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IEEE Transactions on Magnetics
Article . 1983 . Peer-reviewed
License: IEEE Copyright
Data sources: Crossref
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Head-to-media spacing losses in perpendicular recording

Authors: S. Iwasaki; D. Speliotis; S. Yamamoto;

Head-to-media spacing losses in perpendicular recording

Abstract

The perpendicular recording process is essentially demagnetization-free at high bit densities, and the head-to-medium spacing losses become perhaps the most constraining factor in realizing the ultimate capabilities of this technology. In this study we investigated the recording losses resulting from head-to-medium spacing for a double layer madium using a single-pole head and a narrow gap ring head. The spacing was introduced by sputtering Ti overlayers onto the CoCr film in the range of 0.02 microns to 0.18 microns. The recording experiments were performed using a tape deck and a closed tape loop running at low speed. For a spacing d and a wavelength λ, the spacing loss when writing and reading with the single pole head was found to be -99d/λ (dB) for any bit density up to 4Kbpmm (kilo-bits per mm). The spacing losses for the ring head, however, depend on bit density, and are much larger at lower bit densities. In an attempt to separate the writing from the reading spacing losses, we recorded with the single pole head and read back with the ring head. The results of this experiment show that the large spacing losses observed with a ring head at the lower bit densities are primarily incurred during the writing process.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
31
Average
Top 1%
Top 10%
bronze