Molecular Dynamics Simulation of Lubricant Transfer at the Head-Disk Interface

Author

Seo, Young Woo ; Pan, David Z. ; Ovcharenko, Andrey ; Yang, May ; Talke, Frank E.

Author_Institution

Center for Magn. Recording Res., Univ. of California at San Diego, La Jolla, CA, USA

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

Molecular dynamics simulation is used to investigate lubricant transfer at the head-disk interface as a function of local pressure change, disk velocity, air bearing design, lubricant bonding ratio, head-disk spacing, and finite width of air bearing. A coarse-grained bead-spring model is used in conjunction with the Lennard-Jones potential, a short-range attractive polar potential, and a finitely extensible nonlinear elastic potential. The results show that lubricant transfer increases as a function of local pressure change, disk velocity, and air bearing width, but decreases with an increase in air bearing convergence angle, lubricant bonding ratio, and slider-disk spacing.

Keywords

lubricants; magnetic disc storage; magnetic heads; Lennard-Jones potential; air bearing convergence angle; air bearing design; air bearing finite width; coarse-grained bead-spring model; disk velocity; finitely extensible nonlinear elastic potential; head-disk interface; head-disk spacing; local pressure change function; lubricant bonding ratio; lubricant transfer; molecular dynamics simulation; short-range attractive polar potential; slider-disk spacing; Atmospheric modeling; Bonding; Computational modeling; Convergence; Hard disks; Lubricants; Mathematical model; Head???disk interface; lubricant transfer; molecular dynamics simulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2322353

Filename

6971421