Magnetic coupling in Fe/Nb multilayers: A neutron reflectivity study Ch. Rehm, D. Nagengast, F. Klose, H. Maletta and A. Weidinger Europhys. Lett., 38 1 (1997) 61-72 Published online: 01 September 2002 DOI: 10.1209/epl/i1997-00535-4