Direct observations of adatom–surface-atom replacement: Pt on Ni(110)

Phys. Rev. Lett. 67, 216 – Published 8 July 1991
G. L. Kellogg


Field-ion-microscope observations provide direct evidence that Pt adatoms replace Ni(110) surface atoms at temperatures above 105 K. The directions of the individual displacements in this replacement process are consistent with a model involving concerted motion of the adatom and substrate atom. The activation barrier for the exchange is estimated to be 0.28 eV.


  • Received 19 March 1991
  • Published in the issue dated 8 July 1991

© 1991 The American Physical Society

Authors & Affiliations

G. L. Kellogg

  • Sandia National Laboratories, Albuquerque, New Mexico 87185

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