利用现有技术的写入头有效地减小热辅助磁纪录中的过渡曲率
Efficiently reducing transition curvature in heat-assisted magnetic recording with state-of-the-art write heads
摘要：
颗粒介质上位跃迁的曲率是读回过程中的一个严重问题。我们解决这个基本问题，并提出了一种可能性，以有效地减少过渡曲率与国家的最先进的热辅助磁纪录（HAMR）头。我们比较传统的足迹与建议的头部设计在不同的介质，包括交换耦合和单相晶粒。此外，我们调查的各种记录参数的影响，如所施加的热脉冲的半高宽（FWHM）和记录颗粒的写入温度附近的矫顽力梯度。足迹是基于Landau-Lifshitz-Bloch（LLB）方程用粗粒度模型计算的。所提出的模拟结果表明，过渡曲率减少高达40%，在交换耦合晶粒和热脉冲的半高宽为40 nm的介质的情况下。我们进一步给出了位转换的拉直的原因，通过关于写过程的有效记录时间窗口（ERTW）的基本考虑。除了减少过渡曲率，建议的磁头设计产生了改善的过渡抖动在两个向下的轨道和偏离轨道的方向。
英文摘要：
The curvature of bit transitions on granular media is a serious problem for the read-back process. We address this fundamental issue and propose a possibility to efficiently reduce transition curvatures with state-of-the-art heat-assisted magnetic recording (HAMR) heads. We compare footprints of conventional with those of the proposed head design on different media, consisting of exchange coupled and single phase grains. Additionally, we investigate the impact of various recording parameters, like the full width at half maximum (FWHM) of the applied heat pulse and the coercivity gradient near the write temperature of the recording grains. The footprints are calculated with a coarse grained model, based on the Landau-Lifshitz-Bloch (LLB) equation. The presented simulations show a transition curvature reduction of up to 40 %, in the case of a medium with exchange coupled grains and a heat pulse with a FWHM of 40 nm. We further give the reason for the straightening of the bit transitions, by means of basic considerations with regard to the effective recording time window (ERTW) of the write process. Besides the transition curvature reduction the proposed head design yields an improvement of the transition jitter in both down-track and off-track direction.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
