Tdk Corporation

Yuuichi Sato

Satoru Araki

Yuuji Honda

Osamu Shinoura

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.

Apparatus for detecting a magnetic field using a giant magnetoresistance

For preventing output drop with time of a MR magnetic head or similar apparatus, 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 including 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.

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Chiba, Japan

Yuuichi Sato