Ferroelectric switching kinetics of large area Croconic acid thin films

ORAL

Abstract

In the present work, large area ferroelectric thin films of Croconic acid with thickness ranging from 10-50 nm has been fabricated by physical vapor deposition on ITO substrates at – 30 C. The films on being annealed up to room temperature show excellent wetting forming polycrystalline films. The AFM morphology exhibits stable grains with lateral dimensions of 50-200 nm often exhibiting a monodomain polar states which can be reversibly switched as evidenced by piezoresponse force microscopy. Since the switching mechanism here solely relies on the proton tautomerism localized in the -OH- hydrogen bonds, studying local switching kinetics of the individual polar grains may unveil a novel mechanism of domain nucleation and switching in these molecular ferroelectric systems.

*This work is supported by the grant DE-SC0019173 funded by the U.S. Department of Energy, Office of Science.

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Presenters

  • Shashi Poddar

    • Physics, University of Nebraska Lincoln
    • University of Nebraska - Lincoln

Authors

  • Shashi Poddar

    • Physics, University of Nebraska Lincoln
    • University of Nebraska - Lincoln

  • Xuanyuan Jiang

    • Department of Physics and Astronomy, University of Nebraska-Lincoln
    • University of Nebraska, Department of Physics and Astronomy
    • University of Nebraska - Lincoln
    • Physics, University of Nebraska Lincoln

  • Yifan Yuan

    • Mechanical & Materials Engineering, University of Nebraska Lincoln

  • Xiaoshan Xu

    • Department of Physics and Astronomy, University of Nebraska-Lincoln
    • University of Nebraska - Lincoln
    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • University of Nebraska, Department of Physics and Astronomy
    • Physics, University of Nebraska Lincoln