Performance study and analysis of dual-element head on thin-film disk for gigabit-density recording
- 1 January 1990
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 26 (6), 2948-2953
- https://doi.org/10.1109/20.102871
Abstract
Inductive-write and magnetoresistive-(MR)-read dual-element heads with very narrow tracks and gaps have been designed, fabricated, and tested on thin-film media of high coercivity and squareness. The results not only show excellent writeability at modest write currents but also the existence of a narrow region of optimum write current, limited by the onset of self-erasure by the write head at high write currents. This leads to significant degradations of overwrite, signal amplitude, trackwidth, linear resolution and disk-noise-induced peak-jitters. A peak-jitter approach is shown to be useful in characterizing many aspects of recording performance. A peak-jitter evaluation of signal-to-noise behavior reveals not only satisfactory overall performance but also the dominance of disk noise as well as a concentration of the disk noise at the track edges. Peak-jitter evaluations of offtrack and squeeze behavior clearly demonstrate the narrow-track capabilities of these recording heads for high areal density operationKeywords
This publication has 6 references indexed in Scilit:
- Theoretical study of the overwrite spectra due to hard-transition effects (magnetic recording)IEEE Transactions on Magnetics, 1989
- An experimental study of hard-transition peakshifts through the overwrite spectraIEEE Transactions on Magnetics, 1988
- Spatial structure of media noise in film disksIEEE Transactions on Magnetics, 1986
- Noise in high performance thin-film longitudinal magnetic recording mediaIEEE Transactions on Magnetics, 1985
- Overwrite as a function of record gap lengthIEEE Transactions on Magnetics, 1985
- Precise side writing measurements using a single recording headIEEE Transactions on Magnetics, 1984