| 摘要 |
PURPOSE:To improve the reproduction sensitivity of a reproducing head which uses a magneto-resistance effect element and to reduce the thickness of a magnetic shield film by forming the magnetic thin shield film of three-component amorphous alloy which consists essentially of Co and contains small amounts of Zr and Nb. CONSTITUTION:The 1st magnetic thin shield film 3 and the 2nd magnetic thin shield film 7 are formed on a nonmagnetic material substrate 1 by using three- component amorphous alloy which consists essentially of Co and contains Zr and Nb by about 5-20 total wt% while the content of Zr is about <=2.5wt%. The magnetic shield films 3 and 7 are formed by sputtering and then heat- treated in a rotating magnetic field to have a hard magnetization axis in the magnetic path direction of the magnetic thin shield films, reducing an anisotropic magnetic field. Thus, the magnetic permeability and saturation density of the shield films 3 and 7 are increased to obtain a reproducing head which has large shield effect. |
