Ultrathin Fe layers on Ag (100) surface
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説明
Abstract Iron layers (0.15–10 ML thick) deposited on Ag (1 0 0) substrates were investigated by conversion electron Mossbauer 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 10 ML thickness values. The Mossbauer spectra showed systematic thickness dependence. At low thickness values, broad doublets were observed, while above 6 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 ≃40 T. The latter value is the highest ever measured for iron in thin layers.
収録刊行物
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- Surface Science
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Surface Science 601 2525-2531, 2007-06-01
Elsevier BV