层间介导的亚稳P63cm ScFeO3在Al2O3上的稳定

IF 4.4 3区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Marshall B. Frye, Mengkun Tian, Eoin Moynihan, Ana Sanchez, Lauren M. Garten
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引用次数: 0

摘要

如果能够确定稳定途径,ScFeO3的亚稳P63cm相具有在基态不可能实现的多铁应用潜力。通过扫描透射电子显微镜观察到,脉冲激光沉积过程中自发形成(111)Fm 3¯$ $\bar 3$ m FeO的两个原子层,并在接近界面时观察到Fe l边的移位,从而证明了ScFeO3的P63cm相在(0001)Al2O3上稳定下来。匹配的氧亚晶格和FeO间层的减小应变使ScFeO3[11¯$\bar 2$ 0] ||[1¯1¯$\bar 1\bar]成为可能1$ 2] FeO || Al2O3[11 2¯$\bar 2$ 0]取向关系,尽管晶格失配为- 17.1%。温度相关的x射线衍射进一步支持层间介导的稳定,因为FeO在850°C以上形成,在1000°C时形成P63cm ScFeO3相。FeO中间层的鉴定为P63cm ScFeO3的相稳定机制提供了深入的见解,并为稳定其他缺乏外延衬底的亚稳材料提供了策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Interlayer-Mediated Stabilization of Metastable P63cm ScFeO3 on Al2O3

Interlayer-Mediated Stabilization of Metastable P63cm ScFeO3 on Al2O3

The metastable P63cm phase of ScFeO3 has potential for multiferroic applications not possible in the ground state if stabilization routes can be identified. This work demonstrates that the P63cm phase of ScFeO3 is stabilized on (0001) Al2O3 by the spontaneous formation of two atomic layers of (111) Fm 3 ¯ $\bar 3$ m FeO during pulsed laser deposition, as observed via scanning transmission electron microscopy and a shift in the Fe L-edge on approaching the interface. The matching oxygen sublattice and reduced strain of the FeO interlayer enable a ScFeO3 [11 2 ¯ $\bar 2$ 0] || [ 1 ¯ 1 ¯ $\bar 1\bar 1$ 2] FeO || Al2O3 [11 2 ¯ $\bar 2$ 0] orientation relationship despite a −17.1% lattice mismatch. Temperature-dependent X-ray diffraction further support interlayer-mediated stabilization, as FeO forms above 850 °C, preceding the formation of the P63cm ScFeO3 phase at 1000 °C. The identification of the FeO interlayer provides insights into the phase stabilization mechanism of P63cm ScFeO3 and presents a strategy for stabilizing other metastable materials that lack epitaxial substrates.

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来源期刊
Advanced Materials Interfaces
Advanced Materials Interfaces CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
8.40
自引率
5.60%
发文量
1174
审稿时长
1.3 months
期刊介绍: Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018. The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface. Advanced Materials Interfaces covers all topics in interface-related research: Oil / water separation, Applications of nanostructured materials, 2D materials and heterostructures, Surfaces and interfaces in organic electronic devices, Catalysis and membranes, Self-assembly and nanopatterned surfaces, Composite and coating materials, Biointerfaces for technical and medical applications. Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.
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