MDCP: Patent Abstact US04910622: Over write capable magnetooptical recording medium

US04910622 Over write capable magnetooptical recording medium

Assignee Nikon Corporation

Assign./Filed March 20, 1990/ May 10, 1988

Inventors Saito; Jun, Sato; Masatoshi, Matsumoto; Hiroyuki

Summary Magnetic overwrite system in which 2 bits can be stored per magnetic domain.

Abstract Over Write Capable Magnetooptical Recording Medium, Recording Method and Apparatus Using the Same. The recording medium in which the direction of an initial field Hini. is the same as that of a bias field Hb (Classes 1, 2, and 8 in Table 1), and which satisfies predetermined formulas can allow an over-write operation if a jointing field Hjoint. is used which continuously changes from the initial field Hini. to the bias field Hb.

US04910622	Over write capable magnetooptical recording medium
Assignee	Nikon Corporation
Assign./Filed	March 20, 1990/ May 10, 1988
Inventors	Saito; Jun, Sato; Masatoshi, Matsumoto; Hiroyuki
Summary	Magnetic overwrite system in which 2 bits can be stored per magnetic domain.
Abstract	Over Write Capable Magnetooptical Recording Medium, Recording Method and Apparatus Using the Same. The recording medium in which the direction of an initial field Hini. is the same as that of a bias field Hb (Classes 1, 2, and 8 in Table 1), and which satisfies predetermined formulas can allow an over-write operation if a jointing field Hjoint. is used which continuously changes from the initial field Hini. to the bias field Hb.