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

fYear

2012

fDate

Oct. 31 2012-Nov. 2 2012

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

APMRC, 2012 Digest

Conference_Location

Singapore

Print_ISBN

978-1-4673-4734-1

Type

conf

Filename

6407582