Reversible structural phase transition, dielectric switches and photoluminescence based on hexathiocyanate Thulium(III) anions

High-Tc Quadratic Nonlinear Optical and Dielectric Switchings in Fe-Based Plastic Crystalline Ferroelectric

“…Dielectric switches repeated so many times suggest that 1 may be a candidate for switchable dielectric materials. 30,38,39 We measured the single crystal structure of compound 1 at 300 K (LTP) to understand the mechanism of plastic ferroelectric phase transition. Compound 1 crystallized in the orthorhombic ferroelectric space group Cmc2 In addition, we also tried to obtain the HTP structure of compound 1 at 400 K (higher than Tc).…”

“…As shown in Figure b, the dielectric signal shows a clear switch between high and low dielectric states. Dielectric switches repeated so many times suggest that 1 may be a candidate for switchable dielectric materials. ,, …”

Unusual symmetry breaking in high-temperature enantiomeric ferroelectrics with large spontaneous polarization

“…In addition, the broad reversible peaks in the DSC curve indicate that the enantiomer undergoes a typical first-order phase transition. 31 In addition, we examined the DSC curve changes of compounds 1 and 2 in the temperature range of 160-250 K (Fig. S7 †).…”

Dielectric switching from a high temperature plastic phase transition in two organic salts with chiral features

“…[1][2][3][4] Among the available materials, temperature-triggered responsive dielectric switchable materials that can undergo transitions between high and low dielectric states at a phase transition temperature in response to a temperature stimulus are promising materials for use in data communication, signal processing, tunable dielectric devices, etc. [5][6][7][8] The construction of hybrid metal halides is usually an effective strategy for the synthesis of plastic phase transition materials, because they provide great opportunities for obtaining temperature-triggered reversible solidsolid phase transitions. [9][10][11] So far, a large number of organicinorganic hybrid metals have been found to support dielectric switching halides, but most of this family are based on organic ammonium with alkyl side chains, having very low phase transition temperatures and not plastic phase transitions, which restricts their application.…”