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Applied Science and Convergence Technology 2007; 16(1): 1-6

Published online January 1, 2007

Copyright © The Korean Vacuum Society.

LEED I/V Curve Analysis of O/Fe(100) and MgO/Fe(100) System

J. K. Seo,S. H. Kim

Abstract

We have analyzed the atomic structure of O/Fe(100) and interface atomic structure of MgO deposited on Fe(100) surface using LEED I/V curve analysis. As the O adsorption on the Fe(100) surface, the first substrate interlayer distance is expanded by up to 16%. For 1ML MgO deposited on Fe(100) surface, the oxygen ions of MgO are located on-top of the Fe atoms, the interlayer distance at the MgO/Fe interface are expanded. From the AIA(average intensity mixing approximation) calculation, we find the interface structure of monolayer MgO on Fe(100) system has the two interface structure with MgO/FeO/Fe(100) and MgO/Fe(100). This supports the results of EELS experiment that shown existence of stretched FeO layer and coexistance of MgO/FeO/Fe(100) and MgO/Fe(100) structure.

Keywords: MgO,LEED I/V,Fe(100)

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