Van der waals interactions between the air-bearing surface and lubricated glass disk: A comparative study
Date
2006
Authors
Crone, R.
Dagastine, R.
White, L.R.
Jones, P.
Hsia, Y.
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Journal article
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Applied Physics Letters, 2006; 88(2)
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<jats:p>Lifshitz theory has been used to calculate the van der Waals (vdW) force between a magnetic storage read-write head over both a lubricated glass disk and a magnetic disk. These forces were then incorporated into an air-bearing simulation that calculates the flying height of the slider as a function of disk revolutions per minute (rpm) for both types of media. A sharp decrease in the flying height of the slider over the magnetic disk was calculated at approximately 1950 rpm, whereas a similar decrease is observed at 150 rpm slower over the glass disk. These differences were ascribed to a significantly larger vdW force acting between the slider and the magnetic media, when compared to the glass disk. The magnitude of the vdW force, acting on the slider, over both glass and magnetic media, is described and its relevance to the reliability of the head-disk interface is discussed.</jats:p>
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Copyright American Institute of Physics 2006