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    • 2. 发明授权
    • Iron oxide magnetic film and process for fabrication thereof
    • 氧化铁磁性膜及其制造方法
    • US4544612A
    • 1985-10-01
    • US532978
    • 1983-09-16
    • Osamu IshiiFumikatsu YoshimuraIwao Hatakeyama
    • Osamu IshiiFumikatsu YoshimuraIwao Hatakeyama
    • H01F10/18B32B15/18
    • H01F10/18Y10S428/90
    • .gamma.-Fe.sub.2 O.sub.3 film with at least one additive selected from the group consisting of Pd, Au, Pt, Rh, Ag, Ru, Ir, and Os, especially Os are disclosed. Reduction from .alpha.-Fe.sub.2 O.sub.3 to Fe.sub.3 O.sub.4 is accelerated by additive Os to achieve a uniform reduction and increase the ratio of magnetic phase in the film. .gamma.-Fe.sub.2 O.sub.3 film medium with Os improved saturation magnetization and increased coercive force in proportion to amount of additive Os. Application of an external field to said film introduces magnetic anisotropy into said film, therefore said film medium improves coercive force and squareness of hysteresis loop by the introduction of anisotropy. .gamma.-Fe.sub.2 O.sub.3 crystal grain is prepared by additive Os to obtain fine grain. The resultant .gamma.-Fe.sub.2 O.sub.3 film medium a decreased noise level.
    • 公开了具有至少一种选自Pd,Au,Pt,Rh,Ag,Ru,Ir和Os的添加剂的γ-Fe 2 O 3膜。 由α-Fe 2 O 3还原成Fe 3 O 4由添加剂Os加速以实现均匀的还原并增加膜中磁相的比例。 具有Os的γ-Fe2O3膜介质改善了饱和磁化强度,并且与添加剂的量成比例地增加矫顽力。 对所述膜施加外部场,将磁各向异性引入所述膜,因此所述膜介质通过引入各向异性而提高矫顽力和磁滞回线的矩形度。 通过添加剂Os制备γ-Fe 2 O 3晶粒以获得细晶粒。 所得的γ-Fe 2 O 3膜介质降低了噪声水平。
    • 3. 发明授权
    • Iron oxide magnetic film and process for fabrication thereof
    • 氧化铁磁性膜及其制造方法
    • US4642245A
    • 1987-02-10
    • US730549
    • 1985-05-06
    • Osamu IshiiFumikatsu YoshimuraIwao Hatakeyama
    • Osamu IshiiFumikatsu YoshimuraIwao Hatakeyama
    • H01F10/18C23C15/00
    • H01F10/18Y10S428/90
    • .gamma.-Fe.sub.2 O.sub.3 film added at least one selected from the group consisting of Pd, Au, Pt, Rh, Ag, Ru, Ir, Os as additive, especially Os are disclosed. Reduction from .alpha.-Fe.sub.2 O.sub.3 to Fe.sub.3 O.sub.4 is accelerated by additive Os to accompany to a uniform reduction and increased the ratio of magnetic phase in the film. .gamma.-Fe.sub.2 O.sub.3 film medium added Os improves the saturation magnetization and increases the coercive force in proportion to amount of additive Os. Application of an external field to said film introduced magnetic anisotropy into said film, therefore said film medium improves coercive force and squareness of hysteresis loop by the grant of anisotropy. .gamma.-Fe.sub.2 O.sub.3 crystal grain is prepared by additive Os to obtained fine grain. The resultant .gamma.-Fe.sub.2 O.sub.3 film medium decreases the noise.
    • 公开了添加了选自Pd,Au,Pt,Rh,Ag,Ru,Ir,Os中的至少一种作为添加剂的γ-Fe 2 O 3膜。 通过添加剂Os可以促进从α-Fe2O3向Fe3O4的还原,从而均匀地还原并增加膜中磁相的比例。 添加的γ-Fe2O3膜介质可以提高饱和磁化强度,并且与添加剂的量成比例地增加矫顽力。 对所述膜施加外部场,将磁各向异性引入所述膜,因此所述膜介质通过赋予各向异性来提高磁滞回线的矫顽力和矩形度。 通过添加剂Os制备γ-Fe 2 O 3晶粒以获得细晶粒。 所得的γ-Fe2O3薄膜介质会降低噪音。