Abstract
In recent magnetic storage systems, the spacing between the flying head and the disk has been dramatically decreased to less than 10 nm for realizing ultra-high density recording. Therefore, it is very important to investigate the deformation and flow characteristics of the lubricant on the recording disk, especially the dynamic deformation of the lubricant, which is suffered from the repetitively applied pressure and shear stress by the flying head slider. In this paper, the dynamic behaviors of the ultra-thin liquid (lubricant) surface by repetitively applied gas pressure or shear stress were numerically obtained by frequency domain analysis. The dependence of the liquid surface deformation on the frequency of the stresses and the disk speed were clarified. Transient behaviors to the steady response analysed by time domain analysis were compared with the frequency domain analysis.
