Thickness dependent formation and properties of GdSi2/Si(100) interfaces |
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Authors: | G Petõ G Molnár L Dózsa ZE Horváth ZsJ Horváth E Zsoldos CA Dimitriadis L Papadimitriou |
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Institution: | (1) Research Institute for Technical Physics and Materials Science, 1525 Budapest, PO. Box 49, Hungary;(2) Department of Physics, University of Thessaloniki, 54006 Thessaloniki, Greece |
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Abstract: | Epitaxial and polycrystalline orthorhombic GdSi2 films were grown on Si(100) substrates by solid phase reaction between Si and Gd films at different thicknesses of the Gd film . The most important property of these GdSi2/Si interfaces was defect formation. This was investigated by studying the properties of the Schottky barriers by means of current voltage and capacitance–voltage characteristics, deep level transient spectroscopy by double crystal X-ray diffractometry, and transmission electron microscopy. Epitaxial growth of the silicide layer ensured a relatively low interface defect density (about 1010 cm-2), while the non-epitaxial growth induced defects of a much higher density (about 1012 cm-2). The defects generated during the silicide formation are located within a depth of about 10 nm from the GdSi2/Si interface. PACS 68.55.-a; 73.40.-c; 81.15-zThis revised version was published in March 2005. References 10-17 were added in the online version (pdf file). |
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