Dj. Keavney et al., INTERLAYER COUPLING IN EPITAXIAL FE(110) AG(111) MULTILAYERS/, Journal of magnetism and magnetic materials, 121(1-3), 1993, pp. 283-285
We have detected a possible oscillatory interlayer coupling in Fe(110)
/Ag(111) mulilayers grown by molecular beam epitaxy. The oscillation p
eriod is between 5 and 9 ML. The coupling was examined using a site-sp
ecific Mossbauer spectroscopy technique to determine the spin-wave spe
ctrum at the first two monolayers of the Fe(110) surface. As the inter
layer exchange decreases, the spin-wave spectrum softens, resulting in
a faster decrease in the nuclear hyperfine field with temperature. At
an interlayer thickness of 6 ML, the coupling is so strong that the s
pin-wave spectrum appears almost bulk-like.