Journal article

Effect of van der Waals forces on molecularly thin lubricant in the magnetic storage head-disk interface

RR Dagastine, LR White, PM Jones, YT Hsia

JOURNAL OF APPLIED PHYSICS | AMER INST PHYSICS | Published : 2005

Abstract

The disjoining pressure of lubricant in the magnetic storage device head-disk interface (HDI) was obtained using Lifshitz theory [Sov. Phys. JETP 2, 73 (1956)] and multilayer film stack model. For this purpose the normal-air-gap-centered calculation of the disjoining pressure was replaced by the lubricant-layer-centered system. In the air-centered system the attractive force between the head and media was found to increase as the lubricant layer was thinned. By switching to the lubricant-centered system the disjoining pressure in a thin film of lubricant in the HDI was found to be negative at small head-to-media separation. By equating the free lubricant disjoining pressure with the lubrican..

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University of Melbourne Researchers