Low noise magnetic field sensor

Details Low noise magnetic field sensor Low noise magnetic field sensor

2008-05-19

2011-11-29

Cao, Allen (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

08068316

ABSTRACT:
A magnetoresistive sensor including: a first pinned-magnetization magnetic layer and a free-magnetization magnetic layer, separated by first separating layer for magnetic uncoupling. The sensor further includes a second pinned-magnetization magnetic layer, separated from the free-magnetization magnetic layer by a second separating layer for magnetic uncoupling, the first and second separating layers being located on either side of the free-magnetization magnetic layer, and the respective magnetizations of the first pinned-magnetization magnetic layer and of the free-magnetization magnetic layer, in the absence of an external field, are substantially orthogonal. The orientation of the magnetization of the second pinned layer is selectable.

REFERENCES:
patent: 6532164 (2003-03-01), Redon et al.
patent: 6603677 (2003-08-01), Redon et al.
patent: 6888742 (2005-05-01), Nguyen et al.
patent: 7916436 (2011-03-01), Ishizone et al.
patent: 2002/0061421 (2002-05-01), Dieny
patent: 2005/0041342 (2005-02-01), Huai et al.
patent: 2005/0280058 (2005-12-01), Pakala et al.
patent: 2008/0291586 (2008-11-01), Ishizone et al.
patent: 2009/0002898 (2009-01-01), Childress et al.
D. Houssameddine, et al., “Spin-torque oscillator using a perpendicular polarizer and a planar free layer”, Nature Publishing Group, vol. 6, No. 6, XP002479794, ISSN: 1476-1122, Jun. 2007, pp. 447-453.
B. Dieny, “Giant magnetoresistance in spin-valve multilayers”, Journal of Magnetism and Magnetic Materials, vol. 136, (1994), pp. 335-359.
Neil Smith, et al., “White-noise magnetization fluctuations in magnetoresistive heads”, Applied Physics Letters, vol. 78, No. 10, Mar. 5, 2001, pp. 1448-1450.
L. Berger, “Emission of spin waves by a magnetic multilayer traversed by a current”, Physical Review B, vol. 54, No. 13, Oct. 1, 1996, pp. 9353-9358.
J. C. Slonczewski, et al., “Current-driven excitation of magnetic multilayers”, Journal of Magnetism and Magnetic Materials, vol. 159, (1996), pp. L1-L7.
Z. Li, et al., “Magnetization dynamics with a spin-transfer torque”, Physical Review B, vol. 68 , (2003), pp. 024404-1-024404-10.
U.S. Appl. No. 12/123,174, filed May 19, 2008, Dieny.

Affiliated with

Also associated with

Rating

Low noise magnetic field sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low noise magnetic field sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low noise magnetic field sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4294395