“…Gopalan and Cottam [23] have used the s±d interaction model to study the bulk and surface magnetic excitations of a semi-infinite FMS. Results are deduced for both narrow-band and wide-band FMS, but only for low temperatures, T ( T C , where the magnetization hS z i S. Wesselinowa et al [24] have calculated the surface excitations and surface magnetization in FMSs using a Green's function technique combined with the transfer-matrix method in both cases, narrow-band as well as wide-band FMSs for all temperatures below T C . The aim of the present paper is to study the magnetization and the Curie temperature in dependence on the thickness of a thin FMS-ing film containing conduction-band electrons and localized spins, using a Green's function theory developed for ferromagnetic thin films by Haubenreisser et al [25].…”