Beryllium-Based ABX3-Type Organic-Inorganic Hybrid Halide Ferroelastic
Jia-Ying Yu1, Zhe-Kun Xu1, Jia-Qi Gan1
1Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People's Republic of China.
Abstract:
Organic-inorganic hybrid ferroelastic materials attract great interest in multiple application scenarios, including data storage, shape memory, actuators, mechanical switches, etc. Despite hybrid molecular ferroelastics being the subject of extensive studies due to their remarkable structural and compositional versatility, hybrid metal halide ferroelastics composed of group IIA metal elements have rarely been reported up to now. Herein, a beryllium (Be)-based hybrid halide ABX3-type ferroelastic, CBA-BeF3 (CBA = cyclobutylamine), has been reported for the first time. CBA-BeF3 demonstrates an order-disorder structural phase transition at 356 K, accompanied by a distinct change in symmetry that belongs to the paraelastic-ferroelastic transition with an Aizu notation of mmmF2/m. The observation of ferroelastic domain evolution and stress-strain hysteresis phenomena indicates the ferroelastic nature of CBA-BeF3. This work showcases a brand-new family of hybrid halide ferroelastics and is of great inspiration to explore more group IIA metal-based ferroelastic materials.
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