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Back heating effect of media hot spot at nanoscale head–disk interface

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Abstract

Heat-assisted magnetic recording (HAMR) is one of prospective high density recording technologies in current hard disk industry due to its theoretical potential. In this paper, we develop a new heat transfer model which enables us to predict near field thermal conduction and radiation across head–disk interface accurately. This new model, together with an Ansys finite element (FE) model for an integrated HAMR slider and an optical absorption model for temperature profile of media hot spot, is then used to solve for temperature rise and thermal protrusion on the slider body. Our simulation studies show that larger hot spot and smaller head–disk spacing will increase the temperature and thermal protrusion on the slider’s head components. When thermal radiation effect is further considered, this increment in temperature and protrusion becomes more significant; especially at very small gap below 1 nm. Therefore, the back heating effect from media hot spot should be addressed carefully for improving the reliability of HAMR head–disk interface.

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Acknowledgments

This work is supported by the ‘Scientific Staff Development Award’ from Data Storage Institute, Agency for Science, Technology and Research (A*STAR) Singapore, awarded to K. S. Myo. The authors would like to thank Dr. S. Yu and Dr. W. Hua for discussions and comments to improve the manuscript.

The author P. Yu would like to thank the financial support from National Natural Science Foundation of China (Grant No. 11542015).

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Authors and Affiliations

  1. Data Storage Institute, (A*STAR) Agency for Science, Technology and Research, 2 Fusionopolis Way, #08-01 Innnovis, Singapore, 138634, Singapore

    Kyaw Sett Myo & Weidong Zhou

  2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore

    Kyaw Sett Myo & Xiaoyang Huang

  3. Department of Mechanics and Aerospace Engineering, South University of Science and Technology of China, 1088 Xueyuan Boulevard, Nanshan District, Shenzhen, 51805, Guangdong, People’s Republic of China

    Peng Yu

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  1. Kyaw Sett Myo
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  2. Weidong Zhou
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  3. Xiaoyang Huang
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  4. Peng Yu
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Correspondence to Kyaw Sett Myo.

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Myo, K.S., Zhou, W., Huang, X. et al. Back heating effect of media hot spot at nanoscale head–disk interface. Microsyst Technol 23, 2587–2597 (2017). https://doi.org/10.1007/s00542-016-3107-9

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  • DOI: https://doi.org/10.1007/s00542-016-3107-9

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