IJTC2007-44012 DYNAMIC INDENTAION CHARACTERISTICS OF SPHERICAL SLIDERS COLLIDING WITH STATIONARY MAGNETIC DISKS WITH A THIN LUBRICANT LAYER

Abstract

ABSTRACT We measured the dynamic adhesion force when spherical sliders with a radius of 1 and 2 mm collided with smooth magnetic disks with lubricant layers of zero, 1, 2, and 3 nm thickness to clarify the dynamic interfacial force between a slider and disk in the nanometer region of flying height. From the measured slider velocity, we calculated the relationship between acceleration (acting force) and displacement. We found that a strong adhesion force observed at zero lubricant vanishes when 1-nm thick lubricant with UV is applied. As the mobile lubricant thickness was increased, we observed a clear dynamic adhesion force at the instant of separation. These results indicate that adhesion force is most likely to result from meniscus formation. INTRODUCTION Since a flying head slider tends to exhibit bouncing vibration in sub-10 nanometer flying height, finding the origin of attraction and friction forces in slider/disk nanometer spacing is important. Although some researchers Since many researchers still believe that meniscus cannot form during a short duration of contact when the slider exhibit