Title :
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
fDate :
11/1/1988 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
