Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (10): 49-53,60.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Analysis of Rarefied Regions and Rarefied Effects of a Nano-Scale Magnetic Head

Huang Ping   

  1. School of Mechanical Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2007-03-19 Online:2007-10-25 Published:2007-10-25
  • Contact: 黄平(1957-) ，男，教授，博士生导师，主要从事现代设计理论及应用研究. E-mail:mephuang@scut. edu.cn
  • About author:黄平(1957-) ，男，教授，博士生导师，主要从事现代设计理论及应用研究.
  • Supported by:

    国家重点基础研究发展计划资助项目(2003CB716205)

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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