NDLI: Numerical Investigation of Thermal Problems in Heat-Assisted Magnetic Recording System

Content Provider	IEEE Xplore Digital Library
Author	Zhang, Q.D. Xu, B.X. Zhang, J. Liu, N.Y. Chin, G.L. Sundaravadivelu, K. Ong, E.H.
Copyright Year	1965
Abstract	This paper describes the numerical investigation of two thermal related problems in heat assisted magnetic recording: 1) the dependence of the recorded mark width on the laser power and 2) the temperature distribution of the lubricant layer and its variation with time and the change with and without the heat sink layer. It is found that the mark width increases with the increase of laser power, but the increase is not linear due to the Gaussian distribution of the laser intensity. It is also found that in certain power range, a smaller laser spot will generate a wider mark width at the same laser power. For lubricant cooling process, the temperature in lubricant layer decreases quickly after the laser is removed. Within 0.5 ns, the maximum temperature in lubricant layer drops 35.6degC when there is no heat sink layer applied under the recording media layer. With heat sink layer applied under the media layer, the temperature drop is even faster and decreases by 57.0degC in 0.5 ns. Hence, the heat sink layer is useful to quickly cool the lubricant layer to a thermally stable range.
Sponsorship	IEEE Magnetics Society
Starting Page	4962
Ending Page	4965
Page Count	4
File Size	254026
File Format	PDF
ISSN	00189464
Volume Number	45
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heat-assisted magnetic recording Heat sinks Power lasers Lubricants Magnetic recording Laser transitions Temperature distribution Gaussian distribution Power generation Cooling temperature distribution Heat-assisted magnetic recording (HAMR) heat transfer lubricant recorded mark simulation
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Head–Disk Lubricant Transfer and Deposition During Heat-Assisted Magnetic Recording Write Operations

Effect of Laser Heating Duration on Lubricant Depletion in Heat Assisted Magnetic Recording

Studies of Degradation and Decomposition Mechanisms of High Temperature Lubricants Undergoing Laser Irradiation

The Investigation of High Temperature Lubricants for HAMR Application

An Experimental Investigation on Curie Temperature Variations and Related Switching Field Distributions in Heat-Assisted Magnetic Recording Media

Experimental Study of Lubricant Depletion in Heat Assisted Magnetic Recording

Investigation of the Local Temperature Increase for Heat Assisted Magnetic Recording (HAMR)

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Lubrication for Heat-Assisted Magnetic Recording Media

Numerical Investigation of Thermal Problems in Heat-Assisted Magnetic Recording System

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