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首页> 外文期刊>IEEE Transactions on Magnetics >Data Rate Effects on Transition and Remanence Noise in a Modeled Heat-Assisted Magnetic Recording System
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Data Rate Effects on Transition and Remanence Noise in a Modeled Heat-Assisted Magnetic Recording System

机译：建模热辅助磁记录系统中数据速率对过渡和剩磁的影响

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摘要

The heat-assisted magnetic recording performance at varying data rate conditions is investigated using an ensemble waveform analysis method. This method decouples the transition signal-to-noise ratio (SNR) and the remanence SNR from the total spatial media SNR. For data rates below 2200 Mbpsi, transition and remanence noises are largely independent of writer field rise time (RT) values less than 150 ps. Above a data rate of 2200 Mbpsi, the transition SNR is significantly degraded for the slowest RTs considered. For all data rate values, the remanence SNR sees minimal degradation with increasing RT. At the highest data rate, at least a 1 dB loss is observed compared with the lowest data rate, across the RT range considered. For comparison, spin-stand data were also collected. The modeled results were contrasted to bit error rate (BER) trends obtained from the measurement. The spin-stand data show a significant BER degradation as a function of increasing RT at higher data rates. This trend is likely explained with the increase in transition noise observed in the model. These results suggest that moderate writer field RTs do not degrade either transition or remanence noise significantly. If RTs can be kept low, higher data rates may be allowable from a media noise perspective.
机译：使用集成波形分析方法研究了在不同数据速率条件下的热辅助磁记录性能。该方法将过渡信噪比（SNR）和剩余SNR与总空间媒体SNR分离。对于低于2200 Mbpsi的数据速率，过渡噪声和剩余噪声在很大程度上与小于150 ps的写入器场上升时间（RT）值无关。高于2200 Mbpsi的数据速率时，对于所考虑的最慢的RT，转换SNR会大大降低。对于所有数据速率值，剩磁SNR随RT的增加而降级最小。在考虑的RT范围内，与最低数据速率相比，在最高数据速率下观察到至少1 dB的损耗。为了进行比较，还收集了旋转支架数据。将建模结果与从测量中获得的误码率（BER）趋势进行对比。自旋支架数据显示出较高的数据速率下，BER显着下降，这是RT增大的函数。在模型中观察到的过渡噪声增加可能解释了这种趋势。这些结果表明，适度的写入器场RT不会显着降低过渡噪声或剩磁。如果可以将RT保持在较低水平，则从媒体噪声的角度来看，可以允许更高的数据速率。

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