Abstract
In the latest magnetic storage systems, the space between the flying head and the disk has been dramatically decreased to less than 10 nm in order to realize ultra-high density recording. When the flying-head height is of the same order as the lubricant film thickness, lubricant deformation affects the static and dynamic flying characteristics of the slider. Therefore, it is very important to investigate the deformation and flow characteristics of lubricant on the recording disk, especially dynamic deformation of the lubricant, which suffers from repetitively applied pressure and shear stress from the flying head slider. In this paper, the dynamic behavior of an ultra-thin liquid (lubricant) surface resulting from repetitively applied pressure and shear stress under a vibrating flying head slider are numerically obtained. The dependence of the liquid surface deformation on the frequency of the stresses, the disjoining pressure, and the disk speed are clarified.
