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Growth and atomic structure of ordered Mn surface alloys on Au(001)

Growth and atomic structure of ordered Mn surface alloys on Au(001) The atomic structures of two different, ordered Mn surface alloys on Au(001) are studied by the low-energy electron diffraction IV (spot intensity vs incident electron energy) analysis. The first one is formed of a subsurface c ( 2 × 2 ) alloy layer beneath 1-monolayer- (ML) thick Au capping layer, 1-ML Au/1-ML c ( 2 × 2 ) Au-Mn/Au(001). The atomic structure is just like the bulk terminated Au 3 Mn ( 001 ) with small surface relaxation. The second alloy film is largely formed of trilayer, AuMn 3 ( 001 ) -like structure, c ( 2 × 2 ) 1-ML Au-Mn/1-ML Mn/1-ML c ( 2 × 2 ) Mn - Au / Au ( 001 ) , where the position of Mn and Au in the third layer is exchanged with respect to those of the first layer to reduce the strain normal to the surface. Contrary to the first-ordered alloy, we find large contraction of the layer spacing and the strong buckling of Mn atoms in the surface layer for the second one. We discuss the energetics relevant to the formation of the observed alloy structures. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Growth and atomic structure of ordered Mn surface alloys on Au(001)

Physical Review B , Volume 65 (20) – May 15, 2002
7 pages

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Publisher
American Physical Society (APS)
Copyright
Copyright © 2002 The American Physical Society
ISSN
1095-3795
DOI
10.1103/PhysRevB.65.205407
Publisher site
See Article on Publisher Site

Abstract

The atomic structures of two different, ordered Mn surface alloys on Au(001) are studied by the low-energy electron diffraction IV (spot intensity vs incident electron energy) analysis. The first one is formed of a subsurface c ( 2 × 2 ) alloy layer beneath 1-monolayer- (ML) thick Au capping layer, 1-ML Au/1-ML c ( 2 × 2 ) Au-Mn/Au(001). The atomic structure is just like the bulk terminated Au 3 Mn ( 001 ) with small surface relaxation. The second alloy film is largely formed of trilayer, AuMn 3 ( 001 ) -like structure, c ( 2 × 2 ) 1-ML Au-Mn/1-ML Mn/1-ML c ( 2 × 2 ) Mn - Au / Au ( 001 ) , where the position of Mn and Au in the third layer is exchanged with respect to those of the first layer to reduce the strain normal to the surface. Contrary to the first-ordered alloy, we find large contraction of the layer spacing and the strong buckling of Mn atoms in the surface layer for the second one. We discuss the energetics relevant to the formation of the observed alloy structures.

Journal

Physical Review BAmerican Physical Society (APS)

Published: May 15, 2002

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