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True ferroelectric switching in thin films of trialkylbenzene-1,3,5-tricarboxamide (BTA)
Eindhoven University of Technology, Netherlands.
Katholieke University of Leuven, Belgium.
Linköping University, Department of Physics, Chemistry and Biology, Complex Materials and Devices. Linköping University, Faculty of Science & Engineering.
Eindhoven University of Technology, Netherlands.
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2016 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 18, no 34, 23663-23672 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2016. Vol. 18, no 34, 23663-23672 p.
National Category
Physical Chemistry
URN: urn:nbn:se:liu:diva-131661DOI: 10.1039/c6cp03835bISI: 000382107200026PubMedID: 27510767OAI: diva2:1014951

Funding Agencies|NWO Nano program; Vetenskapsradet

Available from: 2016-10-03 Created: 2016-09-30 Last updated: 2016-10-03

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Urbanaviciute, IndreKemerink, Martijn
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