Title :
Effects of stoichiometry on the magnetic and structural properties of perpendicular barium ferrite thin film media
Author :
Zhuang, Zailong ; Bian, Bo ; Rao, Maithri ; White, Robert M. ; Laughlin, David E.
Author_Institution :
Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
The effects of stoichiometry factor n on the magnetic and structural properties of perpendicular barium ferrite thin films with composition of BaO.n(Fe2O3) were systematically investigated. Within the range 2.2<n<6, the c-axis for barium ferrite thin films can be oriented perpendicularly by the use of a Pt underlayer and with optimized processing conditions. Perpendicular c-axis orientation becomes worse as n decreases from 6 to 2.2. The average grain size was greatly reduced from about 2000 Å to 300 Å with the decrease of n. The decrease of the grain size can be related to the existence of nonmagnetic phase BaFe2O4 , which was observed by X-ray diffraction
Keywords :
barium compounds; ferrites; grain size; magnetic thin films; perpendicular magnetic recording; stoichiometry; BaFe2O4; Pt underlayer; X-ray diffraction; c-axis orientation; ferrite; grain size; perpendicular thin film media; stoichiometry; Argon; Barium; Ferrite films; Grain size; Magnetic anisotropy; Magnetic films; Magnetic properties; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
