Eraseable self biasing thermal magneto-optic medium

Details Eraseable self biasing thermal magneto-optic medium Eraseable self biasing thermal magneto-optic medium

1985-09-30

1988-12-27

Moffitt, James W.

Static information storage and retrieval

Information masking

Polarization

360 59, 369 13, 369284, 428692, G11C 1306

Patent

active

047945605

ABSTRACT:
A thermally written magnetic data storage medium retains desired domains of magnetization having field orientations representative of the data. A first magnetic layer retains one or more domains of desired magnetic field orientations. A second magnetic layer provides a biasing field for obtaining a predetermined magnetic field orientation in the first magnetic layer as a function of the temperature of the second magnetic layer. Disposed between the first and second layers is a thermal isolation layer which provides a thermal barrier for controlling the temperature of the second magnetic layer means. When the medium is heated for a short time, the fringe field from the first layer causes one direction of magnetic orientation to occur in a domain in the first layer. Upon cooling of the domain, the domain magnetization becomes stable with an orientation conforming to the orientation of the fringe field. The thermal isolation layer prevents significant heating of the second layer. Further heating of the domain to erase, heats the second layer substantially to cause it to project a field of predetermined direction opposite from the fringe field direction such that as cooling occurs, the orientation of the domain magnetization stabilizes and conforms to the projected field orientation.

REFERENCES:
patent: 3651504 (1972-03-01), Goldberg et al.
patent: 3680065 (1972-07-01), Almasi et al.
patent: 3702993 (1972-11-01), Meuhaus et al.
patent: 3710352 (1973-01-01), Smith et al.
patent: 3710353 (1973-01-01), Jacobs et al.
patent: 3739394 (1973-06-01), Becker
patent: 4559573 (1985-12-01), Tanaka et al.
patent: 4586092 (1986-04-01), Martens et al.

Affiliated with

Also associated with

Rating

Eraseable self biasing thermal magneto-optic medium does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Eraseable self biasing thermal magneto-optic medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eraseable self biasing thermal magneto-optic medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-872627