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

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2405

Lastpage

2407

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908447

Filename

908447