Duty Cycle Effects in Z-Tetraol Reflow in Heat-Assisted Magnetic Recording

Lubricant reflow for 10 Å Z-Tetraol film is characterized for heat-assisted magnetic recording by numerical simulation using the experimentally determined thickness-dependent diffusion equation. The competition between laser-induced lubricant depletion (troughs) and subsequent healing by r...

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Autor principal: Robert J. Waltman
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Lenguaje:EN
Publicado: Japanese Society of Tribologists 2016
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spelling oai:doaj.org-article:89ae944039f94866b958128b72761f1a2021-11-05T09:21:20ZDuty Cycle Effects in Z-Tetraol Reflow in Heat-Assisted Magnetic Recording1881-219810.2474/trol.11.503https://doaj.org/article/89ae944039f94866b958128b72761f1a2016-07-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/11/4/11_503/_pdf/-char/enhttps://doaj.org/toc/1881-2198Lubricant reflow for 10 Å Z-Tetraol film is characterized for heat-assisted magnetic recording by numerical simulation using the experimentally determined thickness-dependent diffusion equation. The competition between laser-induced lubricant depletion (troughs) and subsequent healing by reflow is investigated as a function of lubricant depletion rate, trough width, trough depth, and duty cycle (reflow time between successive laser exposures). The simulations include 1, 5, 9 and 13 adjacent troughs. Trough width of 50 nm with an edge-to-edge separation distance of 50 nm and laser depletion rates of 1.0, 0.1 and 0.001 Å/cycle are simulated. Reflow kinetics on 13 troughs with a trough width of 20 nm and an edge-to-edge separation distance of 20 nm is also included to probe the effects in the limit of very small laser spots. Duty cycles of 10 and 100 millisec are used in the simulations. The results of the numerical simulations indicate that trough recovery by reflow increases with increasing duty cycle or decreasing number of adjacent troughs, trough separation distance and laser depletion rate. Conclusions based upon single trough studies are misleading for HAMR interfaces.Robert J. WaltmanJapanese Society of Tribologistsarticlez-tetraolhard disk drivesheat-assisted magnetic recordingreflowdiffusionPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 11, Iss 4, Pp 503-511 (2016)
institution DOAJ
collection DOAJ
language EN
topic z-tetraol
hard disk drives
heat-assisted magnetic recording
reflow
diffusion
Physics
QC1-999
Engineering (General). Civil engineering (General)
TA1-2040
Mechanical engineering and machinery
TJ1-1570
Chemistry
QD1-999
spellingShingle z-tetraol
hard disk drives
heat-assisted magnetic recording
reflow
diffusion
Physics
QC1-999
Engineering (General). Civil engineering (General)
TA1-2040
Mechanical engineering and machinery
TJ1-1570
Chemistry
QD1-999
Robert J. Waltman
Duty Cycle Effects in Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
description Lubricant reflow for 10 Å Z-Tetraol film is characterized for heat-assisted magnetic recording by numerical simulation using the experimentally determined thickness-dependent diffusion equation. The competition between laser-induced lubricant depletion (troughs) and subsequent healing by reflow is investigated as a function of lubricant depletion rate, trough width, trough depth, and duty cycle (reflow time between successive laser exposures). The simulations include 1, 5, 9 and 13 adjacent troughs. Trough width of 50 nm with an edge-to-edge separation distance of 50 nm and laser depletion rates of 1.0, 0.1 and 0.001 Å/cycle are simulated. Reflow kinetics on 13 troughs with a trough width of 20 nm and an edge-to-edge separation distance of 20 nm is also included to probe the effects in the limit of very small laser spots. Duty cycles of 10 and 100 millisec are used in the simulations. The results of the numerical simulations indicate that trough recovery by reflow increases with increasing duty cycle or decreasing number of adjacent troughs, trough separation distance and laser depletion rate. Conclusions based upon single trough studies are misleading for HAMR interfaces.
format article
author Robert J. Waltman
author_facet Robert J. Waltman
author_sort Robert J. Waltman
title Duty Cycle Effects in Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_short Duty Cycle Effects in Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_full Duty Cycle Effects in Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_fullStr Duty Cycle Effects in Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_full_unstemmed Duty Cycle Effects in Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_sort duty cycle effects in z-tetraol reflow in heat-assisted magnetic recording
publisher Japanese Society of Tribologists
publishDate 2016
url https://doaj.org/article/89ae944039f94866b958128b72761f1a
work_keys_str_mv AT robertjwaltman dutycycleeffectsinztetraolreflowinheatassistedmagneticrecording
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