MAGNETIC AND STRUCTURAL-PROPERTIES OF FE NB MULTILAYERS/

MBE grown Fe/Nb multilayers were characterized by means of X-ray diffr action in small and high angle regions, and neutron reflectivity measu rements. It can be observed that this system has an oscillating ferro/ antiferromagnetic ground state depending on the Nb thickness. The cohe rent long range magnetic order was found to be irreversible, i.e. it g ets lost if one cycles the films in an external magnetic field. The in fluence of hydrogen charging on the magnetic and structural properties of the multilayers was studied.