Coating processes – Magnetic base or coating – Magnetic coating
Patent
1995-04-14
1995-12-19
Pianalto, Bernard
Coating processes
Magnetic base or coating
Magnetic coating
427131, 427132, 4273767, 427404, B05D 512
Patent
active
054766800
ABSTRACT:
A magnetoresistive read sensor incorporates a granular multilayer sensing element comprising a plurality of layers of generally flat particles of a ferromagnetic material embedded in a nonmagnetic electrically conductive material. A bias layer separated from the magnetoresistive sensing element by a spacer layer provides a magnetic field to bias the magnetoresistive sensing element at a desired non-signal point. The ferromagnetic and the nonmagnetic materials are mutually immiscible, or may be miscible or partially miscible and processed in a manner to control interdiffusion. The magnetoresistive sensing element is formed by alternatively despositing layers of ferromagnetic material and layers of nonmagnetic conductive material on a substrate and then annealing the structure. During the annealing cycle, the layers of nonmagnetic material above and below the ferromagnetic layers penetrate at grain boundaries and break the continuity of the ferromagnetic layers to form layers or planes of ferromagnetic particles embedded in a matrix of nonmagnetic material.
REFERENCES:
patent: 4879619 (1989-11-01), Fontana et al.
patent: 4896235 (1990-01-01), Takino et al.
patent: 4949039 (1990-08-01), Grunberg
patent: 5005096 (1991-04-01), Krounbi et al.
patent: 5159513 (1992-10-01), Dieny et al.
D. A. Thompson et al., "Thin Film Magnetoresistors in Memory, Storage, and Related Application", IEEE Transactions on Magnetics, vol., Mag-11, No. 4, Jul. 1975, pp. 1039-1050.
H. Suyama et al., "Thin Film MR Head For High Density Rigid Disk Drive", IEEE Transacions on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 2612-2614.
John Q. Xiao et al., "Giant Magnetoresistance in Nonmultilayer Magnetic Systems", Physical Review Letters, vol. 68, No. 25, Jun. 22, 1992, pp. 3749-3752.
A. E. Berkowitz et al., "Giant Magnetoresistance in Heterogeneous Cu-Co Alloys", Physical Review Letters, vol. 68, No. 25, Jun. 22, 1992, pp. 3745-3748.
J. A. Barnard et al., "`Giant` magnetoresistance observed in single layer Co-Ag alloy films", Letter to the Editor, Journal of Magnetism and Magnetic Materials, 114 (1992), pp. L230-L234, (no month avail.)
J. S. Jiang et al., "Magnetic properties and giant magnetoresistance of granular permalloy", Appl. Phys. Lett. 61(19), Nov. 9, 1992, pp. 2362-2364.
B. Rodmacq et al., "Magnetoresistive properties and thermal stability of Ni-Fe/Ag multilayers", Journal of Magnetism and Magnetic Materials, 118 (1993), pp. L11-L16 (no month avail.).
Coffey Kevin R.
Howard James K.
Hylton Todd L.
Parker Michael A.
International Business Machines - Corporation
Murray Leslie G.
Pianalto Bernard
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