Current-perpendicular-to-the-plane (CPP) magnetoresistive...

Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07551409

ABSTRACT:
A current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor has an improved free layer structure that includes a first ferromagnetic interface layer on the sensor's nonmagnetic spacer layer, a first electrically conductive interlayer on the first interface layer, a central ferromagnetic NiFe alloy free layer on the first interlayer, a second electrically conductive interlayer on the central free layer, and a second ferromagnetic interface layer on the second interlayer. The first ferromagnetic interface layer, central ferromagnetic free layer, and second ferromagnetic interface layer are ferromagnetically coupled together across the electrically conductive interlayers so their magnetization directions remain parallel. The free layer structure may be used in single or dual CPP sensors and in spin-valve or tunneling MR sensors.

REFERENCES:
patent: 5465185 (1995-11-01), Heim et al.
patent: 6466419 (2002-10-01), Mao
patent: 7483245 (2009-01-01), Kamiguchi et al.
patent: 2001/0028537 (2001-10-01), Gill
patent: 2002/0126428 (2002-09-01), Gill
patent: 2002/0191348 (2002-12-01), Hasegawa et al.
patent: 2004/0075953 (2004-04-01), Gill
patent: 2004/0218311 (2004-11-01), Saito et al.
patent: 2004/0246634 (2004-12-01), Yuasa et al.
patent: 2005/0083613 (2005-04-01), Yoshikawa et al.
patent: 2005/0094322 (2005-05-01), Fukuzawa et al.
patent: 2006/0262460 (2006-11-01), Ide et al.
Tanaka et al., “Spin-valve heads in the current-perpendicular-to-plane mode for ultrahigh-density recording”, IEEE Transactions on Magnetics, 38 (1):84-88 Part 1 Jan. 2002.
Childress et al., “Dual current-perpendicular-to-plane giant magnetoresistive sensors for magnetic recording heads with reduced sensitivity to spin-torque-induced noise”, J. Appl. Phys. vol. 99, 08S305, 2006.
Zhu et al., “Spin transfer induced noise in CPP read heads,” IEEE Transactions on Magnetics, vol. 40, No. 1, Jan. 2004, pp. 182-188.
Smith et al., “Angular Dependence of Spin Torque Critical Currents for CPP-GMR Read Heads”, IEEE Transactions on Magentics, vol. 41, No. 10, Oct. 2005, pp. 2935-2940.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Current-perpendicular-to-the-plane (CPP) magnetoresistive... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Current-perpendicular-to-the-plane (CPP) magnetoresistive..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current-perpendicular-to-the-plane (CPP) magnetoresistive... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4145288

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.