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Article Dans Une Revue Journal of Materials Research Année : 2012

New ferroelectric: Bis-thiourea pyridinium bromide inclusion compound

Jan Wąsicki
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Eric Collet
Loïc Toupet

Résumé

Dielectric measurements (permittivity and hysteresis loop) of monocrystals of bis-thiourea pyridinium bromide inclusion compound have revealed for the first time ferroelectric properties of the studied samples. In the present article, a model of ferroelectric ordering on the basis of single-crystal x-ray diffraction data is described. In the low-temperature phase, the spontaneous polarization is directed along the a axis and ferroelectricity is of the mixed type (displacement and order-disorder component), whereas in the intermediate phase the spontaneous polarization is directed along the c axis and ferroelectricity is of the order-disorder type.
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hal-00856655 , version 1 (02-09-2013)

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Piotr Czarnecki, Aleksandra Pajzderska, Jan Wąsicki, Eric Collet, Loïc Toupet. New ferroelectric: Bis-thiourea pyridinium bromide inclusion compound. Journal of Materials Research, 2012, 27 (22), pp.2844-2850. ⟨10.1557/JMR.2012.301⟩. ⟨hal-00856655⟩
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