High Spatial Resolutive Method Observing the Lubricant Distribution on Magnetic Recording Media

[+] Author and Article Information
Akiyasu Kumagai, Hitoshi Orikasa

Fuji Electric Corporate Research and Development. Ltd., Material Science and Technology Laboratory, 2-2-1 Nagasaka, Yokosuka, Kanagawa, 240-0194, Japan

Nobuyuki Takahashi

Fuji Electric Storage Device Co. Ltd., Research & Development Department, 4-18-1 Tsukama, Matsumoto, Nagano, 390-0821, Japan

Osamu Ishiwata

Fuji Electric Corporate Research and Development. Ltd., Material Science and Technology Laboratory

J. Tribol 122(4), 776-779 (Jun 08, 2000) (4 pages) doi:10.1115/1.1310560 History: Received September 02, 1999; Revised June 08, 2000
Copyright © 2000 by ASME
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Schematic drawings of oscillating tip behavior at low (a) and high (b) lube thickness points
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Example of DFM-phase mode images (a) and its phase lag histogram (b)
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Cantilever amplitude dependence on the “hole” area ratio of samples having mean lube thicknesses of 1.2 (circle), 1.7 (rectangle), 2.1 (triangle), and 2.5 (diamond) nm
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Comparison between the lubricant amount measured by DFM and mean lubricant thickness by FT-IR
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Lubricant distribution on a hard disk (a) and AFM image at the same area (b). The 1.7 nm-lubricated sample was observed.
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1st (a), 10th (b), and 35th (c) binarized phase lag images in repeated observation. The 1.7 nm-lubricated sample was used.



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