Magnetic coupling in Fe/Nb multilayers: A neutron reflectivity study
Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, D-14109 Berlin, Germany
Accepted: 20 February 1997
Fe/Nb multilayers with different Nb layer thicknesses were investigated by neutron reflectometry. In accordance with previous work, we find that magnetic coupling of the Fe layers oscillates between ferro- and antiferromagnetic as a function of the Nb spacer layer thickness for . However, for larger Nb thicknesses only antiferromagnetic ordering, probably caused by dipolar coupling, is observed. Magnetic domains have lateral extensions of 0.7 to as derived from off-specular reflectivity; the domain sizes oscillate correlated with the strength of the coupling.
PACS: 75.70.-i – Magnetic films and multilayers / 75.30.Et – Exchange and superexchange interactions / 61.12.Ex – Neutron scattering techniques (including small-angle scattering)
© EDP Sciences, 1997