COMPOSITIONAL OSCILLATIONS AND STRAIN EFFECTS AT THE ANNEALEDCo/Pd(100)INTERFACE: A STUDY BY X-RAY PHOTOELECTRON DIFFRACTION AND LOW ENERGY ION SCATTERING

Andrea Atrei, HÉlÈNE Giordano, Marco Torrini, Ugo Bardi (), Michael Gleeson and Colin Barnes
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Andrea Atrei: Dipartimento di Chimica, Universita' di Firenze, Via G. Capponi 9, 50121 Firenze, Italy
HÉlÈNE Giordano: Dipartimento di Chimica, Universita' di Firenze, Via G. Capponi 9, 50121 Firenze, Italy
Marco Torrini: Dipartimento di Chimica, Universita' di Firenze, Via G. Capponi 9, 50121 Firenze, Italy
Ugo Bardi: Dipartimento di Chimica, Universita' di Firenze, Via G. Capponi 9, 50121 Firenze, Italy;
Michael Gleeson: Dublin City University, School of Chemical Sciences Dublin 9, Ireland
Colin Barnes: Dublin City University, School of Chemical Sciences Dublin 9, Ireland

Surface Review and Letters (SRL), 1997, vol. 04, issue 06, 1123-1129

Abstract: The properties of the interface obtained by cobalt deposition on the Pd(100) surface and successive annealing have been studied by X-ray photoelectron diffraction (XPD) and low energy ion scattering (LEIS). The "as deposited" cobalt layer shows considerable lattice strain (about 10%) for coverages up to approximately 20-monolayer equivalents. Annealing at temperatures of the order of 700 K leads to intermixing with the formation of a surface alloy and the partial release of the strain. The combination of LEIS and XPD measurements shows that cobalt in the surface phase is preferentially located in the second outermost layer from the surface.

Date: 1997
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DOI: 10.1142/S0218625X97001413

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