High-coercivity CoCrPt-Ti perpendicular media by in situ interdiffusion of CrMn ultrathin overlayers

Author

Roy, A.G. ; Jeong, S. ; Laughlin, D.E.

Author_Institution

Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2018

Lastpage

2020

Abstract

We have investigated the magnetic and structural properties of CoCrPt perpendicular films with respect to in situ interdiffusion of CrMn from top layers. We have observed a coercivity of 5700 Oe in films with a thin CrMn overlayer, which is greater than two times larger than similar type of films without a CrMn overlayer. This increment is attributed to the decoupling of grains by diffusion of CrMn from top layer through the grain boundaries.

Keywords

chemical interdiffusion; chromium alloys; cobalt alloys; coercive force; exchange interactions (electron); ferromagnetic materials; grain boundaries; magnetic thin films; manganese alloys; perpendicular magnetic anisotropy; perpendicular magnetic recording; platinum alloys; titanium; CoCrPt-Ti; CoCrPt-Ti-CrMn; CrMn ultrathin overlayers; coercivity; grain boundaries; grain decoupling; high-coercivity CoCrPt-Ti perpendicular media; in situ interdiffusion; magnetic properties; structural properties; top layers; Annealing; Coercive force; Force measurement; Grain boundaries; Magnetic films; Magnetic hysteresis; Magnetic properties; Perpendicular magnetic recording; Semiconductor thin films; Sputtering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.801815

Filename

1042076