抄録
The effects of several surfactants (Pb, Bi, and Ag) on the homoepitaxial growth of Fe(100) have been studied and compared. Our measurements clearly revealed that Pb and Bi were effective surfactants for enhancing layer-by-layer (LBL) growth in the Fe(100) homoepitaxy. Ag had the same effect, but it was less efficient due to the weak surface segregation of Ag. Using a surfactant Bi, we investigated the surfactant effect on the heteroepitaxial growth of Cr on Fe(100). It was found that a suitable amount of Bi enhanced the LBL growth of Cr on the Fe(100) surface. The surfactant effect of Bi on the heteroepitaxial growth of Fe/Cr(100) multilayers on the Fe(100) surface was also investigated. Predeposition of a small amount of Bi (0.08 ML) enhanced the LBL growth of the Fe/Cr(100) multilayer. The interface structures of the Fe/Cr multilayer with Bi were sharper as compared to the multilayer without Bi.
