Magneto-optic recording and reproducing apparatus including a mu

Details Magneto-optic recording and reproducing apparatus including a mu Magneto-optic recording and reproducing apparatus including a mu

1988-03-31

1991-06-18

Levy, Stuart S.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 360 59, G11B 1304

Patent

active

050254308

ABSTRACT:
A magneto-optic recording a reproducing apparatus including a magneto-optic information-carrying medium having three magnetic layers. A magnetic bias field is generatedd by a third layer which is premagnetized in the direction parallel to the thickness thereof. A second layer is magnetized by a magnetizing unit. The laser beam incident on the layers is controlled to three intensities for writing and reading information.

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IBM Technical Disclosure Bulletin, vol. 10, No. 2, Jul. 1967, New York, U.S., pp. 144-145; J. S. Judge et al.; Magnetic Memory Device Utilizing Coupled Film.
"Single Beam Over Write Method Using Multilayered Magneto Optical Media", 28p-ZL-3, Extended Abstracts (The 34th Spring Meeting, 1987); The Japan Society of Applied Physics and Related Societies; Published on Mar. 28, 1987.

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