Head flying characteristics in heat assisted magnetic recording considering various nanoscale heat transfer models
Head flying characteristics in heat assisted magnetic recording considering various nanoscale heat transfer models
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DOI：
10.1063/1.5016873
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发表时间：
2018-01
影响因子：
3.2
通讯作者：
Yueqiang Hu;Haoyu Wu;Y. Meng;Yu Wang;D. Bogy
中科院分区：
文献类型：
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作者：
Yueqiang Hu;Haoyu Wu;Y. Meng;Yu Wang;D. Bogy
热辅助磁记录（HAMR）技术中的热问题在最近的文献中引起了广泛关注。本文对考虑头盘界面不同纳米级传热模型的 HAMR 系统在着陆过程中的头飞行特性和热性能进行了数值研究。首先描述光热机械耦合模型。发现近场换能器的耦合效率取决于磁头磁盘间隙。研究了恒定磁盘温度模型的缺点，揭示了将磁盘温度视为变量的重要性。使用空气传导模型和附加的近场传热模型对磁盘上飞行的磁头进行了研究。结果表明，当磁头磁盘界面充满由激光引起的堆积引起的固体材料时，传热系数会变得出乎意料地大，磁头的温度会升高...
The thermal issues in heat-assisted magnetic recording (HAMR) technology have drawn much attention in the recent literature. In this paper, the head flying characteristics and thermal performance of a HAMR system during the touch-down process considering different nanoscale heat transfer models across the head-disk interface are numerically studied. An optical-thermal-mechanical coupled model is first described. The coupling efficiency of the near field transducer is found to be dependent on the head disk clearance. The shortcomings of a constant disk-temperature model are investigated, which reveals the importance of considering the disk temperature as a variable. A study of the head flying on the disk is carried out using an air conduction model and additional near-field heat transfer models. It is shown that when the head disk interface is filled with a solid material caused by the laser-induced accumulation, the heat transfer coefficient can become unexpectedly large and the head's temperature can ris...