Surface structure determination of Au(1 ML)/Fe(15 ML)/Au(100) using angle-resolved photoemission extended fine structure
| Autor: | S. A. Kellar, Yongsheng Chen, Zahid Hussain, D.A. Shirley, Edward Moler, W.R.A. Huff |
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| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Physical Review B. 57:1890-1895 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.57.1890 |
| Popis: | A great amount of attention has been given to investigating thin magnetic films and magnetic multilayers, especially systems involving iron and the noble metals. In most of these studies the authors assume that the Fe layers will maintain bulk spacing even at interfaces. However, it is well known that for the clean metal the first and second layer spacing is contracted from the bulk value, and that absorbates can significantly expand this spacing. Atomic structural details about these interfaces is important because the electronic states that are localized at the interface between the two different materials are critical in determining the magnetic properties of ultra-thin films and multilayers. In this study the authors use Angle-Resolved Photoemission Extended Fine Structure (ARPEFS) to investigate thin (ca. 10 and 15 monolayers) Fe films grown on a Au(100) single crystal. ARPEFS is a well established technique for determining the atomic structure of atomic and molecular adsorbates on metal surfaces. The technique`s advantages are its atomic selectivity due to the unique binding energies of core level electrons, the large oscillations, which in this study are +/- 40%, and its inherent accuracy. In the past, structural determinations have only been done with ARPEFS signals from initialmore » states with zero angular momentum because of the difficulties in treating non-s initial states in the scattering calculations. This study presents the first structure determination of a bimetallic system using the ARPEFS from non-s initial states.« less |
| Databáze: | OpenAIRE |
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