Wieldraaijer H, de Jonge WJM, Kohlhepp JT. Monolayer resolved oscillating hyperfine fields in epitaxial face-centered-tetragonal Co(001) films.
PHYSICAL REVIEW LETTERS 2004;
93:177205. [PMID:
15525122 DOI:
10.1103/physrevlett.93.177205]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2004] [Indexed: 05/24/2023]
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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