Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2006-01-10
2006-01-10
Letscher, George (Department: 2653)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
06985337
ABSTRACT:
Nano-oxide based current-perpendicular-to-plane (CPP) magnetoresistive (MR) sensor stacks are provided, together with methods for forming such stacks. Such stacks have increased resistance and enhanced magnetoresistive properties relative to CPP stacks made entirely of metallic layers. Said enhanced properties are provided by the insertion of magnetic nano-oxide layers between ferromagnetic layers and non-magnetic spacer layers, whereby said nano-oxide layers increase resistance and exhibit spin filtering properties. CPP sensor stacks of various types are provided, all having nano-oxide layers formed therein, including the spin-valve type and the synthetic antiferromagnetic pinned layer spin-valve type. Said stacks can also be formed upon each other to provide laminated stacks of different types.
REFERENCES:
patent: 5650958 (1997-07-01), Gallagher et al.
patent: 5686889 (1997-11-01), Hillis
patent: 5898548 (1999-04-01), Dill et al.
patent: 6111784 (2000-08-01), Nishimura
patent: 6171693 (2001-01-01), Lubitz et al.
patent: 6198609 (2001-03-01), Barr et al.
patent: 2001/0006444 (2001-07-01), Hayakawa et al.
patent: 2004/0160709 (2004-08-01), Lin et al.
K. Nagasaka et al., “Giant magnetroresistance properties of a specular spin valve films in a current perpendicular to plane structure”, Journal of Applied Physics, vol. 89, No. 11, Jun. 1, 2001, pp. 6943-6945.
K. Bussman et al., “CPP Giant Magnetoresistance of NiFeCo/Cul-CoFe/Cu Multilayers,” IEEE Trans. on Magnetics, vol. 34, No. 4, Jul. 1998, pp. 924-926.
J.J.M. Ruigrok et al., Disk recrording beyond 100 Gb/in, squared: Hybrid recording?(invited),Journal of Applied Physics, vol. 87, No. 9, May 1, 2000, pp. 5398-5403.
P. Sensor et al., “Large magnetoresistance in tunnel junctions with omiron oxide electrode,” Applied Physics Letters, vol. 74, No. 26, Jun. 28, 1999, pp. 4017-4019.
Akira Yamase et al., “Band Structure in the High Temperature Phase of Fe3O4,” Journal of the Physical Society of Japan, vol. 53, No. 1, Jan. 1984, pp. 312-317.
Ze Zhang et al., “Electron states, magnetism, and the Verwey transition in magnetite,” Physical Review B, vol. 44, No. 241 Dec. 15, 1991-II, pp. 11 319-13 331.
Dieny Bernard
Horng Cheng
Ju Kochan
Li Min
Liao Simon
Ackelman Stephen B.
Headway Technologies Inc.
Letscher George
Saile George O.
LandOfFree
Multilayered structures comprising magnetic nano-oxide... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multilayered structures comprising magnetic nano-oxide..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multilayered structures comprising magnetic nano-oxide... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3546394