Optical magnetic recording medium and storage device

Details Optical magnetic recording medium and storage device Optical magnetic recording medium and storage device

2005-03-08

2005-03-08

Klimowicz, William (Department: 2653)

Dynamic information storage or retrieval

Storage medium structure

Specified material

Reexamination Certificate

active

06865147

ABSTRACT:
An optical magnetic recording medium in which reproduction is implemented by transcribing a mark to a reproducing layer based on a magnetic field from a recording layer, includes a reproducing layer, a non-magnetic layer, and a recording layer including a first recording layer and a second recording layer, wherein the reproducing layer, the non-magnetic layer, and the recording layer including the first recording layer and the a second recording layer are stacked in this sequence; the regenerating layer has a property of an easy magnetization in an in-plane direction at room temperature; the first recording layer and the second recording layer each has a property of easy magnetization in a vertical direction to the in-plane direction at room temperature in a single layer; and there is a relation of M2<M1wherein a composition of a rare-earth metal comprising the first recording layer is defined as M1(at %) and a composition of a rare-earth metal comprising the second recording layer is defined as M2(at %).

REFERENCES:
patent: 5935701 (1999-08-01), Nishimura
patent: 6633514 (2003-10-01), Awano et al.
patent: 8-106660 (1996-04-01), None
patent: 2000-163817 (2000-06-01), None
patent: 2000-268426 (2000-09-01), None
U.S. Appl. No. 09/880,347, filed Jun. 13, 2001, Hosokawa et al.

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