Local atomic order and element-specific magnetic moments of Fe3Si thin films on MgO(001) and GaAs(001) substrates
B Krumme, C Weis, HC Herper, F Stromberg, C Antoniak, A Warland, E Schuster, P Srivastava, M Walterfang, K Fauth, J Minar, H Ebert, P Entel, W Keune, H Wende
PHYSICAL REVIEW B | AMER PHYSICAL SOC | Published : 2009
We investigated the magnetic as well as the structural properties of Fe3 Si films on GaAs (001) - (4×6), GaAs (001) - (2×2), and MgO(001) by x-ray magnetic circular dichroism (XMCD) and Mössbauer spectroscopy. From the XMCD spectra we determine averaged magnetic moments of 1.3-1.6 μB per Fe atom on the different substrates by a standard sum-rule analysis. In addition, XMCD spectra have been calculated by using the multiple-scattering Korringa-Kohn-Rostoker method which allows the site-specific discussion of the x-ray spectra. The Mössbauer spectra show a highly ordered and stoichiometric growth of Fe3 Si on MgO while the growth on both GaAs substrates is strongly perturbed, probably due to d..View full abstract
Awarded by DFG
Awarded by BMBF
We thank U. v. Horsten for help with sample preparation and CEMS measurements. We gratefully acknowledge support during our beamtimes by BESSY staff. Financially supported by DFG (SFB 491 and SFB 445) and BMBF (Grant No. 05 ES3XBA/5).