Perpendicular magnetic recording/reproducing apparatus

Details Perpendicular magnetic recording/reproducing apparatus Perpendicular magnetic recording/reproducing apparatus

1995-11-13

1998-09-29

Resan, Stevan A.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360103, 360113, 360122, 360135, 428 653, 428457, 428611, 428668, 428692, 428694TM, 428694TS, 428900, G11B 566

Patent

active

058153420

ABSTRACT:
Disclosed is a perpendicular magnetic recording/reproducing apparatus comprising perpendicular magnetic recording media and magnetic heads. Each perpendicular magnetic recording medium has a substrate, a soft magnetic back layer and a magnetic recording layer with a perpendicular magnetic anisotropy both formed on the substrate. Each magnetic head has at least one magnetic field generating element capable of applying a magnetic field to a given region of the soft magnetic back layer at a time of signal reproduction, for performing recording and reproducing of magnetized signals with respect to the associated perpendicular magnetic recording media, whereby Barkhausen noise is reduced. The perpendicular magnetic recording medium may further include a bias-field applying layer formed on at least a substrate side surface of the soft magnetic back layer. Each perpendicular magnetic recording medium may further have the bias-field applying layer formed between the substrate and the high-permeability magnetic layer.

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patent: 4745510 (1988-05-01), Watanabe et al.
patent: 4839761 (1989-06-01), Gatzen
patent: 4954920 (1990-09-01), Yamada et al.

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