The Scaling Capability of Heat Assisted Magnetic Recording

Lei Xu; Richard M. Brockie; Niranjan A. NatekarEric Roddick

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The Scaling Capability of Heat Assisted Magnetic Recording

机译：The Scaling Capability of Heat Assisted Magnetic Recording

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摘要

In this study, we analyze the scaling potential of heat-assisted magnetic recording (HAMR) and the factors ostensibly preventing scaling. In principle, as each length in the problem scales by a factor of $1/x$ , we would expect the areal density (AD) of the system to scale as ${x}^{2}$ . To underpin the 20#x0025; CAGR expectation in the ASRC roadmap, we present a numerical investigation of HAMR where we consider the scaling of grain density, thermal spot size, reader dimensions, media velocity, and other factors. We also evaluate the relative importance of these scaling factors and assess the effect of ${K}_{u}{V}{/}{kT}$ on writing. The results show that reader, grain density, and thermal spot scaling are more critical in realistic HAMR systems. Finally, we highlight the importance of improving the reader by varying the width and the head electronic signal-to-noise ratio (HESNR).

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来源
《IEEE Transactions on Magnetics》 |2023年第1期|3200707-1-3200707-7|共7页
作者
Lei Xu; Richard M. Brockie; Niranjan A. NatekarEric Roddick;
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作者单位

Western Digital Corporation;

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原文格式 PDF
正文语种英语
中图分类电工技术;
关键词
Dynamic effects; heat-assisted magnetic recording (HAMR); magnetic field; switching behavior; thermal field; Media; Heat-assisted magnetic recording; Thermal stability; Writing; Grain size; Signal to noise ratio; Heating systems;

The Scaling Capability of Heat Assisted Magnetic Recording

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