Phase transition enhanced superior elasticity in freestanding single-crystalline multiferroic BiFeO(3) membranes.
Phase transition enhanced superior elasticity in freestanding single-crystalline multiferroic BiFeO(3) membranes.
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相变增强了独立式单晶多铁性 BiFeO3 膜的卓越弹性
DOI：
10.1126/sciadv.aba5847
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发表时间：
2020
期刊：
影响因子：
13.6
通讯作者：
Liu Ming
中科院分区：
文献类型：
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作者：
Peng Bin;Peng Ren-Ci;Zhang Yong-Qiang;Dong Guohua;Zhou Ziyao;Zhou Yuqing;Li Tao;Liu Zhijie;Luo Zhenlin;Wang Shaohao;Xia Yan;Qiu Ruibin;Cheng Xiaoxing;Xue Fei;Hu Zhongqiang;Ren Wei;Ye Zuo-Guang;Chen Long-Qing;Shan Zhiwei;Min Tai;Liu Ming
将铁氧化物薄膜集成到先进的柔性电子产品中将带来超越有机和金属材料的多功能性。然而，在单晶铁氧化物中实现对于有机或金属材料相当大的高柔性是具有挑战性的。在这里，我们展示了上级的独立单晶BiFeO 3膜，这是典型的多铁性材料与多功能性的灵活性。该复合材料能承受180°的循环折叠，并具有良好的回复性，原位弯曲时的最大弯曲应变可达5.42%，远高于体相材料。相场模拟表明，这种上级弹性主要来源于可逆的菱面体-四面体相变。这项研究提出了一个一般的基本机制，为各种铁氧化物，以实现高的灵活性，并作为智能材料在柔性电子产品。
The integration of ferroic oxide thin films into advanced flexible electronics will bring multifunctionality beyond organic and metallic materials. However, it is challenging to achieve high flexibility in single-crystalline ferroic oxides that is considerable to organic or metallic materials. Here, we demonstrate the superior flexibility of freestanding single-crystalline BiFeO3membranes, 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.