Magneto-optical recording medium and signal reproduction method

Details Magneto-optical recording medium and signal reproduction method Magneto-optical recording medium and signal reproduction method

2006-06-13

2006-06-13

Bernatz, Kevin M. (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Magneto-optical media stock

C428S820500, C428S820600, C369S013460, C369S013470

Reexamination Certificate

active

07060373

ABSTRACT:
A magneto-optical recording medium includes a first magnetic layer (reproduction layer), a second magnetic layer (control layer), a third magnetic layer (blocking layer), and a fourth magnetic layer (recording layer) having respective Curie temperatures TC1, TC2, TC3and TC4. The Curie temperatures of the layers satisfy the relationships TC1>TC3>TC2and TC4>TC3. In addition, the magnetic anisotropy of the third magnetic layer Ku3is greater than that of the second magnetic layer Ku2. A magnetic domain wall in the first magnetic layer in front of the spot irradiated by the reproduction light in the direction of travel is displaced toward the peak temperature portion so that a recorded domain is expanded. Displacement in the spot direction of a domain wall in the first magnetic layer behind the reproduction light spot in the direction of travel is suppressed. The second and third magnetic layers control the magnetic exchange coupling between the first and fourth magnetic layers.

REFERENCES:
patent: 6197440 (2001-03-01), Shiratori
patent: 6572957 (2003-06-01), Aratani
patent: 6707766 (2004-03-01), Mori et al.
patent: 6770387 (2004-08-01), Tanaka et al.
patent: 6894954 (2005-05-01), Aoki
patent: 6949302 (2005-09-01), Iwata et al.

Affiliated with

Also associated with

Rating

Magneto-optical recording medium and signal reproduction method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magneto-optical recording medium and signal reproduction method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optical recording medium and signal reproduction method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3679529