DWDD-type magneto-optic recording medium including buffer...

Details DWDD-type magneto-optic recording medium including buffer... DWDD-type magneto-optic recording medium including buffer...

2008-07-15

2008-07-15

Bernatz, Kevin M (Department: 1794)

Stock material or miscellaneous articles

Magnetic recording component or stock

Magneto-optical media stock

C369S013420, C369S013430, C369S013550, C204S192300

Reexamination Certificate

active

11003431

ABSTRACT:
A magneto-optic recording medium has a stacked structure composed of a memory layer, a domain wall displacement layer having domain wall-resistant magnetism smaller than the memory layer, and a switching layer having a lower Curie temperature than these layers interposed between these layers. A recording surface of the magneto-optic recording medium is divided into a plurality of tracks of a predetermined track pitch. A domain wall displacement layer has a recording track region limited in a track width direction in a central portion of each track. A magnetized state of a vertically magnetized memory layer is only transferred in the recording track region. A buffer region is magnetically oriented in an in-plane direction at a predetermined temperature or lower and is vertically magnetized at the predetermined temperature or higher.

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