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Tailoring Magnetoelectric Coupling in BiFeO3 /La0.7 Sr0.3 MnO3 Heterostructure through the Interface Engineering
Di Yi1, Pu Yu2, Yi-Chun Chen3
1Department of Materials Science and Engineering and Department of Physics, University of California, Berkeley, Berkeley, CA, 94720, USA.
Advanced Materials (Deerfield Beach, Fla.)
|January 22, 2019
Summary
Interface engineering in BiFeO3/La0.7Sr0.3MnO3 heterostructures enables electric field control of magnetism. Atomic-level interface design is crucial for developing energy-efficient spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Electric field control of magnetism is key for low-power electronics.
- Magnetoelectric (ME) coupling in oxide heterostructures like BiFeO3 (BFO) and La0.7Sr0.3MnO3 (LSMO) is promising.
- The influence of polar heterointerfaces on ME coupling requires further investigation.
Purpose of the Study:
- To investigate magnetoelectric coupling in BFO/LSMO heterostructures with controlled interfaces.
- To explore the impact of interfacial atomic sequence on ME coupling.
- To understand the fundamental physics of ME coupling in this model system.
Main Methods:
- Fabrication of all-oxide BFO/LSMO heterostructures.
- Atomic-scale interface engineering to create distinct interfacial structures.
- Experimental characterization of magnetization and exchange bias modulation.
Main Results:
- Reversible control of magnetization and exchange bias by switching BFO ferroelectric polarization.
- Observation of distinct modulation behaviors dependent on the interfacial atomic sequence.
- Demonstration of significant magnetoelectric coupling influenced by interface structure.
Conclusions:
- Interface design at the atomic scale is critical for optimizing magnetoelectric coupling.
- Tailoring interfacial atomic sequences offers a pathway to control magnetic properties.
- This research provides fundamental insights for designing advanced spintronic devices.
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