Microsystem Technologies

, Volume 19, Issue 2, pp 291–297 | Cite as

Experimental study of lubricant depletion in heat assisted magnetic recording: effects of laser heating duration and temperature

Technical Paper

Abstract

Heat assisted magnetic recording (HAMR) is a promising approach to overcome the superparamagnetic limit in magnetic recording and enable large increases in the storage density of hard disk drives. However, it is expected that HAMR causes lubricant depletion problem on disk surface under the high temperature in the heating assisted writing process. In this study, the effects of laser heating duration and laser heating temperature on lubricant depletion are studied experimentally. It is found that lubricant depletion depth is linearly proportional to the logarithm of laser heating duration. Lubricant depletion can be mitigated effectively by lowering laser heating temperature. Lubricant depletion depth over the life-time of the drive is also predicted.

References

  1. Kryder MH, Gage EC, McDaniel TW, Challener WA, Rottmayer RE, Ju G, Yiao-Tee Hsia, Erden MF (2008) Heat assisted magnetic recording. Proc IEEE 96:1810–1835CrossRefGoogle Scholar
  2. Lei RZ, Gellman AJ, Jones P (2001) Thermal stability of Fomblin Z and Fomblin Zdol thin films on amorphous hydrogenated carbon. Tribol Lett 11:1–5CrossRefGoogle Scholar
  3. Lim MS, Gellman AJ (2005) Kinetics of laser induced desorption and decomposition of Fomblin Zdol on carbon overcoats. Tribol Int 38:554–561CrossRefGoogle Scholar
  4. Ma YS (2010) Method to simulate HAMR conditions with a stand-alone continuous wave laser in Disclosure of Data Storage Institute, SingaporeGoogle Scholar
  5. Ma YS, Liu B (2007) Lubricant transfer from disk to slider in hard disk drives. Appl Phys Lett 90:143516CrossRefGoogle Scholar
  6. Ma YS, Liu B (2008a) Lube depletion caused by thermal-desorption in heat assisted magnetic recording. IEEE Trans Magn 44:3691–3694CrossRefGoogle Scholar
  7. Ma YS, Liu B (2008b) A theoretical study of vapor lubrication for heat assisted magnetic recording. Tribol Lett 32:215–220MathSciNetCrossRefGoogle Scholar
  8. Ma YS, Gongaza L, An CW, Liu B (2011) Effect of laser heating duration on lubricant depletion in heat assisted magnetic recording. IEEE Trans Magn 47:3445–3448CrossRefGoogle Scholar
  9. Ma YS, Chen XY, Zhao JM, Yu SK, Liu B, Seet HL, Ng KK, Hu JF, Shi JZ (2012a) Experimental study of lubricant depletion in heat assisted magnetic recording. IEEE Trans Magn 48:1813–1818CrossRefGoogle Scholar
  10. Ma YS, Chen XY, Liu B (2012b) Experimental study of lubricant depletion in heat assisted magnetic recording over the lifetime of the drive. Tribol Lett 47:175–182CrossRefGoogle Scholar
  11. Paserba KR, Gellman AJ (2001a) Desorption kinetics and energetics of monodisperse fomblin Zdol from carbon surfaces. J Phys Chem B 105:12105–12110CrossRefGoogle Scholar
  12. Paserba KR, Gellman AJ (2001b) Kinetics and energetics of oligomer desorption from surfaces. Phys Rev Lett 86:4338–4341CrossRefGoogle Scholar
  13. Tagawa N, Kakitani R, Tani H, Iketani N, Nakano I (2009) Study of lubricant depletion induced by laser heating in thermally assisted magnetic recording systems—Effect of lubricant film materials. IEEE Trans Magn 45:877–882CrossRefGoogle Scholar
  14. Tagawa N, Andoh H, Tani H (2010) Study on lubricant depletion induced by laser heating in thermally assisted magnetic recording systems: effect of lubricant thickness and bonding ratio. Tribol Lett 37:411–418CrossRefGoogle Scholar
  15. Tagawa N, Kakitani R, Tani H, Iketani N, Nakano I (2011) Lubricant depletion characteristics induced by rapid laser heating in thermally assisted magnetic recording. IEEE Trans Magn 47:105–110CrossRefGoogle Scholar
  16. Weller D, Moser A (1999) Thermal effect limits in ultrahigh-density magnetic recording. IEEE Trans Magn 35:4423–4439CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Data Storage InstituteA*STAR (Agency for Science, Technology and Research)SingaporeSingapore

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