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Effects of Media Orientation on Noise, Track Width, and Thermal Relaxation

机译:介质取向对噪声,轨道宽度和热弛豫的影响

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A set of longitudinal antiferromagnetically coupled media with different orientation ratios (OR) was used to study the dependence of recorded data on OR. The OR dependence of dc and transition noise was investigated using a position-dependent time-domain technique. It is shown that both dc and transition noise decrease for a higher medium OR. A model for the dc erase noise power dependence on OR 's developed. We will demonstrate that a medium with lower OR has a larger baseline shift and larger effective track width due to an nereased cross-track magnetization component at the track edges. A strong dependence of media relaxation time on medium OR was liscovered with slower decay rates for higher OR media. These slow relaxation times give rise to anomalous track profiles with track ails extending over 2 microns away from the track center.
机译:使用一组具有不同取向比(OR)的纵向反铁磁耦合介质来研究记录数据对OR的依赖性。使用位置相关的时域技术研究了直流与跃迁噪声的或相关性。结果表明,对于较高的OR而言,dc和过渡噪声均会降低。开发了一种基于OR的直流擦除噪声功率依赖性模型。我们将证明具有较低OR的介质会由于磁道边缘处的跨磁道磁化分量增加而具有较大的基线偏移和较大的有效磁道宽度。发现对于较高OR介质,介质弛豫时间强烈依赖于介质OR,且衰减速率较慢。这些缓慢的弛豫时间会导致轨道轮廓异常,轨道钉距轨道中心的距离超过2微米。

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