Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1996-02-29
1998-07-21
Zimmerman, John J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428694MM, 428694EC, 369 13, G11B 566, G11B 564, G11B 562, G11B 1100
Patent
active
057833001
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.
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Fujii Eiichi
Kasama Nobuhiro
Kawade Hisaaki
Kobayashi Tadashi
Osato Yoichi
Canon Kabushiki Kaisha
LaVilla Michael
Zimmerman John J.
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