期刊
NANO LETTERS
卷 11, 期 8, 页码 3346-3354出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl201719w
关键词
Bismuth ferrite; mixed phase; cantilever resonance tracking; PFM
类别
资金
- ARC [DP1096669]
- Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. Department of Energy
- NSF [1006194]
- ARO [W911NF-07-1-0410]
- National Science Council, R.O.C. [NSC-99-2811-M-009-003]
- NSFC [10732100, 10972189]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1006194] Funding Source: National Science Foundation
- Australian Research Council [DP1096669] Funding Source: Australian Research Council
Development of magnetoelectric, electromechanical, and photovoltaic devices based on mixed-phase rhombohedral-tetragonal (R-T) BiFeO3 (BFO) systems is possible only if the control of the engineered R phase variants is realized. Accordingly, we explore the mechanism of a bias induced phase transformation in this system. Single point spectroscopy demonstrates that the T -> R transition is activated at lower voltages compared to T -> - T polarization switching. With phase field modeling, the transition is shown to be electrically driven. We further demonstrate that symmetry of formed R-phase rosettes can be broken by a proximal probe motion, allowing controlled creation of R variants with defined orientation. This approach opens a pathway to designing next-generation magnetoelectronic and data storage devices in the nanoscale.
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