Magnetic interaction and thermal stability in CoSm thin films

Author

Zana, Iulica ; Zangari, Giovanni

Author_Institution

Dept. of Metall. & Mater. Eng., Alabama Univ., Tuscaloosa, AL, USA

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2345

Lastpage

2347

Abstract

We report a systematic experimental study of magnetic interactions and thermal stability in very thin films of CoSm fabricated by DC magnetron sputtering on glass substrates, CoSm/Cr films with CoSm thickness 6 to 14 nm yield high remanent coercivities H_cr⩽3.8 kOe and low remanent moment thickness product, Mrδ<0.44 memu/cm². The magnetic interactions are dominated by exchange coupling, decreasing with increasing thickness. Thermal stability as measured by magnetic viscosity and dynamic coercivity decreases with film thickness, but according to current criteria, CoSm films of down to a thickness of about 8 nm would be stable

Keywords

cobalt alloys; coercive force; exchange interactions (electron); magnetic disc storage; magnetic recording; magnetic thin films; samarium alloys; sputtered coatings; thermal stability; CoSm-Cr; DC magnetron sputtering; dynamic coercivity; exchange coupling; glass substrates; magnetic disks; magnetic interaction; magnetic recording; magnetic viscosity; remanent coercivities; remanent moment thickness product; thermal stability; very thin films; Chromium; Coercive force; Couplings; Current measurement; Glass; Magnetic films; Sputtering; Stability criteria; Substrates; Thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908424

Filename

908424