Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/19512
Title: | Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline |
Author: | Isakov, Dmitry Vasilev, Semen Gomes, Etelvina de Matos Almeida, Bernardo Shur, Vladimir Ya Kholkin, Andrei L. |
Keywords: | PIEZORESPONSE FORCE MICROSCOPY MOLECULAR-CRYSTALS THIN-FILMS GLYCINE MORPHOLOGY MNA |
Issue Date: | 2016 |
Publisher: | AMER INST PHYSICS |
Abstract: | Potential ferroelectricity in charge-transfer organic materials is often masked by the intrinsic conductivity. Here, we report the compelling evidence of ferroelectricity in organic pi-conjugated meta-nitroaniline (m-NA) crystals as shown by the local electromechanical measurements using the piezoresponse force microscopy (PFM) technique. m-NA is a charge-transfer molecular material with the exceptional optical non-linearity and perceptible conductivity along the crystallographic polar axis. While standard Sawyer-Tower measurements revealed an apparently lossy-dielectric hysteresis, The PFM switching spectroscopy indicated clear ferroelectric behaviour in this technologically important multifunctional material. Further study of the pyroelectric properties in m-NA crystals confirmed their high spontaneous polarization of 18 mu C/cm(2) at room temperature, comparable to the best known organic ferroelectrics. Published by AIP Publishing. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/19512 |
DOI: | 10.1063/1.4965710 |
ISSN: | 0003-6951 |
Publisher Version: | 10.1063/1.4965710 |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline_10.10631.4965710.pdf | 756.88 kB | Adobe PDF | View/Open |
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