Magnetoresistive structures and fabrication methods

Details Magnetoresistive structures and fabrication methods Magnetoresistive structures and fabrication methods

2005-04-22

2008-10-28

Klimowicz, William J. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S324100, C360S324110

Reexamination Certificate

active

07443638

ABSTRACT:
Disclosed herein is a magnetoresistive structure, for example useful as a spin-valve or GMR stack in a magnetic sensor, and a fabrication method thereof. The magnetoresistive structure uses twisted coupling to induce a perpendicular magnetization alignment between the free layer and the pinned layer. Ferromagnetic layers of the free and pinned layers are exchange-coupled using antiferromagnetic layers having substantially parallel exchange-biasing directions. Thus, embodiments can be realized that have antiferromagnetic layers formed of a same material and/or having a same blocking temperature. At least one of the free and pinned layers further includes a second ferromagnetic layer and an insulating layer, such as a NOL, between the two ferromagnetic layers. The insulating layer causes twisted coupling between the two ferromagnetic layers, rotating the magnetization direction of one 90 degrees relative to the magnetization direction of the other.

REFERENCES:
patent: 5650958 (1997-07-01), Gallagher et al.
patent: 6166948 (2000-12-01), Parkin et al.
patent: 6259586 (2001-07-01), Gill
patent: 6400536 (2002-06-01), Gill
patent: 6438026 (2002-08-01), Gillies et al.
patent: 6600638 (2003-07-01), Gill
patent: 6606219 (2003-08-01), Lam
patent: 6636393 (2003-10-01), Araki et al.
patent: 6650513 (2003-11-01), Fullerton et al.
patent: 6657828 (2003-12-01), Araki et al.
patent: 6721146 (2004-04-01), Beach
patent: 6728083 (2004-04-01), Pinarbasi
patent: 6756135 (2004-06-01), Hasegawa et al.
patent: 6791792 (2004-09-01), Takahashi
patent: 7038894 (2006-05-01), Inomata et al.
patent: 7106561 (2006-09-01), Carey et al.
patent: 7187576 (2007-03-01), Braun et al.
patent: 7199984 (2007-04-01), Carey et al.
patent: 2002/0048127 (2002-04-01), Fukuzawa et al.
patent: 2003/0002231 (2003-01-01), Dee
patent: 2003/0039062 (2003-02-01), Takahasahi
patent: 2003/0179518 (2003-09-01), Gill
patent: 2004/0004261 (2004-01-01), Takahasahi et al.
patent: 2004/0085683 (2004-05-01), Lin et al.
patent: 2004/0114280 (2004-06-01), Yoshikawa et al.
patent: 2005/0207070 (2005-09-01), Carey et al.
patent: 2005/0207073 (2005-09-01), Carey et al.
patent: 2006/0044707 (2006-03-01), Araki et al.
patent: 2006/0202244 (2006-09-01), Ju et al.
patent: 2006/0221509 (2006-10-01), Carey et al.
patent: 08264861 (1996-10-01), None
Lai et al. “Biquadratic coupling through nano-oxide layers in pinned layers of IrMn-based spin valves,” Nov. 15, 2002, Journal of Applied Physics, vol. 93, No. 10, pp. 8412-8414).

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