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

Volume

33

Issue

4

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

2538

Lastpage

2542

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.595913

Filename

595913