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HAMR Thermal Modeling Including Media Hot Spot

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7 Author(s)
Huang, L.$^{1}$ San Jose Research Center, , HGST, a Western Digital Company,, San Jose,, CA , USA ; Stipe, B. ; Staffaroni, M. ; Juang, J.-Y.
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All previous thermal modeling on heat exchange between hard disk drive (HDD) head and media treated media as a heat sink with uniform ambient temperature. However in heat-assisted magnetic recording (HAMR) system, the media temperature is no longer uniform and the temperature at the hot spot center can reach as high as 800 to 1000 K depending on recording layer's Curie temperature. In this paper, both media hot spot and the air bearing flow are included in formulating heat transfer across the head-media interface. Numerical results for a waveguide only slider and a slider with a metallic near-field transducer (NFT) are presented to illustrate the effect of HAMR media temperature.

Published in:

Magnetics, IEEE Transactions on  (Volume:49 ,  Issue: 6 )

Date of Publication:

June 2013

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