Effect of van der Waals Forces in a Near Contact Head-Disk Interface
- 16 December 2008
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 44 (11), 3675-3678
- https://doi.org/10.1109/TMAG.2008.2002401
Abstract
The minimum flying height, elastic deformation, and attractive pressure caused by van der Waals force under static air-bearing pressure were analyzed numerically using a spherical pad slider and a flat disk model. Parametric analysis revealed that when the pad radius of curvature was 20 mm, the minimum possible flying height was about 1 nm. The smallest roughness height, for reducing the van der Waals attractive force to less than the meniscus force, is ~ 0.5 nm.Keywords
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