Domain structure of multiferroic oxide thin films with rhombohedral perovskite structure
Domain is the intrinsic characteristic of all of the ferroic material. The structure of domain and domain wall has significant effects on their physical properties. We’ve investigated the 109o domain wall structure of complicated rhombohedral perovskite BFO thin films at atomic scales by using high resolution electron microscopy and quantitative electron micrscopy. The displacement of cations and local polarization distributions across the domain walls were determined. It reveals that the observed room temperature conductivity at domain walls in the insulating multiferroic BiFeO3, correlates with the structural driven changes, resulting in a decrease in the bandgap at the domain wall. The results would provide quantitative structural information for understanding the the polarization reversing and magnetoelectric coupling in multiferroics, and for the research and development of related devices in electronics industry.
multiferroic domain domain wall microstructure exit wave reconstruction
Zhan Q Yu R Chu Y H Zheng H M Crane S P Ramesh R
School of Materials Science & Engineering, University of Science & Technology Beijing, Beijing, 1000 Beijing National Center for Electron Microscopy, Department of Materials Science & Engineering, Tsin Department of Materials Science and Engineering, University of California, Berkeley, Colifornia 9472
国内会议
长沙
英文
1-1
2010-06-19（万方平台首次上网日期，不代表论文的发表时间）