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https://hdl.handle.net/1822/43578
Título: | Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline |
Autor(es): | Isakov, Dmitry Vasilev, Semen Gomes, E. Matos Almeida, B. G. Shur, Vladimir Ya. Kholkin, Andrei L. |
Palavras-chave: | Meta-nitroaniline Electromechanical properties Pyroelectric properties Ferroelectric behaviour |
Data: | 2016 |
Editora: | AIP Publishing |
Revista: | Applied Physics Letters |
Citação: | Isakov, D., Vasilev, S., Gomes, E. D. M., Almeida, B., Shur, V. Y., & Kholkin, A. L. (2016). Probing ferroelectric behaviour in charge-transfer organic meta-nitroaniline. [Article]. Applied Physics Letters, 109(16). doi: 10.1063/1.4965710 |
Resumo(s): | Potential ferroelectricity in charge-transfer organic materials is often masked by the intrinsic conductivity. Here, we report the compelling evidence of ferroelectricity in organic p-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 lossydielectric 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 microC/cm2 at room temperature, comparable to the best known organic ferroelectrics. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/43578 |
DOI: | 10.1063/1.4965710 |
ISSN: | 0003-6951 1077-3118 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FCD - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
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Probing ferroelectric behaviour.pdf Acesso restrito! | 530,9 kB | Adobe PDF | Ver/Abrir |