Dynamic magnetic information storage or retrieval – Record medium
Patent
1986-02-28
1988-05-17
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record medium
360125, 360134, 360135, 360136, 428694, 428928, G11B 574
Patent
active
047455101
ABSTRACT:
A perpendicular magnetic recording and reproducing system records and reproduces a signal on and from a perpendicular magnetic recording medium comprising a magnetic layer which is made from one magnetic material and is constituted by a layer having a low coercivity and a layer having a high coercivity on top of the layer having the low coercivity, by use of a ring core head and utilizes the layer having the low coercivity as a high permeability layer and the layer having the high coercivity as a perpendicular magnetization layer.
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IEEE Transactions on Magnetics, vol. MAG-20, No. 5, Sep. 1984, pp. 774, 775.
Imaoka Eiichiro
Ishizaka Yasuo
Kimura Kazuo
Watanabe Noboru
Bussan Matthew J.
Victor Company of Japan Ltd.
Wolff John H.
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