Effects of Ta addition in CoNi/Cr double layer film sputtered in low Ar gas pressure

Author

Kawanabe, Takashi ; Naoe, Masahiko

Author_Institution

Dept. of Phys. Electron., Tokyo Inst. of Technol., Japan

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2721

Lastpage

2723

Abstract

The effects of tantalum and chromium up to 5 at.%, added to the CoNi magnetic layer, on the magnetic properties and media noise of a CoNi/Cr double-layer magnetic recording medium, have been investigated. The CoNi magnetic layer and Cr underlayer were deposited at argon gas pressures as low as 2 and 0.2 mTorr, respectively, using a facing-targets sputtering apparatus. Addition of Cr to CoNi layers with high remanence squareness shows slight improvement of medium noise. The addition of Ts shows significant noise reduction, to the extent of about 3 dB

Keywords

chromium; cobalt alloys; ferromagnetic properties of substances; magnetic recording; magnetic thin films; nickel alloys; noise; sputtered coatings; storage media; tantalum; 0.2 mtorr; 2 mtorr; CoNi magnetic layer; CoNi-Cr; CoNiCr-Cr; CoNiTa-Cr; Cr underlayer; Ta addition; double layer film; facing-targets sputtering apparatus; low Ar gas pressure; magnetic properties; magnetic recording medium; media noise; noise reduction; sputtered films; Argon; Chromium; Disk recording; Magnetic films; Magnetic noise; Magnetic recording; Remanence; Scanning electron microscopy; Sputtering; Surface morphology;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92224

Filename

92224