Hitachi, Ltd.

Masao Katsumata

Kazuhiro Momata

Yoshihisa Kamo

Masahiro Kitada

Tooru Takeura

Kazuyoshi Adachi

Hideo Tanabe

Noboru Shimizu

Naoki Sato

Hiroshi Tsuchiya

Kousaku Chida

Toshikane Yoshimatsu

A magnetic recording/reproducing head assembly comprising a first magnetic path forming member on which a coil is mounted, a second magnetic path forming member which forms a magnetic path in cooperation with the first magnetic path forming member, and a film laminate formed at a front gap portion between the first magnetic path forming member and the second magnetic path forming member. The film laminate includes a magnetic detecting element for detecting a change in a magnetic field and a soft magnetic film or films. This magnetic head assembly is prepared by forming the film laminate on a head base of the head assembly, bonding a core member to the head base with the film laminate formed thereon, and mounting a coil on the core member.

Magnetic recording/reproducing head assembly

A magnetoresistive head including a magnetoresistive element in which the magnetoresistive head has a specifically determined gap length and/or the magnetoresistive element has a specifically determined magnetostriction constant to thereby define a reproduction output vs. operation current characteristic curve of the head. The above-mentioned gap length and/or magnetostriction constant is determined such that a saturation operation current for which a reproduction output of the head is maximum is higher than an operation current with which the head is operative.

Magnetoresistive head having controlled reproduction output

The present invention relates to the structure of a magneto-resistive head for reducing the spike noises generated in the head and for increasing the signal to noise ratio when the information is reproduced. In order to achieve the object, an electric conductor layer is disposed at both sides or one side of a magneto-resistive element, and the conductor layer is isolated from the element and connected to a DC potential.

Magneto-resistive head for protecting against output spike noises

A magnetroresistive element formed by laminating a plurality of metallic magnetoresistance effect films having magnetostriction of different signs on a substrate. The magnetoresistive element can be formed to exhibit zero magnetostriction or to exhibit magnetostriction of any desired value. Further, the magnetoresistive element exhibits magnetostriction that changes little with the change in the film composition. The metallic magnetoresistance effect films preferably have positive and negative magnetostriction with an absolute value not greater than 15.times.10.sup.-6.

Magnetoresistive element

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Odawara, Japan

Masao Katsumata