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Issue 34, 2016
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True ferroelectric switching in thin films of trialkylbenzene-1,3,5-tricarboxamide (BTA)

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Abstract

We have investigated the ferroelectric polarization switching properties of trialkylbenzene-1,3,5-tricarboxamide (BTA), which is a model system for a large class of novel organic ferroelectric materials. In the solid state BTAs form a liquid crystalline columnar hexagonal phase that provides long range order that was previously shown to give rise to hysteretic dipolar switching. In this work the nature of the polar switching process is investigated by a combination of dielectric relaxation spectroscopy, depth-resolved pyroelectric response measurements, and classical frequency- and time-dependent electrical switching. We show that BTAs, when brought in a homeotropically aligned hexagonal liquid crystalline phase, are truly ferroelectric. Analysis of the transient switching behavior suggests that the ferroelectric switching is limited by a highly dispersive nucleation process, giving rise to a wide distribution of switching times.

Graphical abstract: True ferroelectric switching in thin films of trialkylbenzene-1,3,5-tricarboxamide (BTA)

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Publication details

The article was received on 02 Jun 2016, accepted on 03 Aug 2016 and first published on 03 Aug 2016


Article type: Paper
DOI: 10.1039/C6CP03835B
Phys. Chem. Chem. Phys., 2016,18, 23663-23672
  • Open access: Creative Commons BY license
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    True ferroelectric switching in thin films of trialkylbenzene-1,3,5-tricarboxamide (BTA)

    A. V. Gorbunov, T. Putzeys, I. Urbanavičiūtė, R. A. J. Janssen, M. Wübbenhorst, R. P. Sijbesma and M. Kemerink, Phys. Chem. Chem. Phys., 2016, 18, 23663
    DOI: 10.1039/C6CP03835B

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