G - Physics – 11 – B
Patent
G - Physics
11
B
352/29.02, 352/2
G11B 13/04 (2006.01) G11B 11/105 (2006.01)
Patent
CA 1280207
ABSTRACT OF THE DISCLOSURE A device for producing a high frequency modulating magnetic field is disclosed. The device is especially useful to achieve real-time overwriting in magneto-optical recording. The device produces magnetic field modulated according to a signal to be recorded on a magneto-optical recording medium in which the signal is recorded in the form of magnetization direction on the magneto-optical recording medium under irradiation of a laser beam to raise the temperature of the medium. The device comprises a main magnetic pole formed of a low-loss soft magnetic material and having one end facing to the magneto-optical recording medium and a sheathed conductor wound around the main magnetic pole and consisting of a parallel connection of a plurality of insulated elementary wires.
527570
Aso Koichi
Hayakawa Masatoshi
Nagaki Takehiro
Yamanoi Hiroshi
Gowling Lafleur Henderson Llp
Sony Corporation
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