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High-energy Co-Cr thin films sputtered on glass disks for perpendicular recording

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4 Author(s)
Kiuchi, K. ; Fujitsu Lab. Ltd., Atsugi, Japan ; Wakamatsu, H. ; Suzuki, F. ; Takagi, H.

The authors have developed high-energy Co-Cr thin-film perpendicular recording media for rigid disks. They obtained high perpendicular coercivity (Hc⊥) exceeding 2000 Oe with Co-Cr films sputtered on glass disks. They examined recording characteristics obtained with double-layered media and single-pole heads. Readout voltages were proportional to Hc⊥ up to 2000 Oe and not dependent on saturation magnetization. The authors explain the experimental results using the hysteresis curve of the Co-Cr film and the permeance factor determined by the magnetic reluctance of the head and medium. Using a magnetic circuit model, they clarify the effect of the difference in the operating point on the hysteresis curves of rigid- and flexible-disk systems

Published in:

Magnetics, IEEE Transactions on  (Volume:24 ,  Issue: 6 )

Date of Publication:

Nov 1988

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