Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5425051 | Surface Science | 2007 | 7 Pages |
Iron layers (0.15-10Â ML thick) deposited on Ag (1Â 0Â 0) substrates were investigated by conversion electron Mössbauer spectrometry over a broad temperature range. The layers were characterized by scanning tunneling microscopy. Different forms of the layers, depending on their thickness, were observed. Minimum roughness of the layers were found at 0.15 and 10Â ML thickness values. The Mössbauer spectra showed systematic thickness dependence. At low thickness values, broad doublets were observed, while above 6Â ML, magnetic split spectra appeared at room temperature. At low temperatures, magnetically split spectra appeared with parameter values characteristic of Fe-Ag and Fe-Fe atomic interactions. The hyperfine split spectra indicated magnetic anisotropy and an enhanced saturation hyperfine magnetic field of â40Â T. The latter value is the highest ever measured for iron in thin layers.