Title :
Coupling and crystallographic effects in thin film cobalt alloy recording media
Author :
Dova, P. ; O´Grady, K. ; Doerner, M.F. ; Mirzamaani, M.
Author_Institution :
Sch. of Electron. Eng., Univ. Coll. of North Wales, Bangor, UK
fDate :
9/1/1997 12:00:00 AM
Abstract :
Intergranular interactions and time dependence effects have been studied in two classes of Co-alloy ternary and quaternary thin films. The role of intergranular coupling was investigated in films with sputter texture as well as in films with bicrystal structure. Both classes of media exhibited low noise. It was found via the ΔI(B) technique that exchange coupling was predominant in bicrystal films while sputter texture samples were magnetically decoupled. The time dependence studies revealed that both sputter texture and a bicrystal microstructure are effective ways to produce thin films with very low activation volumes suitable for high density recording
Keywords :
cobalt alloys; exchange interactions (electron); ferromagnetic materials; magnetic recording noise; magnetic thin films; magnetisation; sputter deposition; surface texture; activation volumes; bicrystal structure; crystallographic effects; exchange coupling; high density recording; intergranular interactions; magnetic recording noise; magnetically decoupled samples; quaternary thin films; sputter texture; ternary thin films; thin film recording media; time dependence effects; Chromium; Cobalt alloys; Couplings; Crystallography; Magnetic films; Magnetic materials; Magnetic noise; Magnetic recording; Microstructure; Perpendicular magnetic recording; Saturation magnetization; Sputtering; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
