Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline

Dmitry Isakov; Semen Vasilev; Etelvina De Matos Gomes; Bernardo Almeida; Vladimir Ya Shur; Andrei L. Kholkin

doi:10.1063/1.4965710

Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline

Dmitry Isakov, Semen Vasilev, Etelvina De Matos Gomes, Bernardo Almeida, Vladimir Ya Shur, Andrei L. Kholkin

Research output: Contribution to journal › Article › peer-review

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 π-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 μC/cm² at room temperature, comparable to the best known organic ferroelectrics.

Original language	English
Article number	162903
Journal	Applied Physics Letters
Volume	109
Issue number	16
DOIs	https://doi.org/10.1063/1.4965710
Publication status	Published - 17 Oct 2016
Externally published	Yes

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title = "Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline",

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 π-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 μC/cm2 at room temperature, comparable to the best known organic ferroelectrics.",

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AU - Isakov, Dmitry

AU - Vasilev, Semen

AU - Gomes, Etelvina De Matos

AU - Almeida, Bernardo

AU - Shur, Vladimir Ya

AU - Kholkin, Andrei L.

PY - 2016/10/17

Y1 - 2016/10/17

N2 - Potential ferroelectricity in charge-transfer organic materials is often masked by the intrinsic conductivity. Here, we report the compelling evidence of ferroelectricity in organic π-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 μC/cm2 at room temperature, comparable to the best known organic ferroelectrics.

AB - Potential ferroelectricity in charge-transfer organic materials is often masked by the intrinsic conductivity. Here, we report the compelling evidence of ferroelectricity in organic π-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 μC/cm2 at room temperature, comparable to the best known organic ferroelectrics.

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Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline

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