Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1993-11-12
1994-10-04
Nguyen, Hoa T.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, 360 59, G11B 1304, G11B 1110, G11B 1112
Patent
active
053532686
ABSTRACT:
A thermomagnetic recording system achieves high areal bit density by combining the high linear bit density of magnetic recording and the high track density typical of magneto-optic recording. The system employs a medium which comprises a ferrimagnetic recording material having a compensation temperature approximately equal to ambient operating temperature, yet small coercivity and high saturation magnetization at elevated temperatures. A source of heat (preferably a laser) controls the magnetic properties of the material. Data is recorded and played back with high performance magnetic recording heads, producing direct overwrite capability, at temperatures less than the Curie point of the material.
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Griswold Gary L.
Kirn Walter N.
Levinson Eric D.
Minnesota Mining and Manufacturing Company
Nguyen Hoa T.
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