ISSN:
1432-0630
Keywords:
PACS: 61.10.Nz; 68.35.Bs; 77.84.Dy; 81.70. Jb
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract. The combination of x-ray diffraction analysis with surface sensitive techniques reveals a chemical inhomogeneity in the surface region of monocrystals of SrTiO3 prepared under low and high partial pressure of oxygen at elevated temperatures. A solid state reaction leads to the formation of a multilayer-type structure. For oxidized crystals we observe AO-rich Ruddlesden-Popper phases at the surface and Magnelli phases of Ti in deeper layers of the surface region. The order of the layered structure is reversed for the reduced crystals with Ti-oxides of different oxidation levels at the surface and Ruddlesden-Popper phases in lower parts of the surface region. It is argued that this restructuring influences the electrical properties of SrTiO3.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003390050443
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