Phase transition enhanced superior elasticity in freestanding single-crystalline multiferroic BiFeO <sub>3</sub> membranes
Bin Peng, Ren‐Ci Peng, Yongqiang Zhang, Guohua Dong, Ziyao Zhou, Yuqing Zhou, Tao Li, Zhijie Liu, Zhenlin Luo, Shao Hao Wang, Yan Xia, Ruibin Qiu, Xiaoxing Cheng, Fei Xue, Zhongqiang Hu, Wei Ren, Zuo‐Guang Ye, Long‐Qing Chen, Zhiwei Shan, Tai Min, Ming Liu
Abstract
membranes, which are typical multiferroic materials with multifunctionality. They can endure cyclic 180° folding and have good recoverability, with the maximum bending strain up to 5.42% during in situ bending under scanning electron microscopy, far beyond their bulk counterparts. Such superior elasticity mainly originates from reversible rhombohedral-tetragonal phase transition, as revealed by phase-field simulations. This study suggests a general fundamental mechanism for a variety of ferroic oxides to achieve high flexibility and to work as smart materials in flexible electronics.