Electric field driven phase transition and possible twining quasi-tetragonal phase in compressively strained BiFeO3 thin films
Electric field driven phase transition and possible twining quasi-tetragonal phase in compressively strained BiFeO3 thin films
Cheng-Liang Lu(陆成亮)1(), Jun-Ming Liu(刘俊明)2,3(), Tao Wu(吴韬)4
1. School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China; 3. International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China; 4. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
Highly compressively strained BiFeO3 thin films with different thickness are epitaxially grown on (001) LaAlO3 substrates and characterized using various techniques. The quasi-tetragonal phase with a giant axial ratio of ～1.25 and its thickness-dependent evolution are investigated. An interesting twining structure of the quasi-tetragonal phase is evidenced in thicker films through detailed reciprocal space mapping, which becomes more pronounced with increasing film thickness. Moreover, an interesting electric-field driven phase transition was evidenced in the film with a thickness of 38 nm, in which the quasi-tetragonal and rhombohedral phases are close to each other in energy landscape.
. Electric field driven phase transition and possible twining quasi-tetragonal phase in compressively strained BiFeO3 thin films[J]. Frontiers of Physics, 2012, 7(4): 424-428.
Cheng-Liang Lu(陆成亮), Jun-Ming Liu(刘俊明), Tao Wu(吴韬). Electric field driven phase transition and possible twining quasi-tetragonal phase in compressively strained BiFeO3 thin films. Front. Phys. , 2012, 7(4): 424-428.
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