Journal
PHYSICAL REVIEW MATERIALS
Volume 5, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.5.L092401
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Funding
- Vienna Science and Technology Fund (WWTF)
- City of Vienna
- Berndorf Privatstiftung [MA 16-005]
- Austrian Science Foundation (FWF) [(SFB) F81, F45]
- Doctoral School TU-D of the TU Wien
- Austrian Science Fund (FWF) [F45] Funding Source: Austrian Science Fund (FWF)
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The surface reconstructions of (110)-oriented lanthanum strontium manganite (LSMO) were studied as a function of oxygen chemical potential and surface cation composition. Decreasing oxygen chemical potential led to phase separation and structurally diverse reconstructions on the surface. The composition of these phase-separated structures was quantified and used to construct a two-dimensional phase diagram of the LSMO(110) equilibrium surface structures.
The many surface reconstructions of (110)-oriented lanthanum strontium manganite (La0.8Sr0.2MnO3, LSMO) were followed as a function of the oxygen chemical potential (mu(O)) and the surface cation composition. Decreasing mu(O) causes Mn to migrate across the surface, enforcing phase separation into A-site-rich areas and a variety of composition-related, structurally diverse B-site-rich reconstructions. The composition of these phase-separated structures was quantified with scanning tunneling microscopy, and these results were used to build a two-dimensional phase diagram of the LSMO(110) equilibrium surface structures.
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