Giant magnetoresistive information recording medium, and associa

Details Giant magnetoresistive information recording medium, and associa Giant magnetoresistive information recording medium, and associa

1995-12-08

1998-12-01

Thomas, Tom

Dynamic magnetic information storage or retrieval

Head

Hall effect

360 55, 338 32R, G11B 502, G11B 5127, G11B 533, H01L 4300

Patent

active

058447555

ABSTRACT:
Information is recorded by applying weak and strong magnetic fields to a giant magnetoresistive medium having a pair of ferromagnetic layers, a nonmagnetic interlayer, and an antiferromagnetic layer. The medium preferably has a magnesium-oxide base layer, and may also have an electrode layer. The weak magnetic field magnetizes the ferromagnetic layers in the antiparallel state. The strong magnetic field magnetizes the ferromagnetic layers in the parallel state, which has lower electrical resistance than the antiparallel state. The recorded information is reproduced by detecting the electrical resistance of the medium, either between two electrodes contacting the surface of the medium, or between the electrode layer in the medium and an electrode contacting the surface of the medium.

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Yano et al, The Japan Society for Precision Engineering, "Hikari to Jiki no Kiroku Gitutsu" (Optical and Magnetic Recording Technology) Ohm (1992), Chapt. 2, pp. 11-14.

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