Exchange biased magnetoresistive transducer

Details Exchange biased magnetoresistive transducer Exchange biased magnetoresistive transducer

1995-06-02

1998-06-09

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

057644454

ABSTRACT:
A magnetoresistive (MR) transducer is disclosed in which an exchange coupled anisotropy field is provided by an antiferromagnetic NiMn alloy in contact with the MR alloy. Improved exchange coupling is achieved using an MR layer and adjacent NiMn exchange coupling layer which have substantially fcc structure and a preferred {111} crystalline orientation. The exchange bias field is observed to correlate strongly with the structural order of the films. A preferred method of fabricating the MR transducer enhances the structural order of the layers during growth, thereby reducing a post-deposition anneal typically required in such processes. The preferred fabrication process further provides greater predictability and control over the resulting exchange coupling.

REFERENCES:
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 4755897 (1988-07-01), Howard
patent: 4825325 (1989-04-01), Howard
patent: 5014147 (1991-05-01), Parkin et al.
patent: 5315468 (1994-05-01), Lin et al.
patent: 5373238 (1994-12-01), McGuire et al.
patent: 5436777 (1995-07-01), Soeya et al.
patent: 5436778 (1995-07-01), Lin et al.
patent: 5461527 (1995-10-01), Akiyama et al.
patent: 5508866 (1996-04-01), Gill et al.
patent: 5528440 (1996-06-01), Fontana et al.
patent: 5549978 (1996-08-01), Iwasaki et al.
patent: 5561368 (1996-10-01), Dovek et al.
patent: 5574605 (1996-11-01), Baumgart et al.
patent: 5608593 (1997-03-01), Kim et al.
Pal, L. et al., "Magnetic Structures and Phase Transformations in Mn-Based CuAu-I Type Alloys", Journal of Applied Physics, vol. 39, No. 2, Feb. 1, 1968, pp. 538-544.
Menshikov, A.Z. et.al., "Magnetic State of Iron-Nickel-Manganese Alloys", Sov. Phys. JETP, vol. 44, No. 2, Aug. 1976, pp. 341-344.
Westwood, W.D. et al., Tantalum Thin Films, Academic Press, London, 1975, pp. 19-25.
Menshikov, A.Z. et al., "Exchange Interaction and Magnetic Properties of Iron-Nickel-Manganese Alloys", Journal of Magnetism and Magnetic Materials, 1975, pp. 91-97.
Lin, Tsann et al., "Improved Exchagne Coupling Between Ferromagnetic Ni-Fe and Antiferromagnetic Ni-Mn-based Films", Appl. Phys. Lett., vol. 65, No. 9, Aug. 29, 1994, pp. 1183-1185.
Tsang, Ching, "Magnetics of Small Magnetoresistive Sensors (Invited)", J. Appl. Phys., vol. 55, No. 6, Mar. 15, 1984, pp. 2226-2231.

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