Title :
Magnetic and Recording Characteristics of Reactively Sputtered CoPtCr-(Si-O, Ti-O, and Cr-O) Perpendicular Media
Author :
Choe, G. ; Roy, A. ; Yang, Z. ; Acharya, B.R. ; Abarra, E.N.
Author_Institution :
MMC Technol., San Jose, CA
Abstract :
A systematic investigation of the magnetic and recording characteristics of reactively sputtered CoPtCr-(Si-O, Ti-O, Cr-O) media has been performed. The optimum oxidation condition for media with well-isolated Co grains, high coercivity (Hc) and nucleation field (Hn), and superior media noise performance strongly depends on the oxide type. Despite differences in the optimum oxidation condition, the highest achievable Hc and Hn are similar. The transition jitter and magnetic write width are mainly determined by the magnetic exchange coupling depending on the oxidation condition but not by the oxide type
Keywords :
chromium alloys; cobalt alloys; coercive force; magnetic heads; magnetic transitions; oxidation; perpendicular magnetic recording; platinum alloys; silicon compounds; sputtered coatings; titanium compounds; CoPtCr-Cr-O; CoPtCr-Si-O; CoPtCr-Ti-O; magnetic exchange coupling; magnetic recording characteristics; magnetic write width; optimum oxidation condition; oxide media; perpendicular recording media; reactively sputtered media; transition jitter; Additives; Magnetic anisotropy; Magnetic films; Magnetic properties; Magnetooptic recording; Morphology; Oxidation; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; X-ray scattering; Co-Pt-Cr oxide media; exchange coupling; perpendicular recording media; signal-to-noise ratio;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878671
