Conformation and motion of monolayer lubricant molecule on magnetic disks

Author

Fukuzawa, Kenji ; Itoh, Shintaro ; Suzuki, Kenta ; Kawai, Yusuke ; Zhang, Hedong ; Mitsuya, Yasunaga

Author_Institution

Nagoya Univ., Japan

Volume

41

Issue

10

fYear

2005

Firstpage

3034

Lastpage

3036

Abstract

The conformation and diffusive motion of molecules of monolayer perfluoropolyether lubricants on magnetic disks have been clarified by investigating surface energy and spreading characteristics. A mobile molecule lies flat on the disk surface and a bonded molecule lies less flat than a mobile one. In addition, a model for the diffusive motion of the mobile molecule is presented. The diffusive motion can be explained by a modified reptation theory. The mobile molecule makes a snake-like diffusive motion through the bonded ones. These results are useful for building a tribological model of a monolayer lubricant on a magnetic disk.

Keywords

lubricants; magnetic disc storage; molecular configurations; monolayers; surface energy; tribology; diffusive motion; hard disk interface; magnetic disks; micro-nanotribology; mobile molecule; modified reptation theory; molecular conformation; monolayer perfluoropolyether lubricant; spreading characteristic; surface energy; tribological model; Annealing; Bonding; Dispersion; Energy measurement; Friction; Hard disks; Lubricants; Magnetic films; Magnetic materials; Thickness measurement; Hard disk interface; lubricant; micro-nanotribology; molecular conformation; monolayer; perfluoropolyether; reptation; spreading;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.855260

Filename

1519198