Oxidation of seed-layer for improved magnetic and recording performance of thin-film rigid discs

Author

Mahvan, Nader ; Ziera, Eitan ; Eltoukhy, Atef

Author_Institution

Nashua Comput. Products, Santa Clara, CA, USA

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3691

Lastpage

3693

Abstract

The effect of oxidation of various seed layers for longitudinal media is described. Sputtered Ni₃P exposed to controlled quantities of atmospheric gas and sputtering seed layers of Ti and Cr in an atmosphere of oxygen and argon are described. An appreciable increase of the coercivity and the coercivity squareness was observed. The observed improvements were attributed to the presence of an oxide layer that formed on the surface of the sputtered films as a result of oxidation. This oxidation was shown to affect the microstructure of the deposits, the more significant of which is narrowing of the grain size distribution of the subsequent layers. To a lesser extent, the seed layers seem to reduce the average grain size of the subsequent deposits

Keywords

Auger effect; X-ray diffraction examination of materials; chromium; chromium alloys; cobalt alloys; coercive force; hard discs; magnetic multilayers; magnetic recording; magnetic thin film devices; magnetisation; nickel compounds; oxidation; platinum alloys; sputter deposition; titanium; Ar-O₂; CoCr₁₃Pt₈-Cr-Cr; CoCr₁₃Pt₈-Cr-NiP₃; CoCr₁₃Pt₈-Cr-Ti; X-ray diffraction; atmospheric gas; coercivity squareness; grain size distribution; longitudinal media; magnetic recording; microstructure; multilayer thin films; recording performance; scanning Auger spectroscopy; seed layer oxidation; sputtered films; thin-film rigid discs; Amorphous magnetic materials; Chromium; Coercive force; Disk recording; Magnetic films; Magnetic properties; Magnetic recording; Magnetic separation; Oxidation; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281271

Filename

281271