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Data storage and retrieval using perpendicular media and magnetoresistive read transducer

By: Kim, Y.K.; Harig, J.C.; Noyes, G.I.; Lairson, B.M.; Kane, M.H.; Kuoksan Ho;

1997 / IEEE

Description

This item was taken from the IEEE Periodical ' Data storage and retrieval using perpendicular media and magnetoresistive read transducer ' 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 PW/sub 50/ of 174 nm and a D/sub 50/ 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/spl times/10/sup -7/. The signal waveform was stable and had good up-down amplitude symmetry.