Designing Morphotropic Phase Composition in BiFeO3
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Martin Luther Univ. of Halle-Wittenberg, Halle (Germany)
- National Inst. for Research and Development in Electrochemistry and Condensed Matter, Timisoara (Romania)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Drexel Univ., Philadelphia, PA (United States)
- Martin Luther Univ. of Halle-Wittenberg, Halle (Germany)
- Iowa State Univ., Ames, IA (United States)
- Harvard Univ., Cambridge, MA (United States)
In classical morphotropic piezoelectric materials, rhombohedral and tetragonal phase variants can energetically compete to form a mixed phase regime with improved functional properties. Even though the discovery of morphotropic-like phases in multiferroic BiFeO3 films has broadened this definition, accessing these phase spaces is still typically accomplished through isovalent substitution or heteroepitaxial strain which do not allow for continuous modification of phase composition postsynthesis. In this work, we show that it is possible to use low-energy helium implantation to tailor morphotropic phases of epitaxial BiFeO3 films postsynthesis in a continuous and iterative manner. Applying this strain doping approach to morphotropic films creates a new phase space based on internal and external lattice stress that can be seen as an analogue to temperature–composition phase diagrams of classical morphotropic ferroelectric systems.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1505299
- Journal Information:
- Nano Letters, Journal Name: Nano Letters Journal Issue: 2 Vol. 19; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Reconfigurable lateral anionic heterostructures in oxide thin films via lithographically defined topochemistry
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journal | July 2019 |
Optical response of BiFe O 3 films subjected to uniaxial strain
|
journal | September 2019 |
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