2203 Simulation of Spreading Characteristics of Monolayer Lubricant Films on Magnetic Disks Using Coarse-Grained Molecular Dynamics Simulation

Abstract

A molecular dynamics simulation using a coarse-grained bead-spring model was applied to investigate the spreading characteristics of monolayer lubricant films on magnetic disks. One of the end beads of a perfluoropolyether molecule was fixed to the disk surface in order to model a bonded molecule. The simulated diffusion coefficient of mobile molecules for various coverages of the bonded molecules was in good agreement with previous experimental result using the half-dip method. The simulated relation between the coverage and bonding ratio was also in good agreement with the experimental one.