Large Spontaneous Polarization Ferroelectric Property, Switchable Second-Harmonic Generation Responses, and Magnetism in an Fe-Based Compound
Ting‐Ting Ying, Hui-Juan Shi, Shaopeng Chen, Yun‐Zhi Tang, Yu‐Hui Tan, Sufen Wang, Zhen Sun, Fang Xin Wang, Ming‐Yang Wan
Abstract
Since the switchable spontaneous polarization of ferroelectric materials endows it with many useful properties such as a large pyroelectric coefficient, switchable spontaneous polarization, and semiconductor, it has a wide range of application prospects, and the research of high-performance molecular ferroelectric materials has become a hot spot. We obtained a 0D organic–inorganic hybrid ferroelectric [(CH 3 ) 3 NCH 2 CH 2 CH 3 ] 2 FeCl 4 ( 1 ) with well-defined ferroelectric domains and excellent domain inversion and exhibited a relatively large spontaneous polarization ( P s = 9 μC/m –2 ) and a Curie temperature ( T c ) of 394 K. Furthermore, compound 1 belongs to the non-centrosymmetrical space group Cmc 2 1 and has a strong second-harmonic generation signal. Interestingly, we also performed magnetic tests on 1, which confirmed that it is a magnetic material. This work provides clues for exploring the application of high-performance molecular ferroelectric materials in future multifunctional smart devices.