Title :
HAMR thermal modeling including media hot spot
Author :
Huang, Liwen ; Stipe, Barry ; Staffaroni, Matteo ; Hirano, Takuichi ; Schreck, Erhard ; Huang, F.Y.
Author_Institution :
HGST, Western Digital Co., Philippines
fDate :
Oct. 31 2012-Nov. 2 2012
Abstract :
All previous thermal modeling on heat exchange between HDD head and media treated media as a heat sink with uniform ambient temperature. However in HAMR system, the media temperature is no longer uniform and the temperature at the hot spot center can reach as high as 800 to 1000K. 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 metallic near-field transducer (NFT) are presented to illustrate the effect of HAMR media temperature.
Keywords :
disc drives; hard discs; heat transfer; magnetic heads; HAMR thermal modeling; HDD head; air bearing flow; head-media interface; heat exchange; heat sink; heat transfer; hot spot center; media hot spot; media temperature; metallic near-field transducer; temperature 800 K to 1000 K; uniform ambient temperature; Head; Heat transfer; Heat-assisted magnetic recording; Heating; Magnetic heads; Media; Surface waves; air-bearing surface (ABS); head-disk interface (HDI); heat-assisted magnetic recording (HAMR); media hot-spot;
Conference_Titel :
APMRC, 2012 Digest
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-4734-1
