Sharp Kabushiki Kaisha Corporation

Tetsurou Muramatsu

Tatsushi Yamamoto

Kenji Ohta

Akira Takahashi

Toshio Ishikawa

Junichiro Nakayama

Toshiyuki Tanaka

Mitsuhiko Yoshikawa

Kumio Nago

Tomoyuki Sagara

Masaru Kadono

Renzaburou Miki

A method of adjusting position of a member including an adjustable portion made of material having shape memory effect, comprising the steps of: (a) heat-treating for shape memory the member in a first shape such that the first shape is memorized in the adjustable portion; (b) plastically deforming the adjustable portion to a second shape after cooling the adjustable portion to less than a shape recovery temperature; and (c) locally heating the adjustable portion to more than the shape recovery temperature so as to subject the adjustable portion to local shape recovery.

Positionally adjustable member and applications therefor

A magneto-optical recording/reproducing device which records information by irradiating a light beam of constant intensity on a magneto-optical recording medium while simultaneously applying a magnetic field thereon through a recording magnetic head; and which reproduces the recorded information through a reproducing magnetic head. The magneto-optical recording medium has a magnetic film formed on a translucent substrate and the magnetic field applied through the recording magnetic head reverses in response to the information to be recorded. The recording magnetic head and the reproducing magnetic head are integrally provided on a single magnetic core in order set their positions easily with respect to each other. By making a magnetic core end-face of the reproducing magnetic head smaller than a light beam spot, information recorded on areas smaller than the light beam spot can be reproduced. A large reproduced output may be achieved by using a magneto-optical recording medium which has a soft magnetic material layer made of soft magnetic material provided between the substrate and the magnetic film.

Magneto-optical recording and reproducing device having integrally

A magnetic storage device and a manufacturing method thereof, the magnetic storage device having grooves formed on a substrate, each of the grooves having a magnetic film formed therein. Since the magnetic head does not contact directly with the magnetic film, reliability of the magnetic disk increases. Moreover, the reproduced output of the magnetic head increases since the space between the magnetic head and the magnetic disk can be reduced. Accordingly, high-density recording becomes possible.

Magnetic storage device and manufacturing method thereof

A magneto-optical recording/reproducing device which records information by irradiating a light beam of constant intensity on a magneto-optical recording medium while simultaneously applying a magnetic field thereon through a recording magnetic head; and which reproduces the recorded information through a reproducing magnetic head. The magneto-optical recording medium has a magnetic film formed on a translucent substrate and the magnetic field applied through the recording magnetic head reverses in response to the information to be recorded. The recording magnetic head and the reproducing magnetic head are integrally provided on a single magnetic core in order to set their positions easily with respect to each other. By making a magnetic core end-face of the reproducing magnetic head smaller than a light beam spot, information recorded on areas smaller than the light beam spot can be reproduced. A large reproduced output may be achieved by using a magneto-optical recording medium which has a soft magnetic material layer made of soft magnetic material provided between the substrate and the magnetic film.

Disclosed is a magnetic head core material having very high corrosion resistance even under severe conditions and a method for preparing the same. The material consists of 3 to 6 wt % of aluminum, 7 to 12 wt % of silicon, not more than 3 wt % of chromium and the substantial balance being iron.

Growing community of inventors

Nara, Japan

Tetsurou Muramatsu