CrMn underlayers for CoCrPt thin film media

Author

Lee, Li-Lien ; Laughlin, David E. ; Lambeth, David N.

Author_Institution

Intevac Inc., Santa Clara, CA, USA

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1561

Lastpage

1563

Abstract

An improved CoCrPt thin film medium for longitudinal magnetic recording which has a coercivity significantly greater than prior CoCrPt thin film media was investigated. A CrMn alloy underlayer was used, instead of the conventional Cr underlayer. A coercivity value of 4280 Oe was easily reached in a CoCrPt film on a 50 nm thick CrMn underlayer as compared to 2810 Oe with a pure Cr underlayer. It was found that the coercivity increase due to the Mn addition was realized if the substrates were preheated before the sputtering. Grain boundary interdiffusion of Mn from the underlayer to the magnetic layer may be the cause for the coercivity increase

Keywords

chemical interdiffusion; chromium alloys; cobalt alloys; coercive force; grain boundary diffusion; magnetic recording; magnetic thin films; manganese alloys; platinum alloys; sputtered coatings; CoCrPt thin film media; CrMn; CrMn underlayer; CrMn-CoCrPt; Mn addition; Mn grain boundary interdiffusion; coercivity; longitudinal magnetic recording; magnetic layer; preheated substrates; sputtered coatings; Chromium alloys; Cobalt alloys; Coercive force; Lattices; Magnetic films; Manganese alloys; Plasma measurements; Platinum alloys; Sputtering; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706615

Filename

706615