Ultrathin Si/C graded layer to improve tribological properties of Co magnetic films

An ultrathin Si layer ( less than or equal to 1 nm) deposited on Co magnetic films was bombarded with energetic C+ ions to form a Co/Si/C mixed layer. This layer improved the tribological properties of the Co film as compared with those of a commercial hard disk media with 3.0 nm carbon overcoat and...

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Bibliographic Details
Published in:Applied physics letters 2012-11, Vol.101 (19), p.191601
Main Authors: Rismani, Ehsan, Samad, M. Abdul, Sinha, Sujeet K., Yeo, Reuben, Yang, Hyunsoo, Bhatia, C. Singh
Format: Article
Language:English
Subjects:
Carbon
Carbon-carbon composites
Chemical bonds
Deposition
Disks
Magnetic films
Silicon
Tribology
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Summary:An ultrathin Si layer ( less than or equal to 1 nm) deposited on Co magnetic films was bombarded with energetic C+ ions to form a Co/Si/C mixed layer. This layer improved the tribological properties of the Co film as compared with those of a commercial hard disk media with 3.0 nm carbon overcoat and 1.4 nm of lubricant. Formation of a network of C-C and Si-C bonds at the outermost layer and the bulk of the Si/C film as well as formation of chemical bonds between the Co surface and the mixed layer was found as the main factors to improve the tribological properties.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4765054