Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1993-04-13
1999-08-03
Letscher, George J.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 539
Patent
active
059332972
ABSTRACT:
A magnetic storage/read system includes a recording medium for magnetically storing a signal and a magnetoresistive element which is driven relative to the recording medium. The magnetoresistive element may include a substrate, a first antiferromagnetic film, a first ferromagnetic film, a first nonmagnetic film, a soft magnetic film, a second nonmagnetic film, a second ferromagnetic film, and a second antiferromagnetic film, wherein the films are sequentially layered directly on the substrate with no intervening layer between any of the films. At least one of the first antiferromagnetic film and the second antiferromagnetic film may be made of nickel oxide. The first ferromagnetic film and the second ferromagnetic film have a first magnetization which is fixed in a predetermined direction, and the soft magnetic film has a second magnetization which is rotatable in response to a magnetic field from the recording medium such that an angle between a direction of the second magnetization and the predetermined direction in which the first magnetization is fixed varies in response to the magnetic field from the recording medium, thereby producing a magnetoresistive effect.
REFERENCES:
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 4881143 (1989-11-01), Bhattacharyya et al.
patent: 4903158 (1990-02-01), Smith
patent: 5021909 (1991-06-01), Shiiba
patent: 5089334 (1992-02-01), Mallary et al.
patent: 5097372 (1992-03-01), Fukazawa et al.
patent: 5159513 (1992-10-01), Dieny et al.
patent: 5168409 (1992-12-01), Koyama et al.
patent: 5206590 (1993-04-01), Dieny et al.
patent: 5218497 (1993-06-01), Tanabe et al.
patent: 5255141 (1993-10-01), Valstyn et al.
patent: 5258884 (1993-11-01), Howard et al.
patent: 5287238 (1994-02-01), Baumgart et al.
C. H. Bajorek et al., "Nonlinear Magnetoresistive Head", IBM Technical Disclosure Bulletin, vol. 16, No. 10, Mar. 1974, pp. 3485-3486.
Patent Abstracts of Japan, vol. 14, No. 292, P-1067, Jun. 26, 1990 (English abstract for Japanese Kokai 2-91807 to Yamamoto et al., Mar. 1990).
C. Tsang et al., "Gigabit Density Recording Using Dual-Element MR/Inductive Heads on Thin-Film Disks", IEEE Trans. on Magnetics, Vol. 26, No. 5, Sep. 1990, pp. 1689-1693.
Arai Reiko
Fukui Hiroshi
Fuyama Moriaki
Hoshiya Hiroyuki
Mitsuoka Katsuya
Hitach, Ltd.
Letscher George J.
LandOfFree
Magnetic storage/read system with read head including magnetores does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic storage/read system with read head including magnetores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic storage/read system with read head including magnetores will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-855079