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Modeling of Readback Pulse Shape of GMR Head

Weichun YE, Yuankai ZHENG, Seidikkurippu N. PIRAMANAYAGAM, Yu LIN, Victor Y. KRACHKOVSKY

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Summary :

Two isolated pulse models, the Lorentzian-like and the Mixture model, were used to investigate the effect of GMR heads-media with different geometric and magnetic parameters on the readback pulse shape. The matching of these two models with an actual pulse was compared in detail. The dependence of the readback pulse shape of GMR head on the head-media parameters and non-linear distortions was discussed in this paper. When applying these models to evaluate the performance of a recording system, it is necessary to take into account of the difference between the linear superposition of the isolated pulse and the actual readback data pattern. It was suggested to linearize the captured isolated pulse in order to use the model correctly as a useful tool for evaluating the system performance.

Publication
IEICE TRANSACTIONS on Electronics Vol.E84-C No.9 pp.1158-1164
Publication Date
2001/09/01
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Issue on Selected Papers from the 5th Asian Symposium on Information Storage Technology)
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