Method for producing a magnetooptical recording medium

Details Method for producing a magnetooptical recording medium Method for producing a magnetooptical recording medium

1994-08-26

1996-06-11

Pianalto, Bernard

Coating processes

Direct application of electrical, magnetic, wave, or...

Pretreatment of substrate or post-treatment of coated substrate

427130, 427131, 427166, 4272557, 427294, 427343, 427350, 427402, H05H 100

Patent

active

055253784

ABSTRACT:
A magnetooptical recording medium provided with a first magnetic layer and a second magnetic layer having a higher Curie point and a lower coercive force than the first magnetic layer and being exchange coupled with the first magnetic layer satisfies the relation: ##EQU1## wherein H.sub.H is the coercive force of the first magnetic layer; H.sub.L is the coercive force of the second magnetic layer; M.sub.s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and .sigma..sub.w is the magnetic wall energy between the first and second magnetic layers.

REFERENCES:
patent: 3521294 (1970-07-01), Treves
patent: 4059828 (1977-11-01), Kobayashi et al.
patent: 4126492 (1978-11-01), Imamura et al.
patent: 4198692 (1980-04-01), Kobayashi et al.
patent: 4556291 (1985-12-01), Chen
patent: 4612587 (1986-09-01), Kaneko et al.
patent: 4628485 (1986-12-01), Tanaka et al.
patent: 4645722 (1987-02-01), Katayama et al.
patent: 4701881 (1987-10-01), Tanaka et al.
patent: 4771347 (1988-09-01), Horimai et al.
patent: 4807204 (1989-07-01), Mizutani
patent: 4871614 (1989-10-01), Kobayashi
patent: 4922454 (1990-05-01), Taki
patent: 4932012 (1990-06-01), Kobayashi
patent: 4955007 (1990-09-01), Aratami et al.
patent: 5132945 (1992-07-01), Osato et al.
patent: 5163031 (1992-11-01), Osato
Nippon Kogaku K.K., "Overwrite System of Mag. Op. Disk Sys." Inter Symposium on MAG. Op. Apr. 1987, 7 pages.
Kobayashi, et al., Japanese Journal of Applied Physics, vol. 20, No. 11 (Nov. 1981), pp. 2089-2095.
Mizutani, Japanese Patent Abstract, vol. 9, No. 86 (Apr. 16, 1985), p. 349.
Mizutani, Japanese Patent Abstract, vol. 9, No. 86 (p. 349); (no date avail.).
Tanaka, Japanese Patent Abstract, vol. 6, No. 34, (p. 104); (no date avail).
Tsumashima et al., IEEE Trans. on Mag., vol. MAG 17, No. 6, Nov. 1981, pp. 2840-2842.

Affiliated with

Also associated with

Rating

Method for producing a magnetooptical recording 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 Method for producing a magnetooptical recording medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing a magnetooptical recording medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-350481