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Updated: Feb 15, 2026

Electrostatic Method to Remove Particulate Organic Matter from Soil
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Electrostatically Tunable Adhesion in a High Speed Sliding Interface.

Sukumar Rajauria1, Oscar Ruiz1, Sripathi V Canchi1

  • 1Western Digital Company, Recording Sub System Staging and Research, San Jose, California 95135, USA.

Physical Review Letters
|January 30, 2018
PubMed
Summary
This summary is machine-generated.

Contact hysteresis in sliding systems can be suppressed. Applying AC voltage to induce head oscillation in hard disk drives eliminates stiction, even at high speeds.

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Area of Science:

  • Tribology
  • Nanotechnology
  • Materials Science

Background:

  • Contact hysteresis is a common phenomenon in sliding interfaces across various scales.
  • Previous research primarily utilized atomic force microscopy (AFM) at low sliding speeds (μm/s).

Purpose of the Study:

  • To investigate stiction and contact hysteresis at the head-disk interface of hard disk drives.
  • To explore the effect of electrostatic forces, specifically AC voltage-induced oscillations, on contact hysteresis at high sliding speeds.

Main Methods:

  • Studied the head-disk interface of commercial hard disk drives.
  • Applied DC and AC voltages to the interface.
  • Analyzed the effect of AC voltage-induced out-of-plane head oscillations on contact hysteresis.

Main Results:

  • Demonstrated that AC voltage-induced oscillations can completely suppress contact hysteresis.
  • Observed this effect despite the attractive nature of electrostatic forces.

Conclusions:

  • Out-of-plane oscillations driven by AC voltage offer a novel method to mitigate stiction and contact hysteresis.
  • This finding has implications for high-speed interfaces, such as those in hard disk drives.