Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855260
