IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Magnetic Interfaces and Nanostructures Thursday Sessions
       Session MI+TF-ThA

Paper MI+TF-ThA8
Spin-resolved Electronic Structure Studies of Ultrathin Films of Fe on GaAs

Thursday, November 1, 2001, 4:20 pm, Room 110

Session: Magnetic Thin Films and Surfaces I
Presenter: M. Spangenberg, CLRC Daresbury Laboratory, UK
Authors: M. Spangenberg, CLRC Daresbury Laboratory, UK
E.A. Seddon, CLRC Daresbury Laboratory, UK
E.M. McCash, University of York, UK
T. Shen, University of Salford, UK
S.A. Morton, University of Missouri-Rolla
G.D. Waddill, University of Missouri-Rolla
J.G. Tobin, Lawrence Livermore National Laboratory
Correspondent: Click to Email
Fe thin films of up to 5.5nm were deposited on singular and vicinal GaAs substrates and their magnetic and structural properties investigated by spin polarized photoelectron spectroscopy, magnetic linear dichroism in photoemission, magnetization measurements and X-ray diffraction. On both types of substrate the Fe grows predominantly as delta Fe. In agreement with literature results, the magnetization measurements and the magnetic linear dichroism results indicate very similar magnetic properties for the Fe films grown on the two substrate types. However, comparison of the spin polarized valence bands of the Fe films on the singular and the vicinal substrates reveal very significant differences. The possible origins of these observations will be presented. Comparisons and rationalisations will also be made (were possible) between our observations on Fe on GaAs and literature reports for other Fe thin film systems. For example, we have found that the spin polarized valence bands of Fe deposited on the vicinal GaAs exhibit similar features to those reported in the literature for 10nm Fe(100) films on Cu3Au(100) . In contrast, the spin polarized valence bands of Fe films on the singular GaAs are very different to all Fe thin film literature reports, with the differences concentrated in the minority spin channel.