3D Organic–Inorganic Perovskite Ferroelastic Materials with Two Ferroelastic Phases: [Et3P(CH2)2F][Mn(dca)3] and [Et3P(CH2)2Cl][Mn(dca)3] |
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| Authors: | Meng-Meng Zhao Lin Zhou Ping-Ping Shi Xuan Zheng Xiao-Gang Chen Ji-Xing Gao Lei He Prof?Dr Qiong Ye Prof?Dr Cai-Ming Liu Prof?Dr Da-Wei Fu |
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| Institution: | 1. Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular, Ferroelectrics, Southeast University, Nanjing, 211189 P. R. China;2. Beijing National Laboratory for Molecular Sciences, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China |
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| Abstract: | Organic–inorganic hybrid perovskite-type multiferroics have attracted considerable research interest owing to their fundamental scientific significance and promising technological applications in sensors and multiple-state memories. The recent achievements with divalent metal dicyanamide compounds revealed such malleable frameworks as a unique platform for developing novel functional materials. Herein, two 3D organic–inorganic hybrid perovskites Et3P(CH2)2F]Mn(dca)3] ( 1 ) and Et3P(CH2)2Cl]Mn(dca)3] ( 2 ) (dca=dicyanamide, N(CN)2?) are presented. Accompanying the sequential phase transitions, they display a broad range of intriguing physical properties, including above room temperature ferroelastic behavior, switchable dielectricity, and low-temperature antiferromagnetic ordering (Tc=2.4 K for both 1 and 2 ). It is also worth noting that the spontaneous strain value of 1 is far beyond that of 2 in the first ferroelastic phase, as a result of the precise halogen substitution. From the point view of molecular design, this work should inspire further exploration of multifunctional molecular materials with desirable properties. |
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| Keywords: | ferroelastic domains halogen substitution magnetic ordering perovskite spontaneous strain |
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