Experimental studies of noise autocorrelation in thin film media

Author

Lin, Gang Herbert ; Bertram, H. Nea

Author_Institution

Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3697

Lastpage

3699

Abstract

Noise voltage autocorrelation in thin film media has been experimentally studied in the time domain. Unlike a spectral measurement, the time domain noise autocorrelation function provides a good characterization of nonstationary noise that is particularly useful for thin film media. A measurement technique is developed to eliminate the noise due to the lack of noise-free timing reference. An empirical eigenfunction expansion is applied to the measured noise autocorrelation matrix to identify possible physical mechanisms for the noise modes and eliminate alignment jitter. The noise autocorrelation function is reconstructed by using only the leading noise modes

Keywords

hard discs; magnetic recording; magnetic thin films; random noise; time-domain analysis; alignment jitter; autocorrelation matrix; empirical eigenfunction expansion; magnetic recording; measurement technique; noise modes; noise voltage autocorrelation; nonstationary noise; thin film disc; thin film media; time domain noise autocorrelation function; Autocorrelation; Eigenvalues and eigenfunctions; Jitter; Measurement techniques; Noise measurement; Particle measurements; Time measurement; Timing; Transistors; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281273

Filename

281273