A layered hybrid rare-earth double perovskite with two continuous reversible phase transitions induced by unusual two driving gears of fan-like rotation movements

Abstract

Organic-inorganic hybrid rare-earth double perovskite has been paid more and more attention owing to their intriguing chemical and physical properties. In this paper, we report a new layered 2D hybrid...

Fast rotating dipole array inducing large dielectric response in a Ruddlesden–Popper hybrid perovskite ferroelastic

“…In other words, compound 1 has a large dielectric switching ratio, ε′ HTP /ε′ LTP > 100, which is extremely rare among 2D organic-inorganic hybrid ferroelastics because most of them exhibit low dielectric responses (ε′ HTP /ε′ LTP < 50) (Table 1). [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] According to the fundamental dielectric theories, the dielectric response depends on the molecular structure, temperature, and the frequency of the electric field when an AC field is applied. In fact, the orientation of molecular dipoles is slower compared to the distortional polarization (relative displacement/deformation of charges under the action of an electric field).…”

Three-Dimensional Bimetallic Ammonium K–Eu Nitrate with a Rare (6,6)-Connected Ion Topology Exhibiting Structural Phase Transition and Photoluminescence Properties

“…Over the past decade, hybrid double perovskite (A 2 M I M III X 6 ) systems incorporating two different metal ions at the M site have drawn much attention because of their tunability of the components and diversity of functionalities, which cannot be achieved by the single hybrid perovskites. Typical systems include the double perovskites built with anionic bridging ligands, e.g., halide, cyanide, formate, and azide. − Intriguing properties, including dielectric transitions, magnetism, and ferroelectricity, emerge with the structural changes have been reported. − …”