Linear and quadratic electromechanical effects of a room temperature ferroelectric nematic liquid crystal

POSTER

Abstract

The lack of centrosymmetry of the ferroelectric nematic (NF) liquid crystal phase enables both linear (piezoelectric) and quadratic (electrostriction) electromechanical couplings. Here we report measurements of AC electric field induced mechanical vibration of a room temperature ferroelectric nematic liquid crystal mixture using a lock in amplifier and accelerometer. Mechanical vibrations were detected both at the base frequency (linear piezoelectric signals) and at double frequencies (electrostriction). The signals are correlated with the alignment properties of the director and a theoretical model is proposed to explain the observations.

*Grant support: This work was supported by NSF DMR 2210083.

Presenters

  • Md Sakhawat Hossain

    • Advanced Materials and Liquid Crystal Institute,Kent State U
    • Materials Science Graduate Program, Advanced Materials and Liquid Crystal Institute, Kent State University, Kent OH, 44242, USA

Authors

  • Md Sakhawat Hossain

    • Advanced Materials and Liquid Crystal Institute,Kent State U
    • Materials Science Graduate Program, Advanced Materials and Liquid Crystal Institute, Kent State University, Kent OH, 44242, USA

  • Alex Adaka

    • Materials Science Graduate Program, Kent State University,
    • Materials Science Graduate Program, Advanced Materials and Liquid Crystal Institute, Kent State University, Kent OH

  • Chenrun Feng

    • Materials Science Graduate Program, Advanced Materials and Liquid Crystal Institute, Kent State University, Kent OH, 44242, USA

  • James T. Gleeson

    • Department of Physics, Kent State University, Kent OH, 44242, USA

  • Samuel Sprunt

    • Kent State University
    • Department of Physics, Kent State University, Kent OH, 44242, USA

  • Peter Salamon

    • Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box 49, Budapest H-1525, Hungary

  • Antal Jakli

    • Kent State University
    • Materials Science Graduate Program, Kent State University, Kent OH, 44242, USA Department of Physics, Kent State University, Kent OH, 44242, USA
    • Materials Science Graduate Program, Advanced Materials and Liquid Crystal Institute, Kent State University, Kent OH, 44242, USA, Department of Physics, Kent State University
    • Department of Physics, Advanced Materials and Liquid Crystal Institute, Kent State University
    • Kent State Univerity