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A Molecular Ferroelectric Showing Room‐Temperature Record‐Fast Switching of Spontaneous Polarization
Author(s) -
Sun Zhihua,
Yi Xianfeng,
Tao Kewen,
Ji Chengmin,
Liu Xitao,
Li Lina,
Han Shiguo,
Zheng Anmin,
Hong Maochun,
Luo Junhua
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201805776
Subject(s) - ferroelectricity , polarization (electrochemistry) , switching time , materials science , electric field , optoelectronics , fast switching , induced polarization , molecular switch , voltage , chemistry , dielectric , molecule , electrical engineering , physics , electrical resistivity and conductivity , engineering , organic chemistry , quantum mechanics
Fast switching of spontaneous polarization ( P s ) 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 P s in a new molecular ferroelectric, N ‐methylmorpholinium trinitrophenolate ( 1 ), which displays notable ferroelectricity ( P s =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. 2×10 5 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.