Track-edge noise versus erasure state

Author

Martin, B.D. ; Lambeth, D.N.

Author_Institution

ECE Dept., Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

3276

Lastpage

3278

Abstract

Track-edge noise was evaluated by means of spectrum analyzer measurements performed on isolated tracks, one recorded at 16 kfci and the other 40 kfci, on CoCrPt, CoNiPt, and CoCrTa media. The track-edge media noise correlated with intergranular exchange coupling and the initial erasure state of the media. This study of track-edge effects has confirmed the nature and existence of side-erase bands, located on either side of a recorded track for the three different thin-film media. Track-edge media noise was more noticeable for the 16 kfci tracks recorded on both previously AC- and DC-erased media. The track edges for the 40 kfci track recorded on previously DC-erased media proved to be regions of high noise which extended beyond the radial extent of the written track

Keywords

chromium alloys; cobalt alloys; magnetic recording; magnetic thin films; nickel alloys; platinum alloys; tantalum alloys; 16 kfci tracks; 40 kfci track; AC-erased media; CoCrPt media; CoCrTa media; CoNiPt media; DC-erased media; erasure state; intergranular exchange coupling; isolated tracks; side-erase bands; spectrum analyzer measurements; track-edge media noise; Bandwidth; CD recording; Magnetic heads; Noise measurement; Performance evaluation; Power measurement; Power system harmonics; Spectral analysis; Voltage; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179782

Filename

179782