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Ti- and Sr-rich surfaces of SrTiO[sub 3] studied by grazing incidence x-ray diffraction
Authors:
A.
Fragneto
(CNR-Spin, Italy)
,
G. M.
De Luca
(CNR-Spin, Italy)
,
R.
Di Capua
(CNR-Spin, Italy)
,
U.
Scotti Di Uccio
(CNR-Spin, Italy)
,
M.
Salluzzo
(CNR-Spin, Italy)
,
X.
Torrelles
(Institut de Ciencia de Materials de Barcelona, Spain)
,
Tien-lin
Lee
(Diamond Light Source)
,
J.
Zegenhagen
(ESRF, France)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Applied Physics Letters
, VOL 91 (10)
State:
Published (Approved)
Published:
September 2007
Abstract: The structure of SrTiO3 (100) (STO) single crystal surfaces has been investigated by grazing incidence x-ray diffraction. The authors found that chemically etched STO is composed - 75% of an ideal TiO2 surface layer and - 25% of SrO and it is very stable when annealed in ultrahigh vacuum or in O2 at high temperatures. A monolayer of SrO, epitaxially grown by pulsed laser deposition, is found to cover only a fraction of the TiO2 layers and exhibits a 2×2 reconstruction with strong structural changes after annealing in conditions typically used for the deposition of oxides.
Subject Areas:
Physics
Facility: ESRF