Effect of Disk Topography on Slider Dynamics

In this paper, the vertical, pitch, and roll components of the motion of a femto slider is studied as a function of disk topography. Laser Doppler vibrometry was used to measure the dynamic motion of the slider, as well as the disk topography in the vertical, pitch, and roll directions. Defining the gain of the slider as the ratio of slider motion to disk topography, we find that the gain of the slider is similar for all disks below the first pitch resonance frequency (150 kHz). Above this frequency, the gain of the slider is affected by the topography of the disks used