日本応用磁気学会誌

論文

Fe₁₆N₂単結晶薄膜のエピタキシャル成長と磁気特性

小室又洋, 小園裕三, 華園雅信, 杉田愃

1990 年 14 巻 5 号 p. 701-706
発行日: 1990/11/30
公開日: 2013/01/11

DOIhttps://doi.org/10.3379/jmsjmag.14.701

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Single crystal Fe₁₆N₂ films have been epitaxially grown by MBE onto very thin single crystal Fe films using In_0.2Ga_0.8As (100) substrates. To obtain Fe₁₆N₂ single crystal films, the growth rates of Fe₁₆N₂ and Fe should be reduced to 0.006Å/sec and 0.03Å/sec, respectively. The saturation magnetic flux density of Fe₁₆N₂ single crystal films is 2.8～2.9 T. This value is in good agreement with the expected value by Kim and Takahashi. The coercive force He is about 10 Oe. The easy axis of Fe₁₆N₂ is <111>. The magnetic anisotropy constant K₁ and K₂ are －5.84×10⁵ erg/cc and 6.10×10⁵ erg/cc, respectively.

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Fd-Pd基合金の磁気弾性異方性

岸田紀雄, 門脇静穏, 中山孝文

1990 年 14 巻 5 号 p. 707-711
発行日: 1990/11/30
公開日: 2013/01/11

DOIhttps://doi.org/10.3379/jmsjmag.14.707

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The dependence of electromechanical coupling constant k on the angle from rolling direction and the recrystallization texture were studied for Fe-30% Pd-2%C alloy. The constant k derived from ΔE effect shows distinct angle dependence in the rolling plane at a rolling reduction of 75%, while it becomes indistinct at 60 and 80% reductions. The k value has a tendency to increase by higher rolling reduction. The (001) [100] and (110) [100] recrystallization textures appear at 75%, and (110) [112] is specified at 80%. These results are discussed by taking into account of the magnetocrystalline anisotropy of the alloy.

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高B_s (6300 G) MnZnフェライト磁気ヘッド

廣田健, 里見三男, 山下真郷, 釘宮公一

1990 年 14 巻 5 号 p. 712-716
発行日: 1990/11/30
公開日: 2013/01/11

DOIhttps://doi.org/10.3379/jmsjmag.14.712

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The high B_s (6300 G; 0,63 T) Mn-Zn ferrite poly-crystals (K₁～0, λ_s≫0) with high permeability at high frequency by control of their microstructure were examined for application to the material of “Winchester” type monolithic computer head. The high B_s head showd superiority in the recording density, D₅₀, and wave width, P_w50, compared with that of one made of conventional Mn-Zn ferrite (B_s～5000 G; 0.5 T), due to the improvement of the magnetic field at the gap of the head because of its high saturation magnetization. However, the problem of head output deterioration after increasing the CSS (Contact Start Stop) remained.

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