Magnetic head

Details Magnetic head Magnetic head

1997-11-25

1999-09-07

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428694R, 428694T, 428694TS, 428694TM, 428900, 360113, 360119, 360120, 360126, G11B 566

Patent

active

059485540

ABSTRACT:
The ZnO amount contained in the ferrite is lowered more than those of conventional ones to increase the mean coefficient of thermal expansion of the ferrite. Thus, a difference between the mean coefficient of thermal expansion of the ferrite and the mean coefficient of thermal expansion of the soft magnetic material is reduced. Further, the Fe.sub.2 O.sub.3 amount contained in the ferrite is suitably controlled to reduce the absolute value of the magnetocrystalline anisotropic energy K1 and the absolute value of the saturation magnetostriction .lambda.S. Thus, the absolute value of the apparent magnetic anisotropic energy is lowered, and the magnetic anisotropy is weakened. The magnetic permeability and the head output can be elevated in a high frequency region by lowering the magnetic anisotropy.

REFERENCES:
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patent: 5117321 (1992-05-01), Nakanishi et al.
patent: 5218500 (1993-06-01), Okuda et al.
patent: 5270894 (1993-12-01), Okuda et al.
patent: 5278716 (1994-01-01), Okuda et al.
patent: 5515222 (1996-05-01), Kumagai et al.
patent: 5585984 (1996-12-01), Hasegawe

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