Apparatus for detecting a magnetic field using a giant magnetore

Details Apparatus for detecting a magnetic field using a giant magnetore Apparatus for detecting a magnetic field using a giant magnetore

1997-05-06

1998-08-25

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

057988960

ABSTRACT:
For preventing output drop with time of a MR magnetic head or similar apparatus including a magnetic field sensor in the form of a giant magnetoresistive element of the induced ferrimagnetic or spin-valve type in which antiparallelism of magnetization is induced between the magnetic layers by external magnetization, a magnetic field detecting apparatus comprising a magnetic field sensor using a giant magnetoresistive multilayer film of the induced ferrimagnetic type or the like includes a magnetic field generating means such as a permanent magnet. The magnetic field sensor is moved to the proximity of the magnetic field generating means and placed within the magnetic field when the magnetic field sensor is out of use or its detection sensitivity drops.

REFERENCES:
patent: 5159513 (1992-10-01), Dieny et al.
patent: 5428491 (1995-06-01), Smith
patent: 5442508 (1995-08-01), Smith
patent: 5447781 (1995-09-01), Kano et al.
patent: 5452163 (1995-09-01), Coffey et al.

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