巻号一覧
21 巻, 8 号
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論文
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広兼 順司, 高橋 明1997 年 21 巻 8 号 p. 1076-1081
発行日: 1997年
公開日: 2007/08/20
ジャーナル オープンアクセスA high-density magneto-optical disk was realized through the use of center aperture detection (CAD), a magnetically induced superresolution (MSR) readout method, employing the magnetostatic coupling force. In this investigation, an in-plane magnetization mask layer having a low Curie temperature was formed over the readout layer of CAD. The in-plane magnetization mask of the readout layer was strengthened by the exchange coupling force between the readout layer and the in-plane magnetization mask layer. The use of the latter layer made it possible to obtain higher resolution.抄録全体を表示PDF形式でダウンロード (459K) -
澤入 弘也, 藤倉 昌浩, 佐藤 駿1997 年 21 巻 8 号 p. 1082-1087
発行日: 1997年
公開日: 2007/08/20
ジャーナル オープンアクセスFe-based amorphous alloys containing Al and Ti as impurities become surface-crystallized during casting, with a resultant deterioration in their soft magnetic properties. This study shows that the surface crystallization is accelerated by decreasing in the quenching rate, and that there are big differences in the crystallization behavior between Al and Ti. It is found that the magnetic properties are governed not by the morphology of the crystallites formed, but by the thickness of the crystalline layers in which the crystallites are distributed.抄録全体を表示PDF形式でダウンロード (421K) -
加藤 和照, 武野 幸雄, 北上 修, 島田 寛1997 年 21 巻 8 号 p. 1088-1093
発行日: 1997年
公開日: 2007/08/20
ジャーナル オープンアクセスThe relationship between magnetic softness and the precipitation process of highly resistive soft magnetic TM-M-X [TM: Fe, Co, M: Metal, X: O, N] films was investigated.The as-sputtered and incompletely phase-separated state of Fe-Al-O, Fe-Sm-O, and Fe-V-O films show magnetic softness. This soft magnetic property is attributed to the exchange coupling of neighboring magnetic crystals through the intergranular phase. However, Fe-B-N and Co-Sm-O films show perpendicular anisotropy over the whole annealing temperature range, because it is easy to separate TM-X and M-X owing to their extremely high diffusion rate and the large difference between their Gibbs free energies (−ΔG°diff). These results indicate that the small diffusion coefficient of M and X in TM (D), the large critical radii of crystal nucleation of M-X compounds (r*), the high melting points of M-X compounds (Tm) and the large −ΔG°diff. are essential factors in the formation of stable hetero-granular structures with both magnetic softness and high resistivity.抄録全体を表示PDF形式でダウンロード (500K)
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