The structural determination of Au(1ML)/Fe(15ML)/Au(100) using angle-resolved photoemission extended fine structure
- Univ. of California, Berkeley, CA (United States). Dept. of Chemistry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Pennsylvania State Univ., University Park, PA (United States). Dept. of Chemistry and Physics
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
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 initial 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.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 603670
- Report Number(s):
- LBNL--39981; ON: DE97007345
- Country of Publication:
- United States
- Language:
- English
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