Hitachi Metals, Ltd.

Hitachi, Ltd.

Shigekazu Suwabe

Toshikazu Nishiyama

Yoshihito Yoshizawa

Kiyotaka Yamauchi

Yoshio Bizen

Satoshi Shigematsu

Ryo Goto

Yasunari Tajima

Kazumi Noguchi

Tadashi Shinohara

Hitoshi Iwata

Shizuyo Ueda

Shin Noguchi

Fujio Tsuneda

A spin valve magnetic head, providing on a substrate, a laminated structure that has an antiferromagnetic layer, fixation layer, non-magnetic layer and unconstraint layer, and having a first underlayer of Ta, a second underlayer of NiFeCr and a third underlayer of NiFe, which underlayers are interposed between the substrate and the laminated structure.

Spin valve magnetic head with three underlayers

A magnetic head with low non-linear transition shift, excellent recording capability at high-frequency bands and good reproduction efficiency is disclosed. A second metallic magnetic layer of an FeMN system (M : at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta and Cr) is formed on the surface facing the gap of the leading-side magnetic core of the magnetic head. On the surface facing the gap of the trailing-side magnetic core of the magnetic head provided is a first metallic magnetic layer of an FeMN system (M : at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta and Cr) having a higher saturation magnetic flux density than the second metallic magnetic layer. These two cores are butted against each other via a non-magnetic material and bonded with bonding glass.

Magnetic head with low non-linear transition shift

There is provided according to the present invention a magnetic alloy with ultrafine crystal grains having a composition represented by the general formula:

Magnetic alloy with ultrafine crystal grains and method of producing same

A magnetic alloy with ultrafine crystal grains having a composition represented by the general formula:

Soft magnetic alloy with ultrafine crystal grains and method of

A flying-type composite magnetic head comprising a slider made of a non-magnetic ceramic and having side rails extending longitudinally on both lateral sides of the head; a slit extending longitudinally in one of the side rails; and a magnetic core. The magnetic core is constituted by a pair of core pieces bonded to each other with a first glass layer and fixed in the slit of the slider with a second glass layer on both sides of the magnetic core. The core pieces have flat opposing surfaces parallel to each other for defining a magnetic gap with at least one of the opposing surfaces formed with an Fe-Al-Si thin layer. The magnetic core is provided in its track surface with a notch for restricting a track width, the notch having a depth equal to or greater than the depth of the magnetic gap, and the remaining thickness of the first glass layer bonding the magnetic core pieces being equal to or greater than the thickness of the magnetic core.

Flying-type composite magnetic head

A magnetic head having at least one magnetic gap in its magnetic path, which comprises an Fe-base solf magnetic alloy layer in the magnetic path, at least 50% of the structure of said alloy layer consisting of fine crystalline particles having a body-centered cubic structure and an average particle size of 500 .ANG. or less.

Growing community of inventors

Kumagaya, Japan

Shigekazu Suwabe