The Scaling Capability of Heat Assisted Magnetic Recording

被引:1
|
作者
Xu, Lei [1 ]
Brockie, Richard M. [1 ]
Natekar, Niranjan A. [1 ]
Roddick, Eric [1 ]
机构
[1] Western Digital Corp, San Jose, CA 95119 USA
关键词
Media; Heat-assisted magnetic recording; Thermal stability; Writing; Grain size; Signal to noise ratio; Heating systems; Dynamic effects; heat-assisted magnetic recording (HAMR); magnetic field; switching behavior; thermal field;
D O I
10.1109/TMAG.2022.3221782
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
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% 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 KuV/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).
引用
收藏
页数:7
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