Issue 1, 2014

Room-temperature ABX3-typed molecular ferroelectric: [C5H9–NH3][CdCl3]

Abstract

Reaction of CdCl2 with cyclopentylamine in the presence of aqueous HCl affords an ABX3-typed perovskite structure compound [C5H9–NH3][CdCl3] (1). Above 300 K, it is in a paraelectric phase with a centrosymmetric space group Cmcm, while below 300 K it has a noncentrosymmetric space group Cc, corresponding to a ferroelectric phase. The temperature-dependent dielectric constant shows a peak at about 300 K with a 12-fold enhancement which is confirmed by differential scanning calorimetry. The normalized pyroelectric and second-harmonic generation effect as functions of temperature are almost overlapped, probably indicating that the trends with temperature basically satisfy the Landau phenomenological theory, revealing a symmetry-breaking occurrence. The ferroelectricity, a spontaneous saturation polarization approximately reaching 1.7 μC cm−2, is further confirmed by piezoresponse force microscopy.

Graphical abstract: Room-temperature ABX3-typed molecular ferroelectric: [C5H9–NH3][CdCl3]

Supplementary files

Article information

Article type
Paper
Submitted
30 сеп 2013
Accepted
14 ное 2013
First published
06 яну 2014

Inorg. Chem. Front., 2014,1, 118-123

Room-temperature ABX3-typed molecular ferroelectric: [C5H9–NH3][CdCl3]

Y. Zhang, H. Ye, W. Zhang and R. Xiong, Inorg. Chem. Front., 2014, 1, 118 DOI: 10.1039/C3QI00058C

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