a large Faraday rotation.抄録全体を表示PDF形式でダウンロード (347K) -
―実験による検証―棚池 博行, 沼田 卓久, 井口 征士, 桜井 良文1990 年 14 巻 4 号 p. 648-652
発行日: 1990/08/31
公開日: 2013/01/11
ジャーナル オープンアクセスThe interpretation of Faraday loops of multidomain materials described theoretically in ref. 5 has been confirmed experimentally. A single-ended fixed analyzer method offers Faraday loops with the same shape with the magnetization curves if all the beams diffracted by the domains are detected. A double-ended method presents ideal loops, from which magnetic characteristics except for the absolute value of magnetization can be estimated as well as from the magnetization curves, only if the zeroth-order diffracted beam is captured with the detctor. The double-ended method preserved this superiority for material with a large Faraday rotation, i.e. independent of wavelength at which loops are traced.抄録全体を表示PDF形式でダウンロード (255K)
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