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STRUCTURAL STUDY OF ALLOY FORMATION AT THECo-Pt(111)INTERFACE

Author

Listed:
  • MONICA GALEOTTI

    (Dipartimento di Chimica, Università di Firenze, Via G. Capponi 9, 50121 Firenze, Italy)

  • ANDREA ATREI

    (Dipartimento di Chimica, Università di Firenze, Via G. Capponi 9, 50121 Firenze, Italy)

  • UGO BARDI

    (Dipartimento di Chimica, Università di Firenze, Via G. Capponi 9, 50121 Firenze, Italy)

  • BRUNETTO CORTIGIANI

    (Dipartimento di Chimica, Università di Firenze, Via G. Capponi 9, 50121 Firenze, Italy)

  • GIANFRANCO ROVIDA

    (Dipartimento di Chimica, Università di Firenze, Via G. Capponi 9, 50121 Firenze, Italy)

  • MARCO TORRINI

    (Dipartimento di Chimica, Università di Firenze, Via G. Capponi 9, 50121 Firenze, Italy)

Abstract

This study examines the structure of the surface alloys that form at the surface of the system formed by depositing cobalt on the cleanPt(111)surface. Using mainly XPD as a structure-sensitive technique, surface alloys were observed to form in this system after annealing at temperatures of about 600 K or higher. When starting with a single atomic layer of cobalt, diffusion leads to a surface phase where Pt atoms occupy mainly the topmost layer while cobalt atoms are mainly located in the second layer from the surface. Multi-atomic-layer alloying, with the formation of an epitaxial, random substitutionalCo-Pt(111)alloy, is observed at higher temperatures.

Suggested Citation

  • Monica Galeotti & Andrea Atrei & Ugo Bardi & Brunetto Cortigiani & Gianfranco Rovida & Marco Torrini, 1996. "STRUCTURAL STUDY OF ALLOY FORMATION AT THECo-Pt(111)INTERFACE," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(05n06), pages 1691-1700.
    • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:05n06:n:s0218625x96002631
    DOI: 10.1142/S0218625X96002631
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