Magnetic properties of interleaved Fe(3 ML)/V(x ML)/Fe(2 ML)/V(x ML) superlattices

The magnetic properties of the Fe(3 monolayers (ML))/V(xML)/Fe(2ML)/V(xML) (4less than or equal toxless than or equal to15) films prepared by DC magnetron sputtering on MgO(0 0 1) substrates are investigated by SQUID measurements, The basic observables of the films: the transition temperature T-c the magnetic remanence M-r and the saturation field H-s change in a correlated way with the change of the V spacer thickness, x. Ferromagnetic and antiferromagnetic-coupling x-ranges are indicated for this system, and the interlayer exchange energy is estimated based on the dependence of H-s on x. (C) 2002 Published by Elsevier Science B.V.