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A description of the complete off-track capability curve and its special application

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1 Author(s)
Teng-Chien Yu ; Trace Storage Technol. Corp., Hsinchu, Taiwan

For the first time the entire curve depicting the off-track capability of a magnetic recording head with inductive-write-wide, magnetoresistive-read-narrow is demonstrated. In contrast to the conventionally used 747 curve, “negative” off-track capability (OTC) is introduced both for theoretical derivations and experimental data. Due to the completeness of the measured 747 curve, more reliable data were obtained and served as known parameters for solving the head parameters w, r, and e (write, read, and erase band width) and the geometric noise to signal ratio constants (k, k0 , and k'). In addition, more equations were used to ensure the consistency of the solutions. Once the parameters and constants were determined, the calculated 747 curve was constructed. Finally, data track and erase bandwidths were examined by MFM experimentally and, compared with the calculated results, excellent agreement was found, thus validating the proposed method for its special application

Published in:

Magnetics, IEEE Transactions on  (Volume:34 ,  Issue: 4 )

Date of Publication:

Jul 1998

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