A Molecular Ferroelectric Showing Room‐Temperature Record‐Fast Switching of Spontaneous Polarization |
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| Authors: | Prof Zhihua Sun Xianfeng Yi Kewen Tao Chengmin Ji Xitao Liu Dr Lina Li Shiguo Han Prof Anmin Zheng Prof Maochun Hong Prof Junhua Luo |
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| Institution: | 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, China;2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, China |
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| Abstract: | Fast switching of spontaneous polarization (Ps) is one of the most essential requirements for ferroelectrics used in the field of data storage. However, in contrast to inorganic counterparts, the low operating frequency (<500 Hz) for molecular ferroelectrics severely hinders their large‐scale applications. Herein, for the first time, we achieved the room‐temperature fastest switching of the Ps in a new molecular ferroelectric, N‐methylmorpholinium trinitrophenolate ( 1 ), which displays notable ferroelectricity (Ps=3.2 μc cm?2). Strikingly, electric polarizations of 1 have been switched under a record‐high frequency of 263 kHz, and this performance remains stable without any obvious fatigue after ca. 2×105 switching cycles. To our knowledge, 1 is the first organic ferroelectric to switch polarization at such a high operating frequency, exceeding the majority of organic ferroelectrics, which opens up new possibilities for its potential in the field of non‐volatile memory. |
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| Keywords: | ferroelectricity molecular ferroelectrics organic ferroelectrics phase transition polarization switching |
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