Spin valve magnetoresistance device and method of designing the

Details Spin valve magnetoresistance device and method of designing the Spin valve magnetoresistance device and method of designing the

Filed on

1999-04-07

Date issued

2000-11-07

Examiner

Cao, Allen T.

Patent Class

Dynamic magnetic information storage or retrieval

SubClass

Head

SubSubClass

Hall effect

Other Related Categories

G11B 5127

Type

Patent

Status

active

Patent number

06144524&

Description

ABSTRACT:
A spin valve magnetoresistance device including a free magnetic layer, a pinned magnetic layer, a non-magnetic layer disposed between them and a permanent magnet film defining a track width x(in .mu.m) and configured to control magnetic domains of the free magnetic layer. The product of the residual magnetization (in .mu.emu/cm.sup.3) of the permanent magnet film times the thickness (in cm) thereof is given by f(x):

REFERENCES:
patent: 5206590 (1993-04-01), Dieny et al.
D. Lu, et al., IEEE Transactions on Magnetics, vol. 31, No. 6, pp. 2615-1617, "Micromagnetic Analysis of Permanent Magnet Biased Narrow Track Spin-Valve Heads", Nov. 1995.
S. Haratani, et al., Journal of the Magnetics Society of Japan, vol. 21, Supplement, No. S2, pp. 371-374, "Micromagnetic Simulation of Hard Bias Field Effects on Submicron Spin Valve Heads", 1997.

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