NDLI: Experimental studies of longitudinal and perpendicular high density recording

Content Provider	IEEE Xplore Digital Library
Author	Chi, C. Frey, K. Johnson, R. Maloney, W.
Copyright Year	1965
Abstract	Single layer and double layer Co-Cr disks of various coercivities were sputter-deposited on rigid substrates and magnetic parameters measured. Record and playback properties were studied using both ferrite and thin film heads under identical system environments. A well optimized Ni-Co plated longitudinal disk was used as a benchmark throughout this investigation for direct comparison. With the objective of using "off the shelf" ring heads to bring up the perpendicular recording technology on rigid substrates, it was found that the performance of both our preliminary single and double layer Co-Cr perpendicular disks were at least as good as the well optimized longitudinal disk. The double layer disks have an added advantage of lower write current. Signal processing via Hilbert transform using both rectangular and Hamming windows was also studied and applied to the output waveforms.
Sponsorship	IEEE Magnetics Society
Starting Page	1608
Ending Page	1610
Page Count	3
File Size	864185
File Format	PDF
ISSN	00189464
Volume Number	19
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic heads Disk recording Perpendicular magnetic recording Substrates Coercive force Probes Protection Ferrites Sputtering Chromium alloys
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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