Monolayer resolved oscillating hyperfine fields in epitaxial face-centered-tetragonal Co(001) films.
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.
Wieldraaijer
H
H
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.
de Jonge
W J M
WJ
Kohlhepp
J T
JT