Hysteresis, loss and nonlinearity in epitaxial PbZr0.55Ti0.45O3 films: A polarization rotation model

Philip Lucke, Muharrem Bayraktar*, Yorick Alexander Birkhölzer, Mohammadreza Nematollahi, Andrey Yakshin, A.J.H.M. Rijnders, F. Bijkerk, E.P. Houwman

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

The phenomena of hysteresis, ferroelectric loss, and nonlinearity are investigated for the strain and polarization of a monoclinic, epitaxial Pb(Zr,Ti)O3 film over the 70 Hz to 5 kHz frequency range at sub-coercive excitation fields and zero electrical bias. For the strain, a linear hysteretic behavior is found, whereas the polarization shows a strongly nonlinear hysteretic behavior. In contrast to polycrystalline structures (for instance in ceramics or chemical solution deposited thin films), the commonly referred Rayleigh model cannot explain the observed behavior. A new model is presented, based on the rotation of the polarization vector within the monoclinic or rhombohedral unit cell under an applied electric field, with the viscous interaction of domains accompanying the unit cell deformation. The model explains the amplitude and frequency scaling of the strain, polarization, and loss tangent as well as the observed higher harmonics of polarization in the measured epitaxial Pb(Zr,Ti)O3 films. It is concluded that the nonlinear response and the hysteretic loss originate from two separate physical processes. The nonlinear response is attributed to the nonlinear angular rotation of the polarization vector, whereas the hysteresis and ferroelectric loss are due to a viscous interaction of domains while the polarization vector is rotating.
Original languageEnglish
Article number2005397
Number of pages12
JournalAdvanced functional materials
Volume30
Issue number52
Early online date23 Sep 2020
DOIs
Publication statusPublished - 22 Dec 2020

Keywords

  • UT-Hybrid-D
  • hysteresis
  • nonlinearity
  • piezoelectric
  • ferroelectrics

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