Integrated magneto-optical having a magnetic head set back from

Details Integrated magneto-optical having a magnetic head set back from Integrated magneto-optical having a magnetic head set back from

1994-03-08

1995-08-08

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 4439, 360 59, 360114, G11B 1100

Patent

active

054405300

ABSTRACT:
An integrated magneto-optical read and write head having a magnetic head set back from an optical head. The integrated magneto-optical head includes an optical subassembly having optical input for receiving optical radiation and an optical output positioned in an output plane. A magnetic subassembly includes a magnetic circuit having at least one polar part PPI placed in a plane perpendicular to the output plane, the polar part PPI exhibition a magnetic pole toward a recording medium. The magnetic pole is set back relative to the output plane of the optical output to reduce the difference between the magnetic coercive field below the optical output and the magnetic pole such that a larger range of magneto-optical materials may be employed in magneto-optical heads.

REFERENCES:
patent: 4796226 (1989-01-01), Valette
patent: 5022018 (1991-06-01), Vogelgesang
patent: 5124961 (1992-06-01), Yamaguchi et al.
patent: 5317800 (1994-06-01), Fedeli et al.

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