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Ordered and disordered rippling in the CoAl(110)-(1 × 1) surface

Publication ,  Journal Article
Blum, V; Rath, C; Castro, GR; Kottcke, M; Hammer, L; Heinz, K
Published in: Surface Review and Letters
1996

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 Pendry R factor value of R = 0.10.

Duke Scholars

Published In

Surface Review and Letters

Publication Date

1996

Volume

3

Issue

3

Start / End Page

1409 / 1415

Related Subject Headings

  • Chemical Physics
  • 0306 Physical Chemistry (incl. Structural)
  • 0206 Quantum Physics
 

Citation

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Blum, V., Rath, C., Castro, G. R., Kottcke, M., Hammer, L., & Heinz, K. (1996). Ordered and disordered rippling in the CoAl(110)-(1 × 1) surface. Surface Review and Letters, 3(3), 1409–1415.
Blum, V., C. Rath, G. R. Castro, M. Kottcke, L. Hammer, and K. Heinz. “Ordered and disordered rippling in the CoAl(110)-(1 × 1) surface.” Surface Review and Letters 3, no. 3 (1996): 1409–15.
Blum V, Rath C, Castro GR, Kottcke M, Hammer L, Heinz K. Ordered and disordered rippling in the CoAl(110)-(1 × 1) surface. Surface Review and Letters. 1996;3(3):1409–15.
Blum, V., et al. “Ordered and disordered rippling in the CoAl(110)-(1 × 1) surface.” Surface Review and Letters, vol. 3, no. 3, 1996, pp. 1409–15.
Blum V, Rath C, Castro GR, Kottcke M, Hammer L, Heinz K. Ordered and disordered rippling in the CoAl(110)-(1 × 1) surface. Surface Review and Letters. 1996;3(3):1409–1415.

Published In

Surface Review and Letters

Publication Date

1996

Volume

3

Issue

3

Start / End Page

1409 / 1415

Related Subject Headings

  • Chemical Physics
  • 0306 Physical Chemistry (incl. Structural)
  • 0206 Quantum Physics