Magnetic sensor having a free layer containing a single...

Details Magnetic sensor having a free layer containing a single... Magnetic sensor having a free layer containing a single...

2007-09-25

2007-09-25

Castro, Angel (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S324000, C360S324110, C360S324120

Reexamination Certificate

active

10358179

ABSTRACT:
A magnetic sensor includes a spacer having at least a nonmagnetic metal layer inserted between the upper shield layer and the longitudinal bias layers or between the upper shield layer and the longitudinal bias layers plus the magnetoresistive film, the shortest distance between the longitudinal bias layers and the free layer of the magnetoresistive film is set smaller than the shortest distance between the longitudinal bias layers and the upper shield layer, and this arrangement ensures that the amount of magnetic flux entering the magnetoresistive film from the longitudinal bias layers is larger than that absorbed by the upper shield layer, thus realizing a magnetic sensor whose Barkhausen noise is suppressed.

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patent: 6381094 (2002-04-01), Gill
patent: 6839205 (2005-01-01), Kagami et al.
patent: 6950290 (2005-09-01), Hayashi et al.
patent: 2003/0039080 (2003-02-01), Kagami et al.
patent: A-10-162327 (1998-06-01), None
patent: 11175928 (1999-07-01), None
patent: 2001-6130 (2001-01-01), None

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