Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1993-01-05
1994-07-12
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 539
Patent
active
053294130
ABSTRACT:
A magnetoresistance sensor of this invention is designed to detect a magnetic field on the basis of a change in electric resistance of a magnetoresistance layer, and includes a substrate, the magnetoresistance layer, a magnetization stabilizing layer for stabilizing magnetization of the magnetoresistance layer, and an electrical conductive layer formed on the magnetoresistance layer or the magnetization stabilizing layer. The sensor is characterized in that the magnetoresistance layer and the magnetization stabilizing layer are stacked on each other such that the layers are magnetically coupled to each other at their two end regions with an exchange coupling force higher than that at the remaining region. With this arrangement, there is provided a magnetoresistance sensor having high sensitivity, which can apply a desired bias magnetic field to the MR layer while preventing the bias magnetic field from being disturbed by a magnetic field from a magnetic recording medium or the like.
REFERENCES:
patent: 3840898 (1974-10-01), Bajorek et al.
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 4785366 (1988-11-01), Krounbi
patent: 5005096 (1991-04-01), Krounbi et al.
IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, C. Tsang, pp. 3692-3694, "Unshielded MR Elements with Patterned Exchange-Biasing".
Journal of Applied Physics, 69(8), 15, 1991, B. Dieny, et al., pp. 4774-4779, "Magnetotransport Properities of Magnetically Soft . . . ".
Physical Review B, vol. 45, No. 2, 1992, B. Dieny, et al., pp. 806-813, "Giant Magnetoresistance of Magnetically Soft Sandwiches . . . ".
IEEE Transactions on Magnetics, vol. MAG-20, No. 5, Sep. 1984, A. V. Pohm, et al., pp. 863-865, "Magnetization in Minimum Geometry M-R Heads with Multilayer Films".
Akiyama Junichi
Iwasaki Hitoshi
Kondoh Reiko
Ohsawa Yuichi
Ohta Toshihiko
Heinz A. J.
Kabushiki Kaisha Toshiba
LandOfFree
Magnetoresistance sensor magnetically coupled with high-coercive does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetoresistance sensor magnetically coupled with high-coercive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetoresistance sensor magnetically coupled with high-coercive will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-401149