Abstract
Surface X-ray scattering was used to study structural modifications on the (0 0 1) surface of oxidized SrTiO3. Grazing incidence in-plane X-ray diffraction revealed a sequence of quasi-powder diffraction peaks originating from crystallites with nearly random in-plane orientation. This diffraction pattern is associated with micro-crystallites of irregular shape observed by atomic force microscopy on the surface after annealing in oxygen. Analysis based on available powder diffraction data identified these crystallites as monoclinic TiO. Different oxygen annealing treatments led to dramatic changes in the specular (0 0 L) crystal truncation rods indicating significant structural modifications in the underlying single crystal SrTiO3 surface layer.
Original language | English (US) |
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Pages (from-to) | L711-L716 |
Journal | Surface Science |
Volume | 492 |
Issue number | 1-2 |
DOIs | |
State | Published - Oct 10 2001 |
Externally published | Yes |
Funding
This work was supported by the NSF under contract nos. DMR-9973436 and DMR-0076097 to NU and by the DOE under contract nos. W-31-109-ENG-38 to ANL and DE-AC02-98CH10886 to NSLS. The High Temperature Materials Laboratory User Program, Oak Ridge National Laboratory, is supported by the DOE under contract DE-AC05-00OR22725.
Keywords
- Alkaline earth metals
- Atomic force microscopy
- Surface segregation
- Surface structure, morphology, roughness, and topography
- X-ray scattering, diffraction, and reflection
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry