Sony Corporation

Hideaki Karamon

Tatsuo Kumura

Hideaki Matsuyama

Hiraku Akiho

Katsumi Sakata

Yukari Utsumi

Hiroya Eguchi

Sadayuki Nishiuchi

Ikuko Sato

Toru Sugai

Toshito Ikeda

Amorphous soft magnetic material

Magnetic head with improved core bonding

A novel soft magnetic amorphous alloy thin film which, on account of the composition of the film consisting in a combination of a transition metal, a metalloid or semiconducting element, namely B, C or Si and an oxide derived from the starting material, is endowed with a comminuted and dispersed structure of a magnetic amorphous phase and a nonmagnetic amorphous phase. The soft magnetic amorphous alloy thin film may be applied to a magnetic head for short wavelength recording which is required to cope with high frequency characteristics and high coercivity of the recording medium.

Soft magnetic thin film

The present invention provides, by combining as the composition of the soft magnetic thin film transition metals and two different kinds of metalloid (semiconductor) elements, herein B, C and Si, a novel amorphous soft magnetic thin film having a structure wherein two phases, namely the ferromagnetic amorphous phase and the non-magnetic amorphous phase and finely dispersed for realizing a soft magnetic thin film that is superior in high frequency characteristics and that may be applied to the magnetic head technology for short wavelength recording that may be advantageously employed with a high coercive force medium.

A composite magnetic head in which a single crystal ferrite is used at the slide contact portion with the magnetic recording medium and a polycrystalline ferrite is used at the portion constituting the back magnetic circuit, is disclosed. An oxide magnetic thin film is formed at the junction interface between the single crystal ferrite and the polycrystalline ferrite for providing a magnetic head free from diffusion at the junction surface and evidencing only a low slide noise level.

Magnetic head including single crystal and polycrystalline ferrites with

Growing community of inventors

Miyagi, Japan

Hideaki Karamon