Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1992-09-25
1995-03-28
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Head
Hall effect
360126, 360122, G11B 539, G11B 531, G11B 5187
Patent
active
054022924
ABSTRACT:
A magnetoresistance effect type thin film magnetic head includes a MR element having the electrical resistance changed according to a change in an applied signal magnetic field, a lead electrode for detecting a voltage change generated across the ends of the MR element in which a change in electrical resistance is generated, and high coercive force films for applying a weak magnetic field to the MR element. The high coercive force films are arranged in the proximity of the ends of the MR element and at a predetermined position between the ends. According to this structure, a weak magnetic field is applied in uniform over the entire MR element to facilitate unification of magnetic domain of the MR element even in the case of a long MR element. Therefore, unification of magnetic domain can easily be carried out over the entire region of the MR element without increasing the film thickness of the high coercive force film even in a case of a wide track width, resulting in a thin film magnetic head with no Barkhausen noise generation.
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"Barkhausen Noise in Yoke Type MR Head" Institute of Electronics, Information and Communication Engineers of Japan, MR86-37, 1986.
Fujii Akiyoshi
Kira Tohru
Komoda Tomohisa
Minakata Ryoji
Mukai Atsuo
Conlin David G.
Fournier Kevin J.
Levy Stuart S.
O'Connell Robert F.
Renner Craig A.
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