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TECHNICAL PAPERS

An Investigation of Slider Vibrations in Near Contact Recording Using a Digital Laser Doppler Vibrometer

[+] Author and Article Information
Shinji Yonemura

Hitachi, Ltd., Japan, Kanagawa, Odawara, Kozu, 2880, Japan

Lin Zhou, Frank E. Talke

University of California San Diego, Center for Magnetic Recording Research (CMRR), 9500 Gilman Drive, La Jolla, CA 92093-0401, U.S.A.

J. Tribol 125(3), 571-575 (Jun 19, 2003) (5 pages) doi:10.1115/1.1540124 History: Received March 27, 2002; Revised August 06, 2002; Online June 19, 2003
Copyright © 2003 by ASME
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References

Figures

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Comparison of noise level of analog and digital LDV at low sampling frequency: (a) analog LDV (fs=200 kHz); and (b) digital LDV (fs=256 kHz).
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Comparison of noise level of analog and digital LDV at high sampling frequency: (a) analog LDV (fs=4 MHz); and (b) digital LDV (fs=5.12 MHz).
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Schematic illustration of an experimental setup
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Air bearing design and flying height of a slider: (a) air bearing surface; and (b) flying height as a function of disk speed.
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Spectrum of slider in-plane vibrations as a function of flying height at skew angle of 0 deg (0 dB=1 m): (a) h=7 nm; (b) h=6 nm; (c) h=5 nm; and (d) h=4 nm.
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Spectrum of slider out-of-plane vibrations as a function of flying height at skew angle of 0 degree (0 dB=1 m): (a) h=7 nm; (b) h=6 nm; (c) h=5 nm; and (d) h=4 nm.
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Spectrum of slider in-plane vibrations as a function of flying height at a skew angle of 10 degrees (0 dB=1 m): (a) h=7 nm; (b) h=6 nm; (c) h=5 nm; and (d) h=4 nm.
Grahic Jump Location
Spectrum of slider out-of-plane vibrations as a function of flying height at a skew angle of 10 degrees (0 dB=1 m): (a) h=7 nm; (b) h=6 nm; (c) h=5 nm; and (d) h=4 nm.
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AE signal intensity as a function of flying height
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Avalanche flying height of slider vibration detected by different observation methods

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