We have investigated the induced polarization of paramagnetic Sb overlayers on the Heusler alloy NiMnSb. From combined X-ray absorption spectroscopy (XAS) and spin-polarized inverse photoemission spectroscopy (SPIPES), we can assign some of the unoccupied states of the Heusler alloy NiMnSb. With increasing thickness of the Sb overlayer, there is a decline in the density of states near the Fermi energy, as expected for a semimetal overlayer on a metallic substrate. While the Sb is polarized by the ferromagnetic NiMnSb substrate, consistent with the expectations of mean field theory, the polarization at the center of the surface/overlayer Brillouin zone cannot be easily related to the induced magnetization. (C) 2000 Elsevier Science B.V.
Publication Source (Journal or Book title)
Physics Letters, Section A: General, Atomic and Solid State Physics
Komesu, T., Borca, C., Jeong, H., Dowben, P., Ristoiu, D., Nozières, J., Stadler, S., & Idzerda, Y. (2000). The polarization of Sb overlayers on NiMnSb(100). Physics Letters, Section A: General, Atomic and Solid State Physics, 273 (4), 245-251. https://doi.org/10.1016/S0375-9601(00)00490-4