NDLI: Microtribodynamics of pseudo-contacting head-disk interfaces intended for 1 Tbit/in/sup 2/

Content Provider	IEEE Xplore Digital Library
Author	Sung-Chang Lee Polycarpou, A.A.
Copyright Year	1965
Abstract	As the distance between the magnetic recording slider and the high-speed rotating disk decreases to few nanometers, it is critical to understand the tribological and dynamic interaction at the head-disk interface (HDI). Such interaction involves surface topography, adhesion, friction, and system dynamic coupling and is termed microtribodynamics. A two degree-of-freedom nonlinear dynamic model that includes realistic roughness, adhesion, and friction, as well as the dynamics of a flying and contacting HDI was developed to characterize a pseudo-contacting HDI, intended for 1 Tbit/in/sup 2/. While a fully flying HDI is intended to avoid contact, a pseudo-contact recording system is designed to fly at few nanometers using an air-bearing and at the same time some features of the air-bearing surface are designed to contact with the rotating disk during operation. The model was favorably compared with flyability measurements, and then applied to a pseudo-contacting interface to investigate adhesion, friction, and contact forces as well as bouncing vibration. Contrasting earlier studies adopting a simple Coulomb friction, the friction model used in this work calculates the friction force at the interface, accounting for roughness and adhesion. It was found that unlike a fully flying HDI, adhesion plays a positive role in attaining pseudo-contact recording by reducing bouncing vibrations.
Sponsorship	IEEE Magnetics Society
Starting Page	812
Ending Page	818
Page Count	7
File Size	551897
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Friction Adhesives Nonlinear dynamical systems Surface topography Vibration measurement Magnetic recording Rough surfaces Surface roughness Disk recording Force measurement tribology Adhesion friction head–disk interface (HDI) pseudo-contact recording
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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