Title :
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
fDate :
9/1/2000 12:00:00 AM
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 Hcr⩽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;
Journal_Title :
Magnetics, IEEE Transactions on
