Microsystem Technologies

, Volume 17, Issue 5–7, pp 1109–1114 | Cite as

Modeling laser induced lubricant depletion in heat-assisted-magnetic recording systems using a multiple-layered disk structure

Technical Paper


In this paper, we model the depletion of lubricant from a disk surface subject to heating by a scanning laser in a heat assisted magnetic recording (HAMR) system. A multi-layer disk structure is used consisting of the substrate (either glass or aluminum), the CoFe based soft magnetic under- layer, a Ru based intermediate layer, a CoCrPt based recording layer, the diamond-like-carbon layer, and the lubricant film. The thickness and material properties of the different layers are shown to play an important role in the conduction of heat from the top layer to the bottom layer and, consequently, in the lubricant depletion process due to heating by a scanning laser. The results show that it is critical to include realistic multi-layer disk structures in HAMR lubricant depletion modeling.


FePt Disk Surface Lubricant Film Disjoin Pressure Disk Structure 
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This work was supported in part by the Information Industry Storage Consortium’s Extremely High Density Recording Program, the National Nature Science Foundation of China (Grant No. 10972213), and a grant from the “One Hundred Talents Program” of the Chinese Academy of Science.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Department of Modern MechanicsUniversity of Science and Technology of ChinaHefeiChina
  2. 2.Department of Mechanical EngineeringUniversity of California at San DiegoLa JollaUSA

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