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Lubricant Thermodiffusion in Heat Assisted Magnetic Recording

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2 Author(s)
Marchon, B. ; San Jose Res. Center, Hitachi GST, San Jose, CA, USA ; Saito, Y.

Molecular dynamics modeling of lubricant displacement on a disk during transient heating in a heat assisted recording interface is presented. It is found that in the time and dimension scales expected for high density recording (nanosecond, tens of nanometers), a significant lubricant removal from the heat spot center can occur, leading to the formation of a rim around it. Continuum fluid dynamics calculations were also performed using a temperature dependent Hamaker constant for lubricant-lubricant interactions. These results were in good agreement with the molecular dynamics predictions.

Published in:

Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )

Date of Publication:

Nov. 2012

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