A parametric study of head-disk interface instability due to intermolecular forces
A parametric study of head-disk interface instability due to intermolecular forces
复制标题
分子间力引起的头盘界面不稳定性的参数研究
DOI：
10.1299/jsmemipe.2003.46
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发表时间：
2004
影响因子：
2.1
通讯作者：
D. Bogy
中科院分区：
文献类型：
--
作者：
B. H. Thornton;D. Bogy
本文提出了一种非线性动力学分析的头-盘界面，包括分子间的粘附力的亚5纳米飞行的空气轴承滑块。实验证据表明，实现超低飞行高度的主要障碍之一是磁头-磁盘界面的稳定性。研究发现，在磁头-磁盘界面的建模中考虑了磁头-磁盘间的分子间作用力，导致磁头的动态不稳定性。进行参数研究，显示稳定性/不稳定性对变量的依赖性。通过了解每个参数对稳定性的影响，我们可以获得气浮表面和磁盘形态系统的设计指南。从这项研究中，它被发现，头-盘界面可以变得不稳定，由于分子间的力量低于约6 nm的飞行高度。然而，从参数研究的结果，它表明，头-盘接口可以设计，使其最大限度地提高稳定性，虽然不稳定性不能完全衰减。通过最小化分子间粘附力和飞行高度调制，并通过最大化空气轴承刚度和阻尼，我们实现了最大的稳定性。此外，它被发现，空气轴承膜的刚性效应增加的稳定性。这项研究的影响是，头-盘界面的稳定性是显着妥协，在亚6纳米的飞行高度制度和“超光滑”磁盘的滑翔高度将不仅是一个函数的磁盘的形态，但也分子间的粘附力引起的不稳定的滑块。
This paper presents a nonlinear dynamic analysis of the head-disk interface by including intermolecular adhesion forces for sub-5-nm flying air-bearing sliders. Experimental evidence shows that one of the major roadblocks in achieving ultralow flying heights is the stability of the head-disk interface. It is found that the inclusion of intermolecular forces between the slider and disk in modeling the head-disk interface leads to dynamic instability of the slider. A parametric study is conducted showing the dependence of stability/instability on the variables. By understanding the effect each parameter has on stability, we can achieve air-bearing surface and disk morphology system design guidelines. From this study, it is found that the head-disk interface can become unstable due to intermolecular forces below a flying height of about 6 nm. However, from the results of the parametric study, it is shown that a head-disk interface can be designed such that it maximizes stability, although the instability cannot be attenuated completely. By minimizing the intermolecular adhesion forces and the flying-height modulation, and by maximizing the air-bearing stiffness and damping, we achieve maximum stability. Also, it is found that the stiffening effect of the air-bearing film increases the stability. The implications of this study are that the head-disk interface stability is dramatically compromised in the sub-6-nm flying-height regime and that the glide height of "super-smooth" disks will not only be a function of the disk's morphology, but also the intermolecular adhesion force induced instability of the slider.