Z-Tetraol Reflow in Heat-Assisted Magnetic Recording

Lubricant reflow for Z-Tetraol is characterized for heat-assisted magnetic recording (HAMR). The thickness-dependent diffusion constant, D(h), is determined from flow experiments for submonolayer Z-Tetraol films between 2.5 and 13 Å. Fickian diffusion using experimental D(h) values are us...

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Autor principal:	Robert J. Waltman
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2016
Materias:	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
Acceso en línea:	https://doaj.org/article/8d4232d1b0a042d4a37ec2574f2866c6
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spelling	oai:doaj.org-article:8d4232d1b0a042d4a37ec2574f2866c62021-11-05T09:21:50ZZ-Tetraol Reflow in Heat-Assisted Magnetic Recording1881-219810.2474/trol.11.50https://doaj.org/article/8d4232d1b0a042d4a37ec2574f2866c62016-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/11/1/11_50/_pdf/-char/enhttps://doaj.org/toc/1881-2198Lubricant reflow for Z-Tetraol is characterized for heat-assisted magnetic recording (HAMR). The thickness-dependent diffusion constant, D(h), is determined from flow experiments for submonolayer Z-Tetraol films between 2.5 and 13 Å. Fickian diffusion using experimental D(h) values are used to numerically simulate lubricant reflow into HAMR laser-depleted troughs as a function of trough number, trough depth, trough distance and trough width. Reflow is computed to be slower for multiple, wider and deeper troughs. Reflow kinetics as a function of trough separation distance is complicated by adjacent trough interactions. Two major kinetic regimes are identified. Multiple troughs that have not coalesced recover more quickly. Once multiple troughs coalesce into a single larger trough, reflow kinetics is drastically slowed. The crossover time between the two kinetic regimes is computed to be approximately 400 millisec for the system under investigation here, but will be a strong function of trough number, width, depth and separation distances. The simulation of multiple troughs provides significant insight into HAMR conditions. Single trough lubricant studies may be misleading for HAMR systems.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 1, Pp 50-60 (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 Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
description	Lubricant reflow for Z-Tetraol is characterized for heat-assisted magnetic recording (HAMR). The thickness-dependent diffusion constant, D(h), is determined from flow experiments for submonolayer Z-Tetraol films between 2.5 and 13 Å. Fickian diffusion using experimental D(h) values are used to numerically simulate lubricant reflow into HAMR laser-depleted troughs as a function of trough number, trough depth, trough distance and trough width. Reflow is computed to be slower for multiple, wider and deeper troughs. Reflow kinetics as a function of trough separation distance is complicated by adjacent trough interactions. Two major kinetic regimes are identified. Multiple troughs that have not coalesced recover more quickly. Once multiple troughs coalesce into a single larger trough, reflow kinetics is drastically slowed. The crossover time between the two kinetic regimes is computed to be approximately 400 millisec for the system under investigation here, but will be a strong function of trough number, width, depth and separation distances. The simulation of multiple troughs provides significant insight into HAMR conditions. Single trough lubricant studies may be misleading for HAMR systems.
format	article
author	Robert J. Waltman
author_facet	Robert J. Waltman
author_sort	Robert J. Waltman
title	Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_short	Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_full	Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_fullStr	Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_full_unstemmed	Z-Tetraol Reflow in Heat-Assisted Magnetic Recording
title_sort	z-tetraol reflow in heat-assisted magnetic recording
publisher	Japanese Society of Tribologists
publishDate	2016
url	https://doaj.org/article/8d4232d1b0a042d4a37ec2574f2866c6
work_keys_str_mv	AT robertjwaltman ztetraolreflowinheatassistedmagneticrecording
_version_	1718444423160791040

Z-Tetraol Reflow in Heat-Assisted Magnetic Recording

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