Improvement of C/Nm characteristics by using tail-off recording method in obliquely evaporated Co-CoO tape

Author

Takayama, T. ; Kohashi, T. ; Kitagaki, N. ; Yano, A. ; Ogawa, Y.

Author_Institution

Central Res. Lab., Hitachi Ltd., Tokyo, Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2244

Lastpage

2246

Abstract

A new recording method to improve the R/W characteristics of Co-CoO obliquely evaporated tape is proposed. Using a tail-off method in which the recording current is cut for a certain period before applying the reverse field, the carrier-to-noise ratio increased by 2 to 3 dB compared to in the conventional method using a rectangular wave current. The above improvement was found to be due to an increase of carrier output and a decrease of media noise. The increase of carrier output can be explained as a suppression of demagnetization caused by the trailing edge field. On the other hand, the decrease of media noise is explained as an increase of the trailing edge field applied in the hard axis of the media which narrows the width of the domain

Keywords

cobalt; cobalt compounds; demagnetisation; magnetic recording; magnetic recording noise; magnetic tapes; Co-CoO; R/W characteristics; carrier output; carrier-to-noise ratio; demagnetization suppression; media noise; obliquely evaporated Co-CoO tape; recording current; rectangular wave current; reverse field; tail-off recording method; trailing edge field; Current measurement; Demagnetization; Laboratories; Magnetic field measurement; Magnetic heads; Magnetic noise; Magnetic recording; Magnetization; Signal to noise ratio; Video recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800787

Filename

800787