Nonlinear piezoelectricity in epitaxial ferroelectrics at high electric fields

Alexei Grigoriev, Rebecca Sichel, Ho Nyung Lee, Eric C. Landahl, Bernhard Adams, Eric M. Dufresne, Paul G. Evans

    Research output: Contribution to journalArticlepeer-review

    59 Scopus citations

    Abstract

    Nonlinear effects in the coupling of polarization with elastic strain have been predicted to occur in ferroelectric materials subjected to high electric fields. Such predictions are tested here for a PbZr0.2Ti0.8O3 ferroelectric thin film at electric fields in the range of several hundred MV/m and strains reaching up to 2.7%. The piezoelectric strain exceeds predictions based on constant piezoelectric coefficients at electric fields from approximately 200 to 400MV/m, which is consistent with a nonlinear effect predicted to occur at corresponding piezoelectric distortions.

    Original languageEnglish
    Article number027604
    JournalPhysical Review Letters
    Volume100
    Issue number2
    DOIs
    StatePublished - Jan 18 2008

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