Monolayer resolved oscillating hyperfine fields in epitaxial face-centered-tetragonal Co(001) films |
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| Authors: | Wieldraaijer H de Jonge W J M Kohlhepp J T |
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| Institution: | Eindhoven University of Technology, Department of Applied Physics, center for NanoMaterials (cNM) and COBRA Research Institute, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. |
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| Abstract: | Ultrahigh-quality thin fct-Co films grown on Cu(001) have been investigated by 59Co nuclear magnetic resonance. The influence of the spin-dependent electron scattering at the interfaces is observed for at least four Co atomic layers from the interface with monolayer resolution. An oscillatory effect on the Co hyperfine field with a period of several monolayers is measured, corresponding to the oscillating conduction electron polarization. The observation is exclusively possible in this system due to its very narrow resonance lines, corresponding to a virtually perfect Co structure. |
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