Sensitivity of micromechanical actuation on amorphous to crystalline phase transformations under the influence of Casimir forces

Mehdi Sedighi Ghozotkhar, W. H. Broer, G. Palasantzas*, B. J. Kooi

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

31 Citations (Scopus)
294 Downloads (Pure)

Abstract

Amorphous to crystalline phase transitions in phase change materials (PCM) can have strong influence on the actuation of microelectromechanical systems under the influence of Casimir forces. Indeed, the bifurcation curves of the stationary equilibrium points and the corresponding phase portraits of the actuation dynamics between gold and AIST (Ag5In5Sb60Te30) PCM, where an increase of the Casimir force of up similar to 25% has been measured upon crystallization, show strong sensitivity to changes of the Casimir force as the stiffness of the actuating component decreases and/or the effective interaction area of the Casimir force increases, which can also lead to stiction. However, introduction of intrinsic energy dissipation (associated with a finite quality factor of the actuating system) can prevent stiction by driving the system to attenuated motion towards stable equilibrium depending on the PCM state and the system quality factor.

Original languageEnglish
Article number165423
Pages (from-to)165423-1-165423-5
Number of pages5
JournalPhysical Review. B: Condensed Matter and Materials Physics
Volume88
Issue number16
DOIs
Publication statusPublished - 24-Oct-2013

Keywords

  • PULL-IN PARAMETERS
  • MICROELECTROMECHANICAL SYSTEMS
  • ELECTROSTATIC ACTUATORS
  • MICROSCOPY
  • PHYSICS
  • RANGE
  • MODEL
  • MEMS

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