Chemical design of a new displacive-type ferroelectric
Chemical design of a new displacive-type ferroelectric
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新型位移型铁电体的化学设计
DOI：
10.1039/d1dt03693a
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发表时间：
2022
影响因子：
4
通讯作者：
Moriwake Hiroki
中科院分区：
文献类型：
--
作者：
Itoh Mitsuru;Hamasaki Yosuke;Takashima Hiroshi;Yokoi Rie;Taguchi Ayako;Moriwake Hiroki
自1943年发现钙钛矿型铁电氧化物BaTiO 3以来，已经调查了许多材料作为新铁电体的候选材料。自上个世纪以来，钙钛矿型材料在铁电材料的基础研究和应用中一直占据主导地位。实验学家和理论家为后钙钛矿材料开发了一种新的材料设计流程。在这方面，我们主要集中在共价性在氧化物中的位移型铁电体的铁电性演化中的作用。这一视角审视了以下主题：（1）通过铁电量子临界点从量子顺电性到铁电性的交叉，（2）阳离子-氧共价在铁电性中的作用以及钙钛矿型化合物中向量子顺电性的交叉，（3）钙钛矿中的偏心诱导铁电性，（4）铌酸锂型氧化物中铁电性的二阶Jahn-Teller效应增强，（5）AFeO_3的四个铁电相的存在以及随着A半径的减小而发生的相结构转变（A = La-Al），（6）钙钛矿相关的Bi 2 SiO 5和纤锌矿的四面体铁电体，（7）一种罕见类型的极化转换系统，其中κ-Al 2 O 3系统中的离子配位数在4和6之间变化，（8）硅酸钾型化合物中的孤对电子诱导铁电体。
Since the discovery of the ferroelectric perovskite-type oxide BaTiO3 in 1943, numerous materials have been surveyed as candidates for new ferroelectrics. Perovskite-type materials have played a leading role in basic research and applications of ferroelectric materials since the last century. Experimentalists and theoreticians have developed a new materials design stream for post-perovskite materials. In this stream, we have mainly focused on the role of covalency in the evolution of ferroelectricity for displacive-type ferroelectrics in oxides. This perspective surveys the following topics: (1) crossover from quantum paraelectric to ferroelectric through a ferroelectric quantum critical point, (2) the role of cation–oxygen covalency in ferroelectricity and the crossover to quantum paraelectric in perovskite-type compounds, (3) off-center-induced ferroelectricity in perovskites, (4) second-order Jahn–Teller effect enhancement of ferroelectricity in lithium-niobate-type oxides, (5) the presence of four ferroelectric phases and structural transitions of phases of AFeO3 with decreasing radius of A (A = La–Al), (6) tetrahedral ferroelectrics of perovskite-related Bi2SiO5 and wurtzites, (7) a rare type of polarization switching system in which the coordination number of ions in κ-Al2O3 systems changes between 4 and 6, and (8) lone-pair-electron-induced ferroelectrics in langasite-type compounds.