Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Oxygen-induced stress-modified reconstructions of the Ta(110)/Al2O3(11-20)surface: a surface X-ray diffraction study
Autore:
Robach, O; Robinson, IK; Durfee, CS; Wiemeyer, BW; Flynn, CP;
Indirizzi:
European Synchrotron Radiat Facil, F-38043 Grenoble, France European Synchrotron Radiat Facil Grenoble France F-38043 enoble, France Univ Illinois, Dept Phys, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 linois, Dept Phys, Urbana, IL 61801 USA
Titolo Testata:
SURFACE SCIENCE
fascicolo: 1-2, volume: 492, anno: 2001,
pagine: 41 - 54
SICI:
0039-6028(20011010)492:1-2<41:OSROTT>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
EPITAXIAL NB-AL2O3 INTERFACES; ATOMIC-STRUCTURE; CRYSTAL; NB(110); GROWTH;
Keywords:
tantalum; oxidation; aluminum oxide; X-ray scattering, diffraction, and reflection; surface structure, morphology, roughness, and topography; surface relaxation and reconstruction; surface stress; metallic films;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Robach, O European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France European Synchrotron Radiat Facil BP 220 Grenoble France F-38043
Citazione:
O. Robach et al., "Oxygen-induced stress-modified reconstructions of the Ta(110)/Al2O3(11-20)surface: a surface X-ray diffraction study", SURF SCI, 492(1-2), 2001, pp. 41-54

Abstract

The knowledge of the surface structure of thick metallic buffer layers is important to understand subsequent growth. We present here a surface X-ray diffraction study of an oxygen-induced surface reconstruction observed on thick Ta(1 1 0) layers grown on sapphire (11 -20). The solving of the atomicstructure was performed using both Ta crystal truncation rods and superstructure rods. The model found for the reconstruction can be described as a misfit defect network at the interface between one plane of TaO(1 1 1) in Kurdjumov-Sachs epitaxy and the Ta. The reconstruction is not always commensurate. This probably arises from the coexistence of several commensurate supercells of slightly different periods. A small anisotropy (0.1-0.2%) of thein-plane lattice parameter of the Ta has been measured in all the samples. This anisotropy, which is due to the epitaxy on the sapphire, induces on the surface a selection of one of the two domains of the reconstruction. (C)2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 00:36:56