Surface faceting of vicinal SrTiO3(100)

We report on transformations of the vicinal (100) surface of single crystalline SrTiO3 upon annealing in air at high temperatures. The surface (decomposes) facets into a step and terrace (hill and valley) structure determined by the thermodynamic equilibrium state. It is demonstrated that the surfac...

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Bibliographic Details
Published inMaterials today : proceedings Vol. 71; pp. 69 - 77
Main Authors Toktarbaiuly, Olzat, Syrlybekov, Askar, Nuraje, Nurxat, Sugurbekova, Gulnar, Shvets, Igor V.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2022
Subjects
Annealing
Faceting
Strontium titanium oxide
Surface morphology
Vicinal surface
Vicinal surface
Annealing
Strontium titanium oxide
Surface morphology
Faceting
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Summary:We report on transformations of the vicinal (100) surface of single crystalline SrTiO3 upon annealing in air at high temperatures. The surface (decomposes) facets into a step and terrace (hill and valley) structure determined by the thermodynamic equilibrium state. It is demonstrated that the surface morphology can be fully tuned in the sub-micron range by controlling annealing temperatures and miscut angle. Step and terrace structures have been observed in the temperature range 1160–1420 °C. The surfaces were characterized by atomic force microscope, X-ray diffraction, transmission electron microscope, and X-ray photoelectron spectroscopy to assess the roles of temperature, miscut, defects and impurities on the final morphology. The slope of the steps is revealed by cross-sectioning of the facetted surface.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2022.08.283