| 摘要 |
PURPOSE:To prevent deterioration of initial permeability, by inducing a magnetic anisotropy having a component perpendicular to a core face and oriented in an optional direction to the vicinity of the magnetic gap of an amorphous magnetic head core. CONSTITUTION:A head core is formed by piling up several amorphous magnetic thin films 1 on a nonmagnetic base plate 4 by vapor deposition with nonmagnetic insulating layers 2 of several thousand Angstrom in thickness between each of the thin film 1 by using a film thickness (namely, below the surface skin depth) which is determined by sufficiently considering the magnetic field surface skin depth at a using frequency as a unit thickness. Then the whole body of the head core thus formed is heat-treated at a temperature which is lower than the crystallization temperature of the amorphous substance in a static magnetic field 3 (approx. 500Oe) from the vertical direction to the head core face. Therefore, the frequency characteristic of the initial permeability in a core face which is always perpendicular to the static magnetic field becomes such one that the resonant frequency is extended toward the higher frequency side by an induced anisotropy.
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