HAMR Thermal Modeling Including Media Hot Spot

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...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2013-06, Vol.49 (6), p.2565-2568
Main Authors: Lidu Huang, Stipe, B., Staffaroni, M., Jia-Yang Juang, Hirano, T., Schreck, E., Fu-Ying Huang
Format: Article
Language:English
Subjects:
Air-bearing surface (ABS)
Atmospheric modeling
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
head-disk interface (HDI)
Heat transfer
Heat-assisted magnetic recording
heat-assisted magnetic recording (HAMR)
Heating
Magnetic heads
Magnetism
Materials science
Media
media hot-spot
Other topics in materials science
Physics
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Description
Summary: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.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2013.2252886