Impressing device of bias magnetic field for photomagnetic disk

Abstract

Abstract PURPOSE:To obtain a magnetic core using a semi-hard magnetic material with an easy-to-form structure by bundling plural wires of semi-hard material in the lengthwise direction to form the magnetic core. CONSTITUTION:A magnetic core 30 having a slender magnetic pole surface M is fixed along the entire length D of a data area set in the radius direction of a photomagnetic disk 14. In this case, the surface M about 1mm. space to the disk 14. The semi-hard material of the core 30 has intensive magnetic anisotropy which is set in the direction vertical to the disk 14. A magnetic core 33 is obtained by bundling wires 34, and an accurate mechanical size is required at the areas to be connected to the surface M and a yoke 35. However the size accuracy can be reduced for the area between the surface M and the yoke 35. In this way, easy processing and assembly as a whole are performed.

Inventors

• 👤 Koichi Ogawa
• 👤 小川　紘一
• 👤 Toshitaka Iwamoto
• 👤 岩本　敏孝

Bibliographic Details