Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2006-05-02
2006-05-02
Renner, Craig A. (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
C360S324110, C360S324120
Reexamination Certificate
active
07038889
ABSTRACT:
A dual spin valve giant magnetoresistance (GMR) sensor having two spin valves with the second spin valve being self-biased is disclosed herein. According to the present invention a dual spin valve system is disclosed wherein the first of the two spin valves in the dual spin valve element is pinned through exchange coupling, i.e., a first anti-ferromagnetic pinning layer and a first ferromagnetic pinned layer structure are exchange coupled for pinning the first magnetic moment of the first ferromagnetic pinned layer structure in a first direction. The second of the two spin valves in the dual spin valve system is self-pinned. The self-pinned spin valve does not use any anti-ferromagnetic layers to pin the magnetization of the pinned layers.
REFERENCES:
patent: 5583725 (1996-12-01), Coffey et al.
patent: 5748399 (1998-05-01), Gill
patent: 5768069 (1998-06-01), Mauri
patent: 5825595 (1998-10-01), Gill
patent: 5856897 (1999-01-01), Mauri
patent: 5880913 (1999-03-01), Gill
patent: 5966323 (1999-10-01), Chen et al.
patent: 6111729 (2000-08-01), Kamiguchi et al.
patent: 6153320 (2000-11-01), Parkin
patent: 6175476 (2001-01-01), Huai et al.
patent: 6219208 (2001-04-01), Gill
patent: 6221172 (2001-04-01), Saito et al.
patent: 6317297 (2001-11-01), Tong et al.
patent: 6650509 (2003-11-01), Gill
patent: 6741432 (2004-05-01), Pinarbasi
patent: 6781798 (2004-08-01), Gill
patent: 6785102 (2004-08-01), Freitag et al.
patent: 2000-040211 (2000-02-01), None
Zhu, J.G. “Spin Valve and Dual Spin Valve Heads with Synthetic Antiferromagnets,” IEEE Transactions on Magnetics, vol. 35, No. 2, Mar. 1999, pp. 655-660.
Zhu, J.G. et al. “Micromagnetics of Dual Spin Valve GMR Heads,” J. Appl. Physics, vol. 79, No. 8, Part 2B, Apr. 1996, pp. 5886-5888.
Gill, “Dual Spin Valve Sensor Without AFM Pinning,” U.S. Appl. No. 09/813,609 filed Mar. 20, 2001.
Freitag James Mac
Gill Hardayal Singh
Pinarbasi Mustafa
Chambliss Bahner & Stophel P.C.
Lynch David W.
Renner Craig A.
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