关键词: 稀薄区域, 稀薄效应, 磁头, 工作性能

Abstract:

In the present paper, the modified Reynolds equation considering rarefied gas effect is used to calculate the rarefied region of a negative magnetic head working in the distance of 10 nm away. According to the calculated results , discussions and analyses are then presented to reveal the effects of rarefied region and rarefied effect on the working performances of the magnetic head. The results show that (1) the magnetic head works in the slip-flow and transition regions and moves to the transition region with the increase in velocity; (2) the maximum rarefied effect does not occur in the minimum flying height on the rear but at the side edges where the flying height is thinner and the pressure is lower; and (3) if the rarefied effect is considered , the load-carrying capacity of the magnetic head and the maximum pressure decrease , while the minimum pressure slightly changes.

Key words: rarefied region, rarefied effect, magnetic head, working performance