Thermal stability of written bits in double-layered perpendicular recording media
Thermal stability of written bits in double-layered perpendicular recording media
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双层垂直记录介质写入比特的热稳定性
DOI：
10.1109/tmag.2002.801824
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
H. Fukushima
中科院分区：
文献类型：
--
作者：
Y. Nakatani;N. Hayashi;Y. Uesaka;H. Fukushima
通过微磁学模拟，比较了单层和双层垂直磁记录介质上写入比特的热稳定性。结果发现，虽然双层介质显示出比单层介质更高的热稳定性，但差异并不大。在这里使用的计算条件下，发现双层的热稳定性的增益对应于磁性颗粒的体积增加7.5%。还发现，这种差异在记录密度的低端和高端趋于减小。对施加在记录层中的静磁场的研究表明，热稳定性的变化是由于施加在记录层上的静磁场的层厚度分量的变化。虽然在易磁化轴的分散的增加被发现降低热稳定性，减少是在单层膜比双层膜。
The thermal stability of written bits on single- and double-layered perpendicular magnetic recording media were compared from micromagnetic simulation. It was found that, although double-layered media show a higher thermal stability than single-layered media, the difference is not large. Under the calculation conditions used here the gain in thermal stability by double-layering was found to correspond to 7.5% increase in the volume of a magnetic grain. It was also found that this difference tends to decrease at the low and high ends of recording density. Investigation of the magnetostatic field exerted in the recording layer shows that the change in the thermal stability is due to the change in the layer-thickness component of the static field exerted on the recording layer. Although the increase in the dispersion in the easy axes of magnetization was found to decrease thermal stability, the decrease was greater in single-layered films than double-layered films.