title: Resonant photoemission and spin polarization of Co(1-x)Fe(x)S(2).
abstract: The valence band occupied state electronic structure of Co(1-x)Fe(x)S(2) in the region of the Fe/Co 3d bands has been investigated using photoemission and spin-polarized photoemission. As measured by using spin-polarized ultraviolet photoemission, the surface Fermi level spin polarization of Co(1-x)Fe(x)S(2) thin films at 50 K, specifically at x = 0, 0.05, 0.10 and 0.15, was found to be much reduced compared to that of the bulk. The spin polarization nonetheless increases with Fe concentration. The resonant photoemission spectroscopy provides evidence that S bands have a strong resonance at the photon energy corresponding to the Co 2p core level, indicating strong hybridization between Co and S bands in Co(1-x)Fe(x)S(2) (at small x). Similar evidence exists for Fe hybridization with the S bands.
authors.affiliation: Nebraska Center for Materials and Nanoscience, Department of Physics and Astronomy, University of Nebraska-Lincoln, 68588-0299, USA.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
authors.forename: Ning
authors.initials: N
authors.lastname: Wu
authors.forename: Michael
authors.initials: M
authors.lastname: Manno
authors.forename: C
authors.initials: C
authors.lastname: Leighton
authors.forename: Elio
authors.initials: E
authors.lastname: Vescovo
authors.forename: P A
authors.initials: PA
authors.lastname: Dowben
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008027:Light; D017785:Photons; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D013455:Sulfur / Q000737:chemistry*
chemical_list: D003035:Cobalt; D013455:Sulfur; D007501:Iron