In current hard disk drives, the spacing between the slider and the disk is reduced to the order of 1–2 nm. At such a narrow spacing, intermolecular forces at the head-disk interface play an important role in achieving a stable slider-disk interface. Even in the absence of actual head-disk contact, lubricant transfer between a slider and a disk may occur. Transferred lubricant can change the flying characteristics of the slider in subsequent read-write operations. It is therefore apparent that lubricant transfer at the head-disk interface is undesirable. In this paper, molecular dynamics simulations were performed to investigate lubricant transfer between a slider and a disk. A so-called coarse-grained bead spring (CGBS) model was implemented. In this model, the Lennard-Jones potential, the short-range polar attractive potential, and the finitely extensible nonlinear elastic potential functions were used to describe the intermolecular interactions at the head-disk interface. Also, in order to develop a realistic model of the carbon overcoat, different modeling approaches are discussed, including the use of rigid coarse-grained beads and a 3-body Tersoff potential function.
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ASME 2014 Conference on Information Storage and Processing Systems
June 23–24, 2014
Santa Clara, California, USA
Conference Sponsors:
- Information Storage and Processing Systems Division
ISBN:
978-0-7918-4579-0
PROCEEDINGS PAPER
Modeling of Amorphous Carbon Overcoat for Investigation of Lubricant Transfer at the Head-Disk Interface
Young Woo Seo,
Young Woo Seo
University of California, San Diego, La Jolla, CA
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Frank E. Talke
Frank E. Talke
University of California, San Diego, La Jolla, CA
Search for other works by this author on:
Young Woo Seo
University of California, San Diego, La Jolla, CA
Frank E. Talke
University of California, San Diego, La Jolla, CA
Paper No:
ISPS2014-6989, V001T01A023; 3 pages
Published Online:
August 15, 2014
Citation
Seo, YW, & Talke, FE. "Modeling of Amorphous Carbon Overcoat for Investigation of Lubricant Transfer at the Head-Disk Interface." Proceedings of the ASME 2014 Conference on Information Storage and Processing Systems. 2014 Conference on Information Storage and Processing Systems. Santa Clara, California, USA. June 23–24, 2014. V001T01A023. ASME. https://doi.org/10.1115/ISPS2014-6989
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