Impact of radius and skew angle on areal density in heat assisted magnetic recording hard disk drives

被引:4
|
作者
Cordle, Michael [1 ,3 ]
Rea, Chris [2 ]
Jury, Jason [1 ]
Rausch, Tim [1 ]
Hardie, Cal [1 ]
Gage, Edward [1 ]
Victora, R. H. [3 ]
机构
[1] Seagate Technol, Storage Res Grp, Shakopee, MN 55379 USA
[2] Seagate Technol, Recording Head Operat, Bloomington, MN 55435 USA
[3] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA
关键词
D O I
10.1063/1.5007725
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
This study aims to investigate the impact that factors such as skew, radius, and transition curvature have on areal density capability in heat-assisted magnetic recording hard disk drives. We explore a "ballistic seek" approach for capturing in-situ scan line images of the magnetization footprint on the recording media, and extract parametric results of recording characteristics such as transition curvature. We take full advantage of the significantly improved cycle time to apply a statistical treatment to relatively large samples of experimental curvature data to evaluate measurement capability. Quantitative analysis of factors that impact transition curvature reveals an asymmetry in the curvature profile that is strongly correlated to skew angle. Another less obvious skew-related effect is an overall decrease in curvature as skew angle increases. Using conventional perpendicular magnetic recording as the reference case, we characterize areal density capability as a function of recording position. (C) 2017 Author(s).
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收藏
页数:5
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