Noise and ΔM⊥ analysis of a Cr-rich Co-Cr perpendicular medium for an MR head

Author

Ikeda, Y. ; Sonobe, Y. ; Uchida, H. ; Toyooka, T.

Author_Institution

Res. Lab., IBM Japan Ltd., Kanagawa, Japan

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

3828

Lastpage

3830

Abstract

The medium noise in a Cr-rich Co-Cr alloy perpendicular medium was investigated by using an MR head designed for longitudinal recording. Medium with a Cr content of 28 at.% showed a high crystalline orientation and a low write-demagnetization effect. The signal-to-noise ratio (S/N) of the medium was higher than that of conventional Co-Cr perpendicular media for inductive heads. The advantages of the medium derive from the large inter-particle perpendicular magnetic interaction (ΔM⊥) of media, which increased linearly with the Cr content, reaching a maximum value at 28 at.%. This strong interaction in the medium results in a high S/N for a recording system using a single-layer perpendicular medium and an MR head

Keywords

chromium alloys; cobalt alloys; demagnetisation; magnetic heads; magnetic recording noise; magnetoresistive devices; perpendicular magnetic recording; Co-Cr; Co-Cr alloy; MR head; crystalline orientation; perpendicular magnetic interaction; perpendicular medium; signal-to-noise ratio; write demagnetization; Chromium; Crystallization; Demagnetization; Glass; Human computer interaction; Magnetic films; Magnetic heads; Magnetic noise; Noise measurement; Sputtering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539186

Filename

539186