Improved growth and the spin reorientation transition of Ni on (√2×2√2)R45° reconstructed O/Cu(0 0 1) |
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Authors: | J Lindner P Poulopoulos R NünthelE Kosubek H WendeK Baberschke |
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Institution: | a Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, Berlin-Dahlem D-14195, Germany |
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Abstract: | Ni films between 1 and 20 monolayers (ML) thick are deposited at room temperature on clean and (√2×2√2)R45° reconstructed--via oxygen adsorption--Cu(0 0 1). A significant expansion of the out-of-plane Ni phase by about 5 ML is revealed by ferromagnetic resonance experiments. This shift of the spin reorientation transition is attributed to a huge change of about 90 μeV/atom in the surface anisotropy due to the presence of half a monolayer of oxygen atoms on the top of Ni. Furthermore, the growth of Ni on the preoxidized Cu surface is found to be closer to the layer-by-layer one as compared to the growth on the clean Cu(0 0 1) due to the presence of oxygen which acts as a surfactant. |
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Keywords: | Magnetic films Magnetic measurements Magnetic phenomena (cyclotron resonance phase transitions etc ) Nickel Copper Oxygen Single crystal surfaces |
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