Title :
Data storage and retrieval using perpendicular media and magnetoresistive read transducer
Author :
Ho, Kuoksan ; Kane, Matthew H. ; Lairson, Bruce M. ; Noyes, George I. ; Harig, John C. ; Kim, Young K.
Author_Institution :
Dept. of Mech. Eng. & Mater. Sci., Rice Univ., Houston, TX, USA
fDate :
7/1/1997 12:00:00 AM
Abstract :
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
Keywords :
FIR filters; digital magnetic recording; magnetic heads; magnetic sensors; magnetoresistive devices; perpendicular magnetic recording; 75 Mbit/s; data retrieval; data storage; data transfer rate; equalized unipolar pulse; error rate; error window margin; finite impulse response filter; linear density; magnetic recording; magnetoresistive read transducer; magnetoresistive recording head; multilayer perpendicular medium; peak detect channel; signal waveform up-down amplitude symmetry; Density measurement; Error analysis; Finite impulse response filter; Information retrieval; Magnetic heads; Magnetic multilayers; Magnetic recording; Magnetoresistance; Memory; Perpendicular magnetic recording;
Journal_Title :
Magnetics, IEEE Transactions on
