Magnetoresistive sensor having exchange-coupled stabilization fo

Details Magnetoresistive sensor having exchange-coupled stabilization fo Magnetoresistive sensor having exchange-coupled stabilization fo

1994-08-15

1996-04-16

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539, G11B 5127

Patent

active

055088660

ABSTRACT:
In a magnetoresistive (MR) read sensor in which the MR layer is transversely biased by a soft magnetic layer separated from the MR layer by a nonmagnetic spacer layer an antiferromagnetic stabilization layer of NiO provides a stabilizing exchange-coupled magnetic field to the transverse bias layer insuring that the transverse bias layer is fully saturated in a preferred direction during sensor operation.

REFERENCES:
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 4663685 (1987-05-01), Tsang
patent: 5408377 (1995-04-01), Gurney et al.
Ching Tsang, Magnetics of small magnetoresistive sensors (invited), J. Appl. Phys. 55(6), Mar. 15, 1984, pp. 2226-2231.
M. J. Carey and A. E. Berkowitz, Exchange Arisotropy in Coupled Films of Ni.sub.81 Fe.sub.19 with NiO and Co.sub.x Ni.sub.1-x O, Appl. Phys. Lett., vol. 60, No. 24, Jun. 1992.
S. Soeya, Magnetic Properties of NiO/NiFe Exchange Coupled Films, 1991.
S. Soeya, A Magnetization Mechanism of Exchange-Coupled Double Layered Films, 1992.
S. Soeya, Magnetic Properties of the Exchange Coupled Permalloy/Low Bs Ferromagnetic/Antiferromagnetic Films, 1992.
S. Soeya, Magnetic Properties of the Exchange Coupled NiFe/NiO Films, 1993.

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