Affordable Access

Publisher Website

Temperature-dependent shape transformation of Co clusters on Ag/Ge (1 1 1) √3 × √3 surfaces

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
600
Issue
18
Identifiers
DOI: 10.1016/j.susc.2006.01.166
Keywords
  • Scanning Tunnelling Microscopy
  • Nucleation
  • Surface Thermodynamics
  • Growth
  • Cobalt
  • Germanium
  • Silver
  • Metal-Semiconductor Magnetic Thin Film Structures

Abstract

Abstract The shapes and structures of cobalt islands on Ag/Ge (1 1 1) √3 × √3 surfaces were studied using a scanning tunnelling microscope and low-energy electron diffraction techniques. Cobalt islands with periodic structures on their flat top layers were found after annealing at 200–300 °C. This new structure of the islands shows reflection symmetry and the mirror planes are along [−2 1 1], [1 1 −2], and [1 −2 1] axes of the Ge (1 1 1) surface. Annealing treatments at temperatures above 200 °C cause the cobalt atoms nucleate to form larger and higher islands. As a consequence, the island densities decrease rapidly as the temperature increases. In addition, an obvious structural and shape transformation of the cobalt islands occurs at 400–500 °C. These changes include the hexagonal shapes of islands, compact arrangement of the surface atoms with hexagonal symmetry, and looser layer separations. These phenomena can be explained by various atomic processes at different temperatures and the interactions between cobalt and the germanium substrate through the silver layer.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Temperature dependent luminescence of Bi4Ge3O12dis...

on Journal of Luminescence Jan 01, 1976

The shape of germanium clusters to come.

on Angewandte Chemie Internationa... 2009

Influence of aging on phase transformation and mic...

on Journal of Alloys and Compound...

Influence of aging on phase transformation and mic...

on Journal of Alloys and Compound... Dec 05, 2014
More articles like this..