NMR studies of a thin cobalt film on a gold substrate

Co spin-echo NMR has been observed at 1.8K in a polycrystalline Co layer of 80 AA thickness, sandwiched by Au. This film was measured to have the HCP structure with the c axis perpendicular to the film plane. The hyperfine tensor deduced from the variation of the resonance frequency under a DC magnetic field is close to that reported on bulk HCP cobalt.