Matsushita Electric Industrial Co., Ltd.

Tohru Hori

Kenichi Fujii

Ken Takahashi

Masaki Aoki

Hideaki Komoda

Tomi Sato

Akihiro Ashida

A method for manufacturing a magnetic head of a metal-in-gap type in which a soft magnetic film is provided in a gap of a ferrite core comprising the steps of: forming a first layer comprising a metallic magnetic film containing nitrogen on magnetic ferrite; forming a second layer comprising a metallic magnetic film containing nitrogen in an amount less than said first layer; and forming a third layer comprising a metallic magnetic film containing nitrogen in an amount more than said second layer.

Method for manufacturing magnetic head

In a soft-magnetic thin film, layers of iron carbide are laminated alternately with layers of at least one of iron, iron nitride and iron carbon-nitride and when needed, layers of non-magnetic material. The thin film provides particular features including 1) saturation magnetic flux density of at least 1.5 teslas; 2) relative permeability and coercive force greater than those of the conventional soft-magnetic material; and 3) durability for practical use.

Soft magnetic thin film comprising alternate layers of iron carbide with

A magnetic recording medium essentially composed of a substrate and a ferromagnetic thin film deposited on the surface of the substrate is provided herein. This ferromagnetic film is such as to have a minimum of 400 Oe of coercive force and composed mainly of an iron carbide. According to this construction, the magnetic characteristics are greatly improved.

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Ikoma, Japan

Tohru Hori