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氢键有机反铁电体中具有低能量损耗的强极化切换。

Strong polarization switching with low-energy loss in hydrogen-bonded organic antiferroelectrics.

作者信息

Horiuchi S, Kumai R, Ishibashi S

机构信息

Flexible Electronics Research Center (FLEC) , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba , Ibaraki 305-8565 , Japan . Email:

Condensed Matter Research Center (CMRC) and Photon Factory , Institute of Materials Structure Science , High Energy Accelerator Research Organization (KEK) , Tsukuba , Ibaraki 305-0801 , Japan.

出版信息

Chem Sci. 2017 Nov 1;9(2):425-432. doi: 10.1039/c7sc03859c. eCollection 2018 Jan 14.

DOI:10.1039/c7sc03859c
PMID:29629113
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5872138/
Abstract

The electric-field-induced phase transition from antipolar to polar structures is at the heart of antiferroelectricity. We demonstrate direct evidence of antiferroelectricity by applying a strong electric field to two antipolar crystals of squaric acid (SQA) and 5,5'-dimethyl-2,2'-bipyridinium chloranilate. The field-induced polarization of SQA is quite large and reasonably explained by the theoretically calculated polarization on the hydrogen-bonded sheet sublattice. The pseudo-tetragonal lattice of SQA permits unique switching topologies that produce two different ferroelectric phases of low and high polarizations. By tilting the applied field direction, the electrical switching mechanism can be attributed to a 90° rotation of the sheet polarization. From the viewpoint of applications, the strong polarization, high switching field, and quite slim hysteresis observed in the polarization electric field curve for SQA are advantageous for excellent-efficiency energy storage devices.

摘要

电场诱导的从反极性结构到极性结构的相变是反铁电现象的核心。我们通过对两种方形酸（SQA）和5,5'-二甲基-2,2'-联吡啶氯冉酸盐的反极性晶体施加强电场，展示了反铁电现象的直接证据。SQA的场致极化相当大，并且可以通过氢键合片层亚晶格上的理论计算极化得到合理的解释。SQA的伪四方晶格允许独特的开关拓扑结构，从而产生两种不同极化程度的铁电相。通过倾斜外加电场方向，电开关机制可归因于片层极化的90°旋转。从应用的角度来看，在SQA的极化-电场曲线中观察到的强极化、高开关场和非常窄的滞后现象有利于高效储能器件。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/68a16777f1a5/c7sc03859c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/f43696d23aa6/c7sc03859c-c1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/375bc0d97ecd/c7sc03859c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/68a16777f1a5/c7sc03859c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/f43696d23aa6/c7sc03859c-c1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/2e3b3e967c65/c7sc03859c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/c25f2aef4346/c7sc03859c-f2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/57394c0d6615/c7sc03859c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/e617506d3188/c7sc03859c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/375bc0d97ecd/c7sc03859c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/810c/5872138/68a16777f1a5/c7sc03859c-f7.jpg

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