A Hybrid Double Perovskite Ferroelastic Exhibiting the Highest Number of Orientation States

Integrating NH as a B'-site ion within a three-dimensional double hybrid perovskite resulted in a novel high-temperature ferroelastic, (MeNOH)(NH)[Co(CN)], which uniquely demonstrates a reversible triclinic-to-cubic phase transition at 369 K and offers a record-setting 24 orientation states, the highest ever reported among all ferroelastics.