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TECHNICAL PAPERS

Investigation of Slider Vibrations Due to Contact With a Smooth Disk Surface

[+] Author and Article Information
Hidekazu Kohira

Data Storage & Retrieval Systems Division, Hitachi Ltd., 2880 Kozu, Odawara-shi, Kanagawa-ken, 256-8510, Japane-mail: h-kohira@str.hitachi.co.jp

Hideaki Tanaka, Masaaki Matsumoto, Frank E. Talke

Center for Magnetic Recording Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0401

J. Tribol 123(3), 616-623 (Jul 12, 2000) (8 pages) doi:10.1115/1.1308045 History: Received February 29, 2000; Revised July 12, 2000
Copyright © 2001 by ASME
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References

Figures

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Schematic of experimental setup
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Displacement of slider C versus time. Top: point A near trailing edge. Bottom: point B near leading edge. 3a: 5 m/s; 3b: 3.5 m/s; 3c: 2 m/s.
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Power spectral density of vibrations for slider C measured at point A
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Frequency dependence on velocity, slider C and disk D
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Magnitude of “f1” frequency along slider width, slider C, and disk D, 3.5 m/s
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Magnitude of “f2” frequency along slider length, slider C, and disk D, 3.5 m/s
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Displacement of slider E versus time. Top: point A near trailing edge. Bottom: point B near leading edge. 8a: 7 m/s; 8b: 5 m/s; 3c: 3.5 m/s.
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Power spectral density of vibrations for slider E measured at point A
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3σ of displacement for point A near trailing edge versus time, disk D
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3σ of displacement for point A near trailing edge versus pitch angle, disk D
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3σ of displacement for point A near trailing edge versus crown height, disk D
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Slider/disk contact conditions. Top: large pitch angle and zero crown. Middle: low pitch angle and large crown. Bottom: contact at leading edge.
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a, Velocity and displacement of slider D at point A versus time. Top: velocity. Bottom: displacement, disk D, 3.5 m/s. b, short-time Fourier transform of the displacement of slider D at point A, disk D, 3.5 m/s.
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Glide avalanche height of sample sliders measured using slider C versus lubricant thickness
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Velocity and displacement of slider C at point A at disk velocity of 3.5 m/s versus time. a, lubricant thickness: 1.5 nm; b, 2.5 nm; c, 3.5 nm.
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Top: flying height without lubricant (17a). Middle: flying height with uniform lubricant (17b). Bottom: flying height with scattered lubricant (17c).

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