ORDERED AND DISORDERED RIPPLING IN THE CoAl(110)-(1×1) SURFACE

V. Blum, C. Rath, G.R. Castro, M. Kottcke, L. Hammer and K. Heinz
Additional contact information
V. Blum: Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7, D-91058 Erlangen, Germany
C. Rath: Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7, D-91058 Erlangen, Germany
G.R. Castro: Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7, D-91058 Erlangen, Germany
M. Kottcke: Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7, D-91058 Erlangen, Germany
L. Hammer: Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7, D-91058 Erlangen, Germany
K. Heinz: Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7, D-91058 Erlangen, Germany

Surface Review and Letters (SRL), 1996, vol. 03, issue 03, 1409-1415

Abstract: A quantitative structural analysis of CoAl(110)-(1×1) by low energy electron diffraction shows that the topmost layer of the surface is rippled by an amplitude of 0.18 Å, with aluminum atoms pulled out of the surface and the average distance to the second layer only slightly expanded. In contrast to the perfect stoichiometry found for the top layer and the chemical order in the bulk, about 20% of the second layer Al atoms are substituted by Co. This is probably due to preferential sputtering during the course of sample preparation and incomplete subsequent reordering. A new version of Tensor LEED allows the detection of some disordered rippling induced by the substitutional disorder in this layer, with substitutional cobalt being 0.05 Å above the ideal aluminum position. The quality of the theory–experiment fit is mirrored by a PendryRfactor value ofR=0.10.

Date: 1996
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X96002424
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:03:y:1996:i:03:n:s0218625x96002424

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X96002424

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().