Interface solution for writing-induced nano-deformation of slider body

The laser diode (LD) is a key component in thermally assisted magnetic recording (TAMR) systems. However, heating from the LD can induce thermal deformation of the slider assembly, and change the gap separation between the slider and disk medium. In this paper, we analyzed the relationship between the slider–medium gap and the optical efficiency of the TAMR head, by considering the thermal effects of epoxy, the adhesive layer, and the near-field transducer (NFT) on the TAMR slider. The epoxy effect was modeled by using finite element (FE) analysis. Five different epoxy models were simulated, and the optimal epoxy model was selected, on the basis of its thermal performance. FE analysis was also carried out to simulate the TAMR slider assembly, which consisted of the LD, NFT, adhesive layer, epoxy, and TAMR head. On the basis of iterative analysis, an FE model was constructed with optimized representation of the epoxy, TAMR head component, and NFT. Thermal analysis of the simulation representation indicated that the epoxy, adhesive layer, and NFT played a significant role in the performance of the TAMR system.

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“…Therefore, the change in the gap between the slider and the medium can be calculated using the thin-film lubricant gas equation. [24][25][26][27]…”

Section: Simulation Methodsmentioning

confidence: 99%

Study of Flying Stability of a Thermally Assisted Magnetic Recording System with Laser Diode Mount Light Delivery

Choi

Park

et al. 2013

Jpn. J. Appl. Phys.

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Wear Modeling of Nanometer Thick Protective Coatings

Lee

Zhang

Crone

et al. 2016

Journal of Tribology

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Use of nanometer thin films has received significant attention in recent years because of their advantages in controlling friction and wear. There have been significant advances in applications such as magnetic storage devices, and there is a need to explore new materials and develop experimental and theoretical frameworks to better understand nanometer thick coating systems, especially wear characteristics. In this work, a finite element model is developed to simulate the sliding wear between the protruded pole tip in a recording head (modeled as submicrometer radius cylinder) and a rigid asperity on the disk surface. Wear is defined as plastically deformed asperity and material yielding. Parametric studies reveal the effect of the cylindrical asperity geometry, material properties, and contact severity on wear. An Archard-type wear model is proposed, where the wear coefficients are directly obtained through curve fitting of the finite element model, without the use of an empirical coefficient. Limitations of such a model are also discussed.

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Interface solution for writing-induced nano-deformation of slider body

Cited by 2 publications

References 13 publications

Study of Flying Stability of a Thermally Assisted Magnetic Recording System with Laser Diode Mount Light Delivery

Study of Flying Stability of a Thermally Assisted Magnetic Recording System with Laser Diode Mount Light Delivery

Wear Modeling of Nanometer Thick Protective Coatings

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