Effects of thin carbon intermediate layer on magnetic and structural properties of perpendicular recording media

Nakagawa, Hiroyuki; Honda, Yukio; Kikukawa, Atsushi; Tanahashi, Kôtarô; Ishikawa, Akira; Futamoto, Masaaki

doi:10.1016/s0304-8853(01)00302-x

Cited by 6 publications

(1 citation statement)

References 6 publications

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“…Therefore, it has been expected to improve not only microstructure, but soft magnetic properties to overcome the noise. On the other hand, the nonmagnetic intermediate layer between recording layer and soft magnetic layer plays an important role to reduce magnetic interaction between the two layers and be so effective to improve the crystallographic properties of recording layer [3]. In this paper, Ni-Fe/Si multilayers as soft magnetic underlayer for the improvements of the surface smoothness and soft magnetic properties were introduced.…”

Section: Introductionmentioning

confidence: 99%

Ni-Fe-O intermediate layer and [Ni-Fe/Si]/sub n/ laminated soft underlayer for backlayer of Co-Cr-Ta-Pt perpendicular recording media

Kong

Okamoto

Kim³

et al. 2002

IEEE Trans. Magn.

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Ni-Fe-O layer prepared by natural oxidization method was examined for the intermediate layer between Co-Cr-Ta(-Pt) recording layer and soft magnetic [Ni-Fe/Si] multilayered backlayer in perpendicular magnetic recording media. [Ni-Fe/Si] multilayers were effective to exhibit soft magnetic properties and to improve axis orientation of Co-Cr-Ta crystallites in the recording layer deposited on it. Ni-Fe-O intermediate layer was suitable to obtain a finer grain as well as an epitaxial growth in Co-Cr-Ta(-Pt) recording layer. The intermediate layer was effective to reduce medium noise in high recording density area. Index Terms-[Ni-Fe/Si] multilayer, Ni-Fe-O layer, perpendicular magnetic recording media, soft magnetic underlayer.

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Section: Introductionmentioning

confidence: 99%

Ni-Fe-O intermediate layer and [Ni-Fe/Si]/sub n/ laminated soft underlayer for backlayer of Co-Cr-Ta-Pt perpendicular recording media

Kong

Okamoto

Kim³

et al. 2002

IEEE Trans. Magn.

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show abstract

Advancements in PMR thin-film media

Judy

2005

Journal of Magnetism and Magnetic Materials

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Effects of very thin carbon seedlayer on formation of hcp phase for CoCrPtB/Co/sub 60/Cr/sub 40/ perpendicular magnetic recording media

2002

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This paper reports on significant improvement of magnetic properties for CoCrPtB/Co 60 Cr 40 perpendicular recording media by utilizing very thin C seedlayer even with the thickness of less than 1 nm. This is caused by the following microstructural characteristic: 1) the C seedlayer, heated to higher than 200 C, reacts with CoCr intermediate layer, and results in the formation of nanocrystalline layer with the thickness of about 6 nm; 2) Cr-deprived hcp grains with Cr segregation structure grow on the nanocrystalline layer without forming -phase grains in the intermediate layer; 3) CoCrPtB magnetic layer epitaxially grows on the intermediate layer without forming initial layer, which behaves as soft ferromagnetic layer and degrades magnetic properties of the media. Index Terms--phase, Co 60 Cr 40 intermediate layer, epitaxial growth, very thin C seedlayer.

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Effects of thin carbon intermediate layer on magnetic and structural properties of perpendicular recording media

Cited by 6 publications

References 6 publications

Ni-Fe-O intermediate layer and [Ni-Fe/Si]/sub n/ laminated soft underlayer for backlayer of Co-Cr-Ta-Pt perpendicular recording media

Ni-Fe-O intermediate layer and [Ni-Fe/Si]/sub n/ laminated soft underlayer for backlayer of Co-Cr-Ta-Pt perpendicular recording media

Advancements in PMR thin-film media

Effects of very thin carbon seedlayer on formation of hcp phase for CoCrPtB/Co/sub 60/Cr/sub 40/ perpendicular magnetic recording media

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