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Synthesis and Characterization of a Displacement-Type Ferroelectric-Ferroelectric Phase Transition Compound
Yan Luo1, Yin-Qiang Zhang1, Guan-Cheng Xu1
1State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources; College of Chemistry, Xinjiang University, Urumqi, 830046 Xinjiang, PR China.
Abstract:
Ferroelectric materials have aroused the researchers' great interest due to their wide applications. Here, a displacement-type ferroelectric-ferroelectric phase transition material [(NH3)(CH2)3(NH3)]2[InBr6]Br·H2O (1) with Tc = 143 K was successfully prepared. The ferroelectric phase transition is verified by the characterization techniques such as differential scanning calorimetry, single-crystal structure elucidation, dielectric and ferroelectric measurements. The single-crystal structure elucidation reveals that the displacement and distortion of [(NH3)(CH2)3(NH3)]2+ cations lead to the phase transition from Cmc21 to Pca21. The spontaneous polarizations at 293 and 133 K are 0.15 and 0.12 μC·cm-2, respectively. We expect that this work will help in further exploration of some new ferroelectric materials.
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