Oxygen vacancy enhanced ferroelectricity in BTO: SRO nanocomposite films
The enhancement of ferroelectric properties in lead-free ferroelectric is usually achieved by strain engineering. Here, we report a surprising polarization enhancement effect in an isostructural ferroelectric nanocomposite system composited by the ferroelectric material of BaTiO3 and metallic non-fe...
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| Hauptverfasser: | , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
13 August 2020
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| In: |
Acta materialia
Year: 2020, Jahrgang: 199, Pages: 9-18 |
| ISSN: | 1873-2453 |
| DOI: | 10.1016/j.actamat.2020.08.016 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.actamat.2020.08.016 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S1359645420306133 
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| Verfasserangaben: | Jun Liang Lin, Ri He, Zengxing Lu, Yi Lu, Zhiming Wang, Zhicheng Zhong, Xiang Zhao, Run-Wei Li, Zhi Dong Zhang, Zhan Jie Wang |
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| 245 | 1 | 0 | |a Oxygen vacancy enhanced ferroelectricity in BTO |b SRO nanocomposite films |c Jun Liang Lin, Ri He, Zengxing Lu, Yi Lu, Zhiming Wang, Zhicheng Zhong, Xiang Zhao, Run-Wei Li, Zhi Dong Zhang, Zhan Jie Wang |
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| 520 | |a The enhancement of ferroelectric properties in lead-free ferroelectric is usually achieved by strain engineering. Here, we report a surprising polarization enhancement effect in an isostructural ferroelectric nanocomposite system composited by the ferroelectric material of BaTiO3 and metallic non-ferroelectric oxide of SrRuO3. BaTiO3:SrRuO3 (BTO:SRO) ferroelectric nanocomposite films with the volume ratio of nanogranular SRO ranging from 0 to 16% grown on the Nb-doped SrTiO3 (NSTO) single-crystal substrates by pulsed laser deposition (PLD) are investigated. Robust ferroelectric polarization is observed with a remanent polarization of about 40 μC/cm2, comparable to those found in Pb(ZrxTi1-x)O3 thin films. By combining X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), density functional theory (DFT) calculations, and phase-field simulation, a hypothesis has been proposed that the polarization enhancement may be mainly attributed to the accumulation of oxygen vacancies at the BTO/SRO interface rather than lattice mismatch strain. The novel mechanism of polarization enhancement opens new possibilities for designing future ferroelectric devices. | ||
| 650 | 4 | |a Ferroelectricity | |
| 650 | 4 | |a First-principles calculations | |
| 650 | 4 | |a Laser deposition | |
| 650 | 4 | |a Nanocomposite | |
| 650 | 4 | |a Oxygen vacancy | |
| 700 | 1 | |a He, Ri |e VerfasserIn |4 aut | |
| 700 | 1 | |a Lu, Zengxing |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Wang, Zhiming |e VerfasserIn |4 aut | |
| 700 | 1 | |a Zhong, Zhicheng |e VerfasserIn |4 aut | |
| 700 | 1 | |a Zhao, Xiang |e VerfasserIn |4 aut | |
| 700 | 1 | |a Li, Run-Wei |e VerfasserIn |4 aut | |
| 700 | 1 | |a Zhang, Zhi Dong |e VerfasserIn |4 aut | |
| 700 | 1 | |a Wang, Zhan Jie |e VerfasserIn |4 aut | |
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