Abstract
This article addresses the topographic effect of surface roughness of a rotating magnetic disk on the flying height of a slider. Equations describing the dynamics of a slider are solved by numerical techniques to obtain the flying height. Variations in the flying height of the slider are given for topographic structures involving both deterministic and random surface asperities of the disk. It is found that surface roughness of a rotating disk plays a significant role in inducing flying-height fluctuations, and different topographic structures of the surface roughness lead to different statistical variations in the flying height. The influence of topographic parameters such as the amplitude, shape, and wavelength of surface asperities on the flying-height fluctuations is also investigated.
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