Investigation into transient head-disk interaction using advanced time-frequency analysis

To achieve higher areal density, the physical spacing between the magnetic head and the disk has to be minimized (currently ~ 1 nm is expected). At such low spacing, the intermittent/continuous contact becomes unavoidable, which leads to head wear and may directly affect read/write performance . Although many studies over the years have been conducted to explore wear behaviors of head-disk interface, the wear mechanism during head-disk contact is not yet fully understood. Therefore, it is necessary to investigate this critical problem which may help to improve the anti-wear performance of head-disk interface.

To achieve higher areal density, the physical spacing between the magnetic head and the disk has to be minimized (currently ~ 1 nm is expected). At such low spacing, the intermittent/continuous contact becomes unavoidable, which leads to head wear and may directly affect read/write performance [1]. Although many studies over the years have been conducted to explore wear behaviors of head-disk interface [2] – [8], the wear mechanism during head-disk contact is not yet fully understood. Therefore, it is necessary to investigate this critical problem which may help to improve the anti-wear performance of head-disk interface.