Kabushiki Kaisha Toshiba

Toshiba Machine Co., Ltd.

National Research Institute for Metals

Ei Nakamura

Mitsuo Sasaki

Hiromi Nakamura

Yutaka Yamada

Kyoji Tachikawa

Satoru Murase

Hiroaki Kumakura

Kazumasa Togano

Nakamura Hiromi

A member is prepared by forming a magnetic surface layer on a magnetic base member having a different composition from the surface layer. A laser beam is radiated onto the member so as to fuse the member and the surface layer, thereby forming a fused portion having magnetic properties. A modified portion is formed in a portion of the fused portion corresponding to the surface layer such that this portion has different permeability from other portions of the surface layer.

Magnetic recording member

Method of forming modified portion and magnetic recording member using

Method of forming a magnetically modified portion

A powder having a predetermined composition is filled in a tube. The tube is drawn to obtain a wire and the wire is rolled to obtain a tape-like starting body. Then, a laser beam is irradiated on the part of the tape to heat and melt the part of the tape. The starting body is rapidly heated and then cooled, thereby the part of the starting body is melted and solidified to form a compound superconductor layer.

Method of manufacturing compound superconductors

Growing community of inventors

Yokosuka, Japan

Ei Nakamura