Ru/Ru-oxide interlayer for CoCrPtO perpendicular recording media

Author

Kwon, U. ; Sinclair, R. ; Velu, E.M.T. ; Malhotra, S. ; Bertero, G.

Author_Institution

Dept. of Mater. Sci. & Eng., Stanford Univ., CA, USA

fYear

2005

fDate

4-8 April 2005

Firstpage

1579

Lastpage

1580

Abstract

A Ru/Ru-oxide interlayer combination on a Ta seedlayer was introduced in order to realize further intergranular exchange decoupling in the magnetic layer by forming Ru grains with small size and uniform distribution separated by a non-magnetic oxide phase. Higher coercivity and signal to noise ratio (SNR) were achieved with a thin Ru-oxide layer. TEM shows that both the magnetic layer and Ru/Ru-oxide interlayer have a well-defined columnar structure. It was also observed that good hetero-epitaxial relationship is maintained throughout the Ru/Ru-oxide and Ru-oxide/magnetic layer interfaces. Ru grains were also observed to be well-isolated and uniformly distributed at the top portion of the Ru/Ru-oxide interlayer . Intergranular decoupling in the magnetic layer can be realized by forming the magnetic grains on the well-isolated Ru grains without disturbing the epitaxial relationship between the magnetic layer and the interlayer.

Keywords

coercive force; exchange interactions (electron); grain size; interface magnetism; ruthenium; ruthenium compounds; tantalum; transmission electron microscopy; TEM; Ta-Ru-RuO; coercivity; columnar structure; intergranular exchange decoupling; magnetic grains; perpendicular recording media; seedlayer; signal to noise ratio; Automation; Magnetic films; Magnetic properties; Magnetic separation; Materials science and technology; Microstructure; Perpendicular magnetic recording; Signal to noise ratio; Soft magnetic materials; X-ray scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1464223

Filename

1464223