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Investigation of Nanoscale Heat Transfer and Flying Characteristics in Thermal Flying Height Control Sliders Considering Near-Field Radiation

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Abstract

Nanoscale heat transfer at the head/disk interface is investigated for thermal flying height control sliders in hard disk drives. Near-field radiation effects due to evanescent photo tunneling are considered in addition to thermal conduction. It is found that the maximum value of the heat flux due to near-field thermal radiation is comparable to that from heat conduction. Near-field thermal radiation is shown to cause a decrease in the thermal protrusion, resulting in a larger flying height than predicted for the case that near-field radiation is neglected. Results from this study are useful for the design of high-performance disk drives.

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Acknowledgments

We gratefully acknowledge the help of Prof. Z.M. Zhang from Georgia Institute of Technology in the calculation of near-field thermal radiation and helpful discussions with Prof. Lubarda from UCSD.

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Authors and Affiliations

  1. University of California, San Diego, La Jolla, CA, 92093-0401, USA

    Longqiu Li & Frank E. Talke

  2. Harbin Institute of Technology, Harbin, 150001, China

    Longqiu Li

  3. West Digital Corporation, San Jose, CA, USA

    Hao Zheng

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  1. Longqiu Li
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  2. Hao Zheng
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  3. Frank E. Talke
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Correspondence to Longqiu Li.

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Li, L., Zheng, H. & Talke, F.E. Investigation of Nanoscale Heat Transfer and Flying Characteristics in Thermal Flying Height Control Sliders Considering Near-Field Radiation. Tribol Lett 59, 12 (2015). https://doi.org/10.1007/s11249-015-0546-x

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