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X-ray Scattering Measurements of the Ag(111) Surface Thermal Expansion

Published online by Cambridge University Press:  21 March 2011

Cristian E. Botez ,
William C. Elliott ,
Paul F. Miceli  and
Peter W. Stephens
Cristian E. Botez
Affiliation:
Department of Physics and Astronomy, University of Missouri-Columbia, Columbia, MO 65211, U.S.A.
William C. Elliott
Affiliation:
Department of Physics and Astronomy, University of Missouri-Columbia, Columbia, MO 65211, U.S.A.
Paul F. Miceli
Affiliation:
Department of Physics and Astronomy, University of Missouri-Columbia, Columbia, MO 65211, U.S.A.
Peter W. Stephens
Affiliation:
Department of Physics, State University of New York, Stony Brook, NY 11794, U.S.A.
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Abstract

We have used synchrotron X-ray diffraction to study the thermal expansion of the Ag(111) surface. Throughout the temperature interval between 300 and 1100K, we observed that the separation between the first and the second atomic layers at the surface, 12 d, differs from its bulk counterpart, d, by less than 1%, indicating that the thermal expansion at the surface is similar to the one in the bulk. This result represents the first experimental confirmation of the predictions from molecular dynamics simulations, which indicate a small enhancement of the anharmonic effects at this surface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 678: Symposia EE – Applications of Synchrotron Radiation Techniques…IV , 2001 , EE9.3.1
Copyright
Copyright © Materials Research Society 2001

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