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Higher order ferroic switching induced by scanning force microscopy.

M Abplanalp1, J Fousek, P Günter

  • 1Institute of Quantum Electronics, Swiss Federal Institute of Technology, CH-8093 Zürich, Switzerland.

Physical Review Letters
|June 21, 2001
PubMed
Summary

We observed ferroelastoelectric switching in barium titanate thin films. High compressive stress reversed polarization antiparallel to the electric field, demonstrating a new switching mechanism.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Ferroelectricity

Background:

  • Ferroelectric materials exhibit spontaneous electric polarization.
  • Switching ferroelectric polarization typically aligns with an applied electric field.
  • The interplay between mechanical stress and electric polarization is crucial for novel material functionalities.

Purpose of the Study:

  • To investigate ferroelastoelectric switching in ferroelectric materials.
  • To explore the effect of simultaneous electric field and compressive stress on ferroelectric domain behavior.
  • To demonstrate a novel polarization switching mechanism beyond classical ferroelectric domain reversal.

Main Methods:

  • Utilized barium titanate thin films.
  • Employed a scanning force microscope tip to apply localized electric fields and compressive stresses.

Related Experiment Videos

  • Performed measurements to analyze ferroelectric domain reversal under varying stress conditions.

    • Main Results:

    • Observed classical ferroelectric domain reversal at low compressive stresses, with polarization aligning parallel to the electric field.
    • Demonstrated ferroelastoelectric switching at high compressive stresses, where polarization reversed antiparallel to the applied electric field.
    • Confirmed the influence of mechanical stress on the direction of ferroelectric polarization switching.

    Conclusions:

    • Ferroelastoelectric switching is achievable in ferroelectric materials like barium titanate.
    • Mechanical stress can fundamentally alter the direction of polarization switching in ferroelectrics.
    • This finding opens new avenues for designing materials with tunable electromechanical properties.