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Effect of magnetic field on the friction between two crossed steel cylinders in reciprocating motion in ambient air was experimentally studied in a speed range of 0.012–0.24m/s and a load range of 0.5–6N. Upon the applying of an external magnetic field, the friction force and the acoustic emission (AE) signal increased while the wear rate decreased. The increase of friction force is mainly ascribed...
As dynamic fly-height (DFH) sliders with active flying-height (FH) control using local thermal expansion caused by a heating element were introduced in hard disk drives recently, the minimum clearance between the head and disk has been reduced to sub-3-nm. To achieve a higher recording density, the clearance will have to become even smaller, which will make the slider more likely to contact the disk...
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