Single-domain multiferroic BiFeO3 films
- Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
- National Tsing Hua Univ., Hsinchu (Taiwan)
- National Chiao Tung Univ., Hsinchu (Taiwan)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Xi'an Jiaotong Univ., Shaanxi (China)
- National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
- Synchrotron SOLEIL, Gif-sur-Yvette (France)
- Hiroshima Univ., Higashi-Hiroshima (Japan)
- National Chiao Tung Univ., Hsinchu (Taiwan); Academia Sinica, Taipei (Taiwan)
The strong coupling between antiferromagnetism and ferroelectricity at room temperature found in BiFeO3 generates high expectations for the design and development of technological devices with novel functionalities. However, the multi-domain nature of the material tends to nullify the properties of interest and complicates the thorough understanding of the mechanisms that are responsible for those properties. Here we report the realization of a BiFeO3 material in thin film form with single-domain behaviour in both its magnetism and ferroelectricity: the entire film shows its antiferromagnetic axis aligned along the crystallographic b axis and its ferroelectric polarization along the c axis. With this we are able to reveal that the canted ferromagnetic moment due to the Dzyaloshinskii–Moriya interaction is parallel to the a axis. Moreover, by fabricating a Co/BiFeO3 heterostructure, we demonstrate that the ferromagnetic moment of the Co film does couple directly to the canted moment of BiFeO3.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1329167
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Vol. 7; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Thu Nov 16 19:00:00 EST 2017
· Nature Communications
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OSTI ID:1466373