Method of magneto-optically recording and erasing information on

Details Method of magneto-optically recording and erasing information on Method of magneto-optically recording and erasing information on

1989-06-23

1992-04-14

Levy, Stuart S.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 365122, G11B 1304, G11B 1110, G11B 1112

Patent

active

051054000

ABSTRACT:
A method of magneto-optically recording and erasing information which comprises irradiating pulse-like laser beam onto a magneto-optical information storage medium including recording and bias layers which has perpendicular magnetic anisotropy and which are stacked one upon the other to apply coupling interaction which is mainly magnetostatic interaction to each other, and magnetization-reversing temperature of the bias layer being higher than that of the recording layer. When the recording laser beam is irradiated onto the medium, the beam-irradiated portion of the medium is heated to form a reversed magnetic domain in the bias layer, magnetization of the recording layer is reversed by first leakage magnetic field applied to the recording layer when beam-irradiated portion is then cooled, and magnetization of the bias layer is directed in same direction as that under initial state by second leakage magnetic field, applied to the bias layer. When the erasing layer beam is irradiated onto the medium, the beam-irradiated portion of the medium is heated to the magnetization-reversing temperature of the recording layer, and due to third leakage magnetic field applied to the recording layer at this time, the direction of magnetization of the recording layer is re-reversed.

REFERENCES:
patent: 4649519 (1987-03-01), Sun et al.
patent: 4771347 (1988-09-01), Horimai et al.
patent: 4794560 (1988-12-01), Bell et al.
patent: 4799114 (1989-01-01), Tsunashima
patent: 4855975 (1989-08-01), Akasaka et al.

Affiliated with

Also associated with

Rating

Method of magneto-optically recording and erasing information on does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of magneto-optically recording and erasing information on, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of magneto-optically recording and erasing information on will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2354992