Theoretical analyses of interaction stresses acting between solid surfaces considering two-dimensional periodic material distribution

Abstract

In recently developed magnetic storage systems, the spacing between the flying head and the disk has been drastically reduced to less than a few nm to facilitate ultra-high density recording. Furthermore, magnetic interference between adjacent data tracks is becoming significant by reducing the spacing between the flying head and the disk. For that reason recording media with grooves such as discrete track media (DTM) and bit-patterned media (BPM) are considered to be some of the most promising media for achieving ultra-high densities. The interaction stresses and forces are changed due to the distribution of materials on the disk surface. In this paper, we established an analysis method of interaction stresses acting between solid surfaces considering two-dimensional periodic material distribution based on Lennard-Jones potential by using Fourier series expansion.