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High-density magnetic recording heads

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1 Author(s)
Jeffers, Fred ; Eastman Kodak Company, San Diego, CA, USA

This paper outlines the important dimensions and parameters of high-density heads and discusses why each is important and how they are related. Among factors discussed are: head-to-media spacing, record gap size, media coercivity and remanence, record demagnetization fields, record gap-edge saturation in ferrite, metal, metal-in-gap, and thin-film heads, and head wear. Gap-edge straightness is discussed. Magnetoresistive read heads are described. Vertical recording and pole-type heads are discussed. Principle sources of head noise are outlined.

Published in:

Proceedings of the IEEE  (Volume:74 ,  Issue: 11 )