Surface diffusion and adatom-induced substrate relaxations of Pt, Pd, and Ni atoms on Pt(001)

Journal Article · Wed May 01 00:00:00 EDT 1991 · Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA)

DOI:https://doi.org/10.1116/1.577457· OSTI ID:5564431

Kellogg, G L ^[1]; Wright, A F; Daw, M S ^[2]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (USA)
2. Sandia National Laboratories, Livermore, California 94551 (USA)

Field ion microscope observations show that Pt atoms diffuse on Pt(001) by an adatom--substrate atom replacement mechanism, whereas Pd atoms diffuse on the same surface by site-to-site hopping. Ni adatoms are observed to exchange with substrate Pt(001) atoms at temperatures lower than the onset of their migration. The propensity for adatom--substrate atom exchange is found to be correlated with the amount of adatom-induced substrate relaxation. These relaxations are determined from calculations based on the embedded atom method.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5564431
• Journal Information: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA), Journal Name: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA) Vol. 9:3; ISSN JVTAD; ISSN 0734-2101
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ADSORPTION
ATOM TRANSPORT
DIFFUSION
ELEMENTS
ION MICROSCOPY
METALS
MICROSCOPY
NEUTRAL-PARTICLE TRANSPORT
NICKEL
PALLADIUM
PLATINUM
PLATINUM METALS
RADIATION TRANSPORT
RELAXATION
SORPTION
TRANSITION ELEMENTS