SURFACTANT-MEDIATED MODIFICATION OF THE MAGNETIC-PROPERTIES OF CO CU(111) THIN-FILMS AND SUPERLATTICES/

Deposition of ph on Cu(lll) prior to the growth of Co/Cu superlattices changes the magnetic properties of the latter. The use of a surfactan t induces layer-by-layer growth of Co and delays the fee to hcp struct ural transition. As a consequence, the easy axis of magnetization rema ins perpendicular to the plane for Co/Cu films grown with Pb. On the o ther hand, the elimination of twinning in the Cu spacers grown with su rfactants allows the observation of complete antiferromagnetic couplin g in Co/Cu superlattices for both in-plane and out-of-plane magnetizat ion.