Electric field driven phase transition and possible twining quasi-tetragonal phase in compressively strained BiFeO3 thin films

Highly compressively strained BiFeO3 thin films with different thickness are epitaxially grown on （001） LaA103 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 inter- esting...

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Bibliographic Details
Published inFrontiers of physics Vol. 7; no. 4; pp. 424 - 428
Main Author 陆成亮 刘俊明 吴韬
Format Journal Article
LanguageEnglish
Published Beijing Higher Education Press 01.08.2012
Springer Nature B.V
Subjects
Astronomy
Astrophysics and Cosmology
Atomic
BiFeO3薄膜
Condensed Matter Physics
Electric fields
Epitaxial growth
Film thickness
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Phase transitions
Physics
Physics and Astronomy
Research Article
Substrates
Thin films
压缩应变
四方相
外延生长
电场驱动
相变
空间映射
缠绕结构
antiferromagnetic
phase transition
ferroelectricity
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ISSN2095-0462
2095-0470
DOI10.1007/s11467-011-0241-9

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Summary:Highly compressively strained BiFeO3 thin films with different thickness are epitaxially grown on （001） LaA103 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 inter- esting 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. More- over, 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.
Bibliography:ferroelectricity, antiferromagnetic, phase transition
Highly compressively strained BiFeO3 thin films with different thickness are epitaxially grown on （001） LaA103 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 inter- esting 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. More- over, 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.
11-5994/O4
Cheng-Liang Lu, Jun-Ming Liu , Tao Wu（1 School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China 2Laboratory of Solid State Microstrueture, Nanjing University, Nanjing 210093, China 3International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China 4Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371, Singapore）
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ISSN:2095-0462
2095-0470
DOI:10.1007/s11467-011-0241-9