Room-temperature ferroelectric and ferroelastic orders coexisting in a new tetrafluoroborate-based perovskite

Abstract

Coexistence of multiferroic orders attached increasing attentions on its potential applications in multiple-state memory, switch, and computing, but it is still challenging to design the single-phase crystalline materials hosting multiferroic...

An unprecedented azobenzene-based organic single-component ferroelectric

“…As a second-order nonlinear optical effect, the SHG effect could be used to detect non-centrosymmetric crystals, because SHG response is only allowed in crystals that are devoid of inversion symmetry. 32,33 APFA shows a clear SHG signal at room temperature with intensity being about 1/4 of that of the KDP standard, in accordance with the non-centrosymmetric polar P 2 1 space group (the inset of Fig. 2c ).…”

A ferroelastic molecular rotator [(Me2N(CH2)2NH3)(18-crown-6)]triflate with dual dielectric switches

“…These reasons undoubtedly promote the exploration of ferroelastics from inorganic materials to organic molecules. [18][19][20][21][22][23][24] In particular, as a representative of organic molecules, the crown ether-based molecular rotators show a special structure: the crown ether as a stator to fix the rotator cation through hydrogen bonds, and the counterion. [25][26][27][28][29][30] This structure is considered as a promising template for the construction ferroelastic phase transition and switchable materials, because it facilitates the dynamic motions of building blocks.…”

High temperature hybrid perovskite multifunctional switching materials constructed through precise molecular design

“…[12][13][14][15] Nonetheless, nowadays, the reported OIHP molecular switching materials show low phase transition temperatures (T p ) and only single-switching (dielectric switching) or double-switching (dielectric switching and ferroelastic switching or dielectric switching and nonlinear switching) characteristics. [16][17][18][19] In particular, high T p OIHP materials with three kinds of switching characteristics are highly desirable and there are great challenges in the design of these multifunctional materials because the dynamic motion of internal components in a crystal lattice is hard to control. It is noteworthy that these multifunctional materials with a wide temperature range and multi-switching characteristics increase the possibility of practical applications.…”