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首页> 外文期刊>IEEE Transactions on Magnetics >The role of disk surface waviness on baseline instability of MR head
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The role of disk surface waviness on baseline instability of MR head

机译:磁盘表面波纹度对MR头基线不稳定性的作用

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To investigate the role of disk surface waviness on the baseline instability (BLI) of the read-back signals from MR head, we measured the average height of surface waviness with a spatial wavelength of 0.4 to 5.0 mm using a white light interferometer instrument. We used an MR head over four sets of media to measure the baseline instability at OD and at MD. The results show that the baseline instability becomes worse as the surface waviness increases and that the baseline instability is linearly proportional to the surface waviness. The result further shows that the effect of bias current on the baseline instability is amplified on the disk with worse surface waviness. The surface waviness, therefore, can not be overlooked when evaluating the media for a high-performance hard disk drive.
机译:为了研究磁盘表面波纹度对来自MR磁头的回读信号的基线不稳定性(BLI)的作用,我们使用白光干涉仪测量了空间波长为0.4至5.0 mm的表面波纹度的平均高度。我们使用MR头对四组介质进行测量,以测量OD和MD时的基线不稳定性。结果表明,基线不稳定性随着表面波纹度的增加而变差,并且基线不稳定性与表面波纹度成线性比例。该结果进一步表明,偏置电流对基线不稳定性的影响在磁盘上被放大,表面波纹度更差。因此,在评估高性能硬盘驱动器的介质时,不能忽略表面起伏。

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