Details
| Original language | English |
|---|---|
| Pages (from-to) | 265-275 |
| Number of pages | 11 |
| Journal | Surface Science |
| Volume | 537 |
| Issue number | 1-3 |
| Publication status | Published - 1 Jul 2003 |
Abstract
The morphology of Ag(1,1,19) and the growth of thin MgO layers on it, mostly at room temperature, was investigated by LEED spot profile analysis. These measurements have been supplemented by UPS, XPS and EELS data in order to clarify the electronic structure of the films. Our LEED analysis shows that only steps of monoatomic height are formed on the vicinal Ag surface with a geometric terrace width distribution. The 2 monolayer (ML) thick MgO film does not completely cover the substrate. It forms pyramidal clusters on the surface. Thicker films are closed, and the coexistence of a stepped MgO film with the formation of mosaics is observed. At 5 ML about half of the MgO film consists of mosaics and of non-tilted MgO-crystallites. Their steps are mostly one atom high, with edges that point on average both in non-polar and in polar directions. The influence of the substrate structure on the morphology of the MgO films is discussed.
Keywords
- Growth, Magnesium oxides, Silver, Step formation and bunching, Surface structure, morphology, roughness, and topography, Vicinal single crystal surfaces
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Surface Science, Vol. 537, No. 1-3, 01.07.2003, p. 265-275.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Growth and surface morphology
T2 - Epitaxial MgO films and the Ag(1,1,19) substrate
AU - Kramer, J.
AU - Tegenkamp, Christoph
AU - Ernst, W.
AU - Pfnür, Herbert
PY - 2003/7/1
Y1 - 2003/7/1
N2 - The morphology of Ag(1,1,19) and the growth of thin MgO layers on it, mostly at room temperature, was investigated by LEED spot profile analysis. These measurements have been supplemented by UPS, XPS and EELS data in order to clarify the electronic structure of the films. Our LEED analysis shows that only steps of monoatomic height are formed on the vicinal Ag surface with a geometric terrace width distribution. The 2 monolayer (ML) thick MgO film does not completely cover the substrate. It forms pyramidal clusters on the surface. Thicker films are closed, and the coexistence of a stepped MgO film with the formation of mosaics is observed. At 5 ML about half of the MgO film consists of mosaics and of non-tilted MgO-crystallites. Their steps are mostly one atom high, with edges that point on average both in non-polar and in polar directions. The influence of the substrate structure on the morphology of the MgO films is discussed.
AB - The morphology of Ag(1,1,19) and the growth of thin MgO layers on it, mostly at room temperature, was investigated by LEED spot profile analysis. These measurements have been supplemented by UPS, XPS and EELS data in order to clarify the electronic structure of the films. Our LEED analysis shows that only steps of monoatomic height are formed on the vicinal Ag surface with a geometric terrace width distribution. The 2 monolayer (ML) thick MgO film does not completely cover the substrate. It forms pyramidal clusters on the surface. Thicker films are closed, and the coexistence of a stepped MgO film with the formation of mosaics is observed. At 5 ML about half of the MgO film consists of mosaics and of non-tilted MgO-crystallites. Their steps are mostly one atom high, with edges that point on average both in non-polar and in polar directions. The influence of the substrate structure on the morphology of the MgO films is discussed.
KW - Growth
KW - Magnesium oxides
KW - Silver
KW - Step formation and bunching
KW - Surface structure, morphology, roughness, and topography
KW - Vicinal single crystal surfaces
UR - http://www.scopus.com/inward/record.url?scp=0037735317&partnerID=8YFLogxK
U2 - 10.1016/S0039-6028(03)00634-4
DO - 10.1016/S0039-6028(03)00634-4
M3 - Article
AN - SCOPUS:0037735317
VL - 537
SP - 265
EP - 275
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 1-3
ER -