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Data storage and retrieval using perpendicular media and magnetoresistive read transducer

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6 Author(s)
Ho, Kuoksan ; Dept. of Mech. Eng. & Mater. Sci., Rice Univ., Houston, TX, USA ; Kane, M.H. ; Lairson, Bruce M. ; Noyes, G.I.
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We have investigated magnetic recording on multilayer perpendicular media using a conventional peak detect channel and a commercial magnetoresistive recording head. A finite impulse response filter was used to equalize the impulse response from perpendicular media into a unipolar pulse. Equalized pulses had a PW50 of 174 nm and a D50 of 131 kfei. Without write precompensation, a linear density of 204 kbits per inch (kbpi) with a 3.3 ns error window margin and a data transfer rate of 75 Mbit/s was measured with an error rate of 4×10-7. The signal waveform was stable and had good up-down amplitude symmetry

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Magnetics, IEEE Transactions on  (Volume:33 ,  Issue: 4 )