Static and dynamic flying characteristics of a slider on bitpatterned media (dynamic responses based on frequency domain analysis)
Static and dynamic flying characteristics of a slider on bitpatterned media (dynamic responses based on frequency domain analysis)
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位图介质上滑块的静态和动态飞行特性（基于频域分析的动态响应）
DOI：
10.1007/s00542-012-1601-2
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发表时间：
2012
影响因子：
2.1
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
Fukui;S.;Sato;A. and Matsuoka;H.
具有凹槽的记录介质，例如离散轨道介质（DTM）和位图案化介质（BPM），被认为是用于实现可重复记录密度的有前景的介质。因此，在DTM和BPM上利用分子气膜润滑方程和货车德瓦尔斯（vdW）方程分析浮动头滑块的静动态特性具有重要意义。在这项研究中，我们认为BPM与矩形位。我们表示为一个傅立叶级数的磁盘凹槽，并确定准静态和时间相关的组件。我们还开发了一个小槽深度的扰动方法计算静态滑块的姿态和动态响应在频域。计算结果表明，沟槽的存在将显著降低准静态飞行高度。对于小槽深hgroove，浮动高度减小量Δ h0与均匀盘槽的Fourier级数展开值基本一致，这也与经验结果一致。通过频域分析获得的动态滑块特性对于遭受几十kHz激励的滑块是有用的，例如在数据区和伺服区之间的过渡处飞行的滑块，尽管由实际BPM介质引起的动态间距波动是可以忽略的。
Recording media with grooves, such as discrete track media (DTM) and bit-patterned media (BPM), are considered to be promising media for achieving ultrahigh recording densities. It is thus important to analyze the static and dynamic characteristics of flying head sliders on DTM and BPM using the molecular gas film lubrication equation and the van der Waals (vdW) equation. In this study, we consider BPM with rectangular bits. We express the disk recess as a Fourier series and determine the quasi-static and time-dependent components. We also develop a perturbation method for small groove depths for calculating static slider attitudes and dynamic responses in the frequency domain. The numerical results predict that the grooves will significantly reduce the quasi-static flying heighth0. They also predict that for a small groove depthhgroove, flying height decrease Δh0almost agree with the value of uniform disk recess obtained by a Fourier series expansion, which also agrees with empirical results. Dynamic slider characteristics obtained by the frequency domain analysis is useful for sliders suffering from excitations of several tens of kHz such as sliders flying at transition between data zone and servo zone, although the dynamic spacing fluctuation by realistic BPM media is negligible.