標題: Complex strain evolution of polar and magnetic order in multiferroic BiFeO3 thin films
作者: Chen, Zuhuang
Chen, Zhanghui
Kuo, Chang-Yang
Tang, Yunlong
Dedon, Liv R.
Li, Qian
Zhang, Lei
Klewe, Christoph
Huang, Yen-Lin
Prasad, Bhagwati
Farhan, Alan
Yang, Mengmeng
Clarkson, James D.
Das, Sujit
Manipatruni, Sasikanth
Tanaka, A.
Shafer, Padraic
Arenholz, Elke
Scholl, Andreas
Chu, Ying-Hao
Qiu, Z. Q.
Hu, Zhiwei
Tjeng, Liu-Hao
Ramesh, Ramamoorthy
Wang, Lin-Wang
Martin, Lane W.
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 21-Sep-2018
摘要: Electric-field control of magnetism requires deterministic control of the magnetic order and understanding of the magnetoelectric coupling in multiferroics like BiFeO3 and EuTiO3. Despite this critical need, there are few studies on the strain evolution of magnetic order in BiFeO3 films. Here, in (110)-oriented BiFeO3 films, we reveal that while the polarization structure remains relatively unaffected, strain can continuously tune the orientation of the antiferromagnetic-spin axis across a wide angular space, resulting in an unexpected deviation of the classical perpendicular relationship between the antiferromagnetic axis and the polarization. Calculations suggest that this evolution arises from a competition between the Dzyaloshinskii-Moriya interaction and single-ion anisotropy wherein the former dominates at small strains and the two are comparable at large strains. Finally, strong coupling between the BiFeO3 and the ferromagnet Co0.9Fe0.1 exists such that the magnetic anisotropy of the ferromagnet can be effectively controlled by engineering the orientation of the antiferromagnetic-spin axis.
URI: http://dx.doi.org/10.1038/s41467-018-06190-5
http://hdl.handle.net/11536/148194
ISSN: 2041-1723
DOI: 10.1038/s41467-018-06190-5
期刊: NATURE COMMUNICATIONS
Volume: 9
Appears in Collections:Articles