Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1994-07-01
1997-09-09
Kiliman, Leszek
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428336, 428669, 428678, 428672, 428673, 428675, 428694EC, 428694MM, 428694SC, 428694LE, 428694DE, 428694NF, 428694RE, 428694RL, 428900, 369 13, G11B 566, B32B 516
Patent
active
056654685
ABSTRACT:
A magneto-optical recording medium in which direct overwriting can be done by only modifying the power level and/or the pulse width of applied optical pulses, and without changing the direction of the bias magnetic field. The recording layer comprises first and second magnetic recording layers. The first magnetic layer is a rare-earth transition metal-amorphous alloy and has a perpendicular easy magnetization axis, a thickness of 10 to 200 nm, and a compensation temperature above room temperature. The second magnetic layer comprises an alloy of a first component of Co and/or Fe and a second component of a rare earth metal and/or a noble metal or an alloy of Co and at least one metal selected from Ti, Cr, Mn, Cu, Zn, Ga and Ge. The second magnetic layer is a material having an in-plane easy magnetization axis such that it has a magnetization axis parallel to the second magnetic layer if formed independently on a dielectric layer, the second magnetic layer having a thickness of not more than 3 nm.
REFERENCES:
patent: 4801499 (1989-01-01), Aoyama et al.
patent: 5089358 (1992-02-01), Takr et al.
The Dependence of Direct Overwrite Characteristics . . . , and The Magnetization Process in RE-TM Alloys Studied Using The Extra. Hall Effect (Abstracts), J. Appl. Phys. vol. 69, No. 8 (1991) 4967.
Performance of Magneto-optical Recording Media with Direct Overwrite Capability, J. Appl. Phys. vol. 63, No. 8 (1988) 3844.
Operating Margins for Magneto-Optic Recording Materials with Direct Overwrite Capability, IEEE Trans. Magn. vol. 23, No. 1 (1987) 171.
Magneto-optic Recording Materials with Direct Overwrite Capability, Appl. Phys, Lett. vol. 49, No. 8 (1986) 473.
The Erase Process in Direct Overwrite Magneto-optic Recording, IEEE Tran. Magn. vol. 25, No. 5 (1989) 3530.
Gambino et al. "Exchange Coupled CoPd/TbCo Mo-Storage Films-IEEE Trans. Magnetics", vol. 25, No. 5; Sep. 1989, pp. 3749-3751.
Chiba Kiyoshi
Horiguchi Tohru
Sekiya Masahiko
Kiliman Leszek
Teijin Limited
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