Magneto-optical disk apparatus utilizing a leakage magnetic fiel

Details Magneto-optical disk apparatus utilizing a leakage magnetic fiel Magneto-optical disk apparatus utilizing a leakage magnetic fiel

1995-08-31

1997-04-01

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1100

Patent

active

056173792

ABSTRACT:
A magneto-optical disk is provided wherein a magnetic field generated by a pair of rod-shaped permanent magnets of linear motor mechanisms for moving an optical head leaks to cover an external magnetic field generating device. The rod-shaped permanent magnets are arranged such that the leakage magnetic field is generally parallel with a data recording surface of a magneto-optical disk. In the external magnetic field generating device, the leakage magnetic field causes a permanent magnet to be oriented such that its permanent magnetization is directed parallel to the data recording surface, which is a neutral state. In a recording or erasing operation, a magnetic field reversing coil is energized to cause the permanent magnet to make a quarter rotation (in opposite directions for the recording and erasing operations) from the neutral state so that pole S or N faces the data recording surface.

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Patent Abstracts of Japan, vol. 18, No. 89 (P-1692), Feb. 14, 1994 (JP-A-52-90423).

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