Spatial noise phenomena of longitudinal magnetic recording media

Author

Hoinville, Jay R. ; Indeck, Ronald S. ; Muller, Marcel W.

Author_Institution

Dept. of Electr. Eng., Washington Univ., St. Louis, MO, USA

Volume

28

Issue

6

fYear

1992

fDate

11/1/1992 12:00:00 AM

Firstpage

3398

Lastpage

3406

Abstract

The authors have studied the spatial noise characteristics of uniformly magnetized media and implemented a synchronous magnetic pulse detection technique to measure waveforms from precise radial and azimuthal locations on a magnetically recorded disk. They introduce a correlation analysis which includes measuring noise waveforms from the same position on the disk under different remanent magnetic states. Results from this analysis demonstrate that at remanence only minor changes occur in the output waveform and its (presumed) corresponding magnetic structure from write to write, while at DC demagnetization large variations are seen for successive writes. This sensitive correlation technique is used to analyze the random and deterministic components of media and head noise

Keywords

correlation methods; magnetic disc storage; magnetic recording; noise; waveform analysis; DC demagnetization; correlation analysis; head noise; longitudinal magnetic recording media; magnetically recorded disk; media noise; remanence; spatial noise characteristics; synchronous magnetic pulse detection technique; uniformly magnetized media; waveforms; Demagnetization; Magnetic analysis; Magnetic heads; Magnetic noise; Magnetic recording; Noise measurement; Position measurement; Pulse measurements; Random media; Remanence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179817

Filename

179817