Bromocholine bromide is a molecular ferroelectric with moderate phase transition temperature

We showed that the simple organic salt bromocholine bromide is a molecular ferroelectric with a moderate ferroelectric phase transition temperature (329 K). The order–disorder dynamic transition of organic cations results in symmetry breaking from the centrosymmetric paraelectric phase ( P 2 1 / m )...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 6; no. 9; pp. 2221 - 2224
Main Authors Wang, Sha-Sha, Chen, Xiao-Xian, Huang, Bo, Su, Yu-Jun, Zhang, Wei-Xiong, Zeng, Ming-Hua, Chen, Xiao-Ming
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 2018
Subjects
Broken symmetry
Ferroelectric materials
Ferroelectricity
Phase transitions
Transition temperature
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Summary:We showed that the simple organic salt bromocholine bromide is a molecular ferroelectric with a moderate ferroelectric phase transition temperature (329 K). The order–disorder dynamic transition of organic cations results in symmetry breaking from the centrosymmetric paraelectric phase ( P 2 1 / m ) to polar ferroelectric phase ( P 2 1 ), affording a moderate spontaneous polarization of 1.0 μC cm −2 for the ferroelectric phase, as well as a switchable SHG signal and pyroelectric property with feasible “on/off” contrasts.
ISSN:2050-7526
2050-7534
DOI:10.1039/C8TC00419F