MAGNETIC STUDIES IN (CO V) MULTILAYERS

The magnetization and anistoropy of (Co/V)(n) multilayers prepared by e-beam evaporation under ultrahigh vacuum are presented. The magnetiza tion at 5 K suggests one atomic layer of Co to be nonmagnetic. The ove rall magnetization is found to have an unusual linear temperature depe ndence, which follows the relation M(T)/M(5 K) = 1 - AT and the consta nt A depends on t(Co). The Linear temperature dependence of magnetizat ion is attributed to the lowered dimensionality of the system and rath er weak interlayer coupling between two Cb layers. The surface (K-s) a nd bulk anisotropy (K-v) constants at room temperature are determined to be 0.5 erg cm(-2) and 9.4 10(6) erg cm(-3) respectively. Even thoug h the major contribution to K-v, in the (Co/V)(n) system, arises from the demagnetization energy, some arise from the magnetoelastic interac tions as well. (C) 1997 American Institute of Physics.