Ferromagnetic and nuclear magnetic resonance studies of Co/Cu(111) superlattices: anisotropy and structural properties

Abstract

Ferromagnetic (FMR) and nuclear magnetic (NMR) resonance studies of MBE grown Co/Cu(111) superlattices are presented. With FMR, the sixfold magnetocrystalline in-plane anisotropy, K 4, is determined as a function of temperature, T. It is shown that K 4 differs from the bulk hcp value not only quantitatively (i.e. in magnitude) but also qualitatively in the sense that its temperature dependence is significantly weaker. Both features are explained by the dominating fcc stacking proved by our 59Co NMR and X-ray investigations.